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Author ![]() |
Tinck, S.; Bogaerts, A. | ||||
Title | Computational study of the CF4 /CHF3 / H2 /Cl2 /O2 /HBr gas phase plasma chemistry | Type | A1 Journal article | ||
Year | 2016 | Publication | Journal of physics: D: applied physics | Abbreviated Journal | J Phys D Appl Phys |
Volume | 49 | Issue | 49 | Pages | 195203 |
Keywords | A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) | ||||
Abstract | A modelling study is performed of high-density low-pressure inductively coupled CF4/CHF3/H2/Cl2/O2/HBr plasmas under different gas mixing ratios. A reaction set describing the complete plasma chemistry is presented and discussed. The gas fraction of each component in this mixture is varied to investigate the sensitivity of the plasma properties, like electron density, plasma potential and species densities, towards the gas mixing ratios. This research is of great interest for microelectronics applications because these gases are often combined in two (or more)-component mixtures, and mixing gases or changing the fraction of a gas can sometimes yield unwanted reaction products or unexpected changes in the overall plasma properties due to the increased chemical complexity of the system. Increasing the CF4 fraction produces more F atoms for chemical etching as expected, but also more prominently lowers the density of Cl atoms, resulting in an actual drop in the etch rate under certain conditions. Furthermore, CF4 decreases the free electron density when mixed with Cl2. However, depending on the other gas components, CF4 gas can also sometimes enhance free electron density. This is the case when HBr is added to the mixture. The addition of H2 to the gas mixture will lower the sputtering process, not only due to the lower overall positive ion density at higher H2 fractions, but also because more H+, H2 + and H3 + are present and they have very low sputter yields. In contrast, a larger Cl2 fraction results in more chemical etching but also in less physical sputtering due to a smaller abundance of positive ions. Increasing the O2 fraction in the plasma will always lower the etch rate due to more oxidation of the wafer surface and due to a lower plasma density. However, it is also observed that the density of F atoms can actually increase with rising O2 gas fraction. This is relevant to note because the exact balance between fluorination and oxidation is important for fine-tuning the overall etch rate and for control of the sidewall profile. Finally, HBr is often used as a chemical etcher, but when mixed with F- or Cl-containing gases, HBr creates the same diluting effects as Ar or He, because a higher fraction results in less chemical etching but more (physical) sputtering. |
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000375255500017 | Publication Date | 2016-04-13 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0022-3727 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 2.588 | Times cited | 5 | Open Access | |
Notes | We acknowledge the Fund for Scientific Research Flanders (FWO) for financial support of this work. This work was carried out in part using the Turing HPC infrastructure at the CalcUA core facility of the Universiteit Antwerpen, a division of the Flemish Supercomputer Center VSC, funded by the Hercules Foundation, the Flemish Government (department EWI) and the University of Antwerp. | Approved | Most recent IF: 2.588 | ||
Call Number | c:irua:132890 | Serial | 4062 | ||
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Author ![]() |
Tinck, S.; Bogaerts, A. | ||||
Title | Role of vibrationally excited HBr in a HBr/He inductively coupled plasma used for etching of silicon | Type | A1 Journal article | ||
Year | 2016 | Publication | Journal of physics: D: applied physics | Abbreviated Journal | J Phys D Appl Phys |
Volume | 49 | Issue | 49 | Pages | 245204 |
Keywords | A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) | ||||
Abstract | In this work, the role of vibrationally excited HBr (HBr(vib)) is computationally investigated for a HBr/He inductively coupled plasma applied for Si etching. It is found that at least 50% of all dissociations of HBr occur through HBr(vib). This additional dissociation pathway through HBr(vib) makes the plasma significantly more atomic. It also results in a slightly higher electron temperature (i.e. about 0.2 eV higher compared to simulation results where HBr(vib) is not included), as well as a higher gas temperature (i.e. about 50 K higher than without including HBr(vib)), due to the enhanced Franck–Condon heating through HBr(vib) dissociation, at the conditions investigated. Most importantly, the calculated etch rate with HBr(vib) included in the model is a factor 3 higher than in the case without HBr(vib), due to the higher fluxes of etching species (i.e. H and Br), while the chemical composition of the wafer surface shows no significant difference. Our calculations clearly show the importance of including HBr(vib) for accurate modeling of HBr-containing plasmas. |
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000377427100020 | Publication Date | 2016-05-17 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0022-3727 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 2.588 | Times cited | Open Access | ||
Notes | The Fund for Scientific Research Flanders (FWO) is acknowledged for financial support of this work (Grant no. 0880.212.840). This work was carried out in part using the Turing HPC infrastructure at the CalcUA core facility of the Universiteit Antwerpen, a division of the Flemish Supercomputer Center VSC, funded by the Hercules Foundation, the Flemish Government (department EWI) and the University of Antwerp. Prof. Mark Kushner is also gratefully acknowledged for the useful discussions and for providing the HPEM code. | Approved | Most recent IF: 2.588 | ||
Call Number | c:irua:133457 | Serial | 4072 | ||
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Author ![]() |
Tinck, S.; Altamirano-Sánchez, E.; De Schepper, P.; Bogaerts, A. | ||||
Title | Formation of a nanoscale SiO2 capping layer on photoresist lines with an Ar/SiCl4/O2 inductively coupled plasma : a modeling investigation | Type | A1 Journal article | ||
Year | 2014 | Publication | Plasma processes and polymers | Abbreviated Journal | Plasma Process Polym |
Volume | 11 | Issue | 1 | Pages | 52-62 |
Keywords | A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) | ||||
Abstract | PECVD of a nanoscale SiO2 capping layer using low pressure SiCl4/O-2/Ar plasmas is numerically investigated. The purpose of this capping layer is to restore photoresist profiles with improved line edge roughness. A 2D plasma and Monte Carlo feature profile model are applied for this purpose. The deposited films are calculated for various operating conditions to obtain a layer with desired shape. An increase in pressure results in more isotropic deposition with a higher deposition rate, while a higher power creates a more anisotropic process. Dilution of the gas mixture with Ar does not result in an identical capping layer shape with a thickness linearly correlated to the dilution. Finally, a substrate bias seems to allow proper control of the vertical deposition rate versus sidewall deposition as desired. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Weinheim | Editor | ||
Language | Wos | 000330588800006 | Publication Date | 2013-11-18 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1612-8850; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 2.846 | Times cited | 1 | Open Access | |
Notes | Approved | Most recent IF: 2.846; 2014 IF: 2.453 | |||
Call Number | UA @ lucian @ c:irua:115735 | Serial | 1256 | ||
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Author ![]() |
Tilleman, L.; De Henau, S.; Pauwels, M.; Nagy, N.; Pintelon, I.; Braeckman, B.P.; De Wael, K.; Van Doorslaer, S.; Adriaensen, D.; Timmermans, J.-P.; Moens, L.; Dewilde, S. | ||||
Title | An N-myristoylated globin with a redox-sensing function that regulates the defecation cycle in Caenorhabditis elegans | Type | A1 Journal article | ||
Year | 2012 | Publication | PLoS ONE | Abbreviated Journal | Plos One |
Volume | 7 | Issue | 12 | Pages | e48768-9 |
Keywords | A1 Journal article; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) | ||||
Abstract | Globins occur in all kingdoms of life where they fulfill a wide variety of functions. In the past they used to be primarily characterized as oxygen transport/storage proteins, but since the discovery of new members of the globin family like neuroglobin and cytoglobin, more diverse and complex functions have been assigned to this heterogeneous family. Here we propose a function for a membrane-bound globin of C. elegans, GLB-26. This globin was predicted to be myristoylated at its N-terminus, a post-translational modification only recently described in the globin family. In vivo, this globin is found in the membrane of the head mesodermal cell and in the tail stomato-intestinal and anal depressor muscle cells. Since GLB-26 is almost directly oxidized when exposed to oxygen, we postulate a possible function as electron transfer protein. Phenotypical studies show that GLB-26 takes part in regulating the length of the defecation cycle in C. elegans under oxidative stress conditions. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000313236200008 | Publication Date | 2012-12-12 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1932-6203 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 2.806 | Times cited | 6 | Open Access | |
Notes | ; SDH is a Ph.D. fellow of the Fund for Scientific Research (FWO). Financial support to SD and LM was provided by the University of Antwerp (BOF UA TOP 2006) and to SD, LM, BPB, by FWO project G.0247.09. The UltraVIEW VoX spinning disk confocal microscope was purchased with support of the Hercules Foundation (Hercules Type 1: AUHA 09/001). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. ; | Approved | Most recent IF: 2.806; 2012 IF: 3.730 | ||
Call Number | UA @ admin @ c:irua:102591 | Serial | 5741 | ||
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Author ![]() |
Tikhomirov, V.K.; Vosch, T.; Fron, E.; Rodríguez, V.D.; Velázquez, J.J.; Kirilenko, D.; Van Tendeloo, G.; Hofkens, J.; Van der Auweraer, M.; Moshchalkov, V.V. | ||||
Title | Luminescence of oxyfluoride glasses co-doped with Ag nanoclusters and Yb3+ ions | Type | A1 Journal article | ||
Year | 2012 | Publication | RSC advances | Abbreviated Journal | Rsc Adv |
Volume | 2 | Issue | 4 | Pages | 1496-1501 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Bulk oxyfluoride glasses co-doped with Ag nanoclusters and Yb3+ ions have been prepared by a melt quenching technique. When excited in the absorption band of the Ag nanoclusters between 300 to 500 nm, these glasses emit a broad band characteristic of the Ag nanoclusters between 400 to 750 nm as well as an emission band between 900 to 1100 nm, originating from Yb3+ ions. The intensity ratio of the Yb3+/Ag emission bands increases with the Ag doping level at a fixed concentration of Yb3+, indicating the presence of energy transfer mechanism from the Ag nanoclusters to the Yb3+ ions. Comparison of time-resolved decay kinetics of the luminescence in the respectively Ag nanocluster-Yb3+ co-doped and single Ag nanocluster doped glasses, hints towards an energy transfer from the red and infrared emitting Ag nanoclusters to the Yb3+ ions. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000299695300038 | Publication Date | 2011-12-19 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 2046-2069; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.108 | Times cited | 46 | Open Access | |
Notes | Fwo; Iap | Approved | Most recent IF: 3.108; 2012 IF: 2.562 | ||
Call Number | UA @ lucian @ c:irua:96239 | Serial | 1856 | ||
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Author ![]() |
Tikhomirov, V.K.; Rodríguez, V.D.; Méndez-Ramos, J.; del- Castillo, J.; Kirilenko, D.; Van Tendeloo, G.; Moshchalkov, V.V. | ||||
Title | Optimizing Er/Yb ratio and content in Er-Yb co-doped glass-ceramics for enhancement of the up- and down-conversion luminescence | Type | A1 Journal article | ||
Year | 2012 | Publication | Solar energy materials and solar cells | Abbreviated Journal | Sol Energ Mat Sol C |
Volume | 100 | Issue | Pages | 209-215 | |
Keywords | A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) | ||||
Abstract | Er3+Yb3+ co-doped transparent glass-ceramics with varying Er/Yb content and ratio have been prepared. High quantum yields for up- and down-conversion luminescence by energy transfer from Yb3+ to Er3+ and from Er3+ to Yb3+, respectively, have been detected and optimized with respect to the Er/Yb content and ratio, and proposed in particular for up- and down-conversion of solar spectrum for enhancement of the efficiency of solar cells. The rise and decay kinetics for the population of the excited levels of Er3+ and Yb3+ have been studied and fit. Based on these experimental data, the mechanisms for the energy transfers have been suggested with emphasis on the optimized Er/Yb content and ratio for enhancement of the efficiency of the Er3+↔Yb3+ energy transfers. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Amsterdam | Editor | ||
Language | Wos | 000303034700030 | Publication Date | 2012-02-04 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0927-0248; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 4.784 | Times cited | 66 | Open Access | |
Notes | Fwo | Approved | Most recent IF: 4.784; 2012 IF: 4.630 | ||
Call Number | UA @ lucian @ c:irua:97392 | Serial | 2493 | ||
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Author ![]() |
Tikhomirov, V.K.; Rodriguez, V.D.; Kutznetsov, D.; Kirilenko, D.; Van Tendeloo, G.; Moshchalkov, V.V. | ||||
Title | Preparation and luminescence of bulk oxyfluoride glasses doped with Ag nanoclusters | Type | A1 Journal article | ||
Year | 2010 | Publication | Optics express | Abbreviated Journal | Opt Express |
Volume | 18 | Issue | 21 | Pages | 22032-22040 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Bulk oxyfluoride glasses doped with Ag nanoclusters have been prepared using the melt quenching technique. When pumped in the absorption band of Ag nanoclusters between 300 to 500 nm, these glasses emit a very broad luminescence band covering all the visible range with a weak tail extending into the near infrared. The maximum of the luminescence band and its color shifts to the blue with a shortening of the excitation wavelength and an increasing ratio of oxide to fluoride components, resulting in white color luminescence at a particular ratio of oxide to fluoride; with a quantum yield above 20%. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000283686500057 | Publication Date | 2010-10-04 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1094-4087; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.307 | Times cited | 74 | Open Access | |
Notes | Methusalem | Approved | Most recent IF: 3.307; 2010 IF: 3.753 | ||
Call Number | UA @ lucian @ c:irua:85802 | Serial | 2698 | ||
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Author ![]() |
Tikhomirov, A.S.; Sorokina, N.E.; Shornikova, O.N.; Morozov, V.A.; Van Tendeloo, G.; Avdeev, V.V. | ||||
Title | The chemical vapor infiltration of exfoliated graphite to produce carbon/carbon composites | Type | A1 Journal article | ||
Year | 2011 | Publication | Carbon | Abbreviated Journal | Carbon |
Volume | 49 | Issue | 1 | Pages | 147-153 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Chemical vapor infiltration was used for the production of carbon/carbon composites based on exfoliated graphite and pyrolytic carbon Two different exfoliated graphites compacted to densities of 0 05-0 4 g/cm(3) were used as a preform The influence of the synthesis conditions (temperature, pressure, time etc) on the degree of infiltration, the pyrolytic carbon morphology and the C/C composite characteristics was examined using Raman spectroscopy, scanning electron microscopy and low-temperature nitrogen adsorption (C) 2010 Elsevier Ltd All rights reserved | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Oxford | Editor | ||
Language | Wos | 000284977500021 | Publication Date | 2010-09-08 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0008-6223; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 6.337 | Times cited | 7 | Open Access | |
Notes | Iap | Approved | Most recent IF: 6.337; 2011 IF: 5.378 | ||
Call Number | UA @ lucian @ c:irua:99185 | Serial | 354 | ||
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Author ![]() |
Tian, H.; Verbeeck, J.; Brück, S.; Paul, M.; Kufer, D.; Sing, M.; Claessen, R.; Van Tendeloo, G. | ||||
Title | Interface-induced modulation of charge and polarization in thin film Fe3O4 | Type | A1 Journal article | ||
Year | 2014 | Publication | Advanced materials | Abbreviated Journal | Adv Mater |
Volume | 26 | Issue | 3 | Pages | 461-465 |
Keywords | A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) | ||||
Abstract | Charge and polarization modulations in Fe3O4 are controlled by taking advantage of interfacial strain effects. The feasibility of oxidation state control by strain modification is demonstrated and it is shown that this approach offers a stable configuration at room temperature. Direct evidence of how a local strain field changes the atomic coordination and introduces atomic displacements leading to polarization of Fe ions is presented. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Weinheim | Editor | ||
Language | Wos | 000334289300011 | Publication Date | 2013-10-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0935-9648; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 19.791 | Times cited | 15 | Open Access | |
Notes | Vortex; FWO; Countatoms; Hercules ECASJO_; | Approved | Most recent IF: 19.791; 2014 IF: 17.493 | ||
Call Number | UA @ lucian @ c:irua:112419UA @ admin @ c:irua:112419 | Serial | 1694 | ||
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Author ![]() |
Tian, H.; Schryvers, D.; Shabalovskaya, S.; van Humbeeck, J. | ||||
Title | Microstructure of surface and subsurface layers of a Ni-Ti shape memory microwire | Type | A1 Journal article | ||
Year | 2009 | Publication | Microscopy and microanalysis | Abbreviated Journal | Microsc Microanal |
Volume | 15 | Issue | Pages | 62-70 | |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | The microstructure of a 55 Êm diameter, cold-worked Ni-Ti microwire is investigated by different transmission electron microscopy techniques. The surface consists of a few hundred nanometer thick oxide layer composed of TiO and TiO2 with a small fraction of inhomogeneously distributed Ni. The interior of the wire has a core-shell structure with primarily B2 grains in the 1 Êm thick shell, and heavily twinned B19 martensite in the core. This core-shell structure can be explained by a concentration gradient of the alloying elements resulting in a structure separation due to the strong temperature dependence of the martensitic start temperature. Moreover, in between the B2 part of the metallic core-shell and the oxide layer, a Ni3Ti interfacial layer is detected. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Cambridge, Mass. | Editor | ||
Language | Wos | 000262912700009 | Publication Date | 2009-01-15 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1431-9276;1435-8115; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 1.891 | Times cited | 15 | Open Access | |
Notes | FWO G.0465.05; Multimat | Approved | Most recent IF: 1.891; 2009 IF: 3.035 | ||
Call Number | UA @ lucian @ c:irua:72319 | Serial | 2074 | ||
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Author ![]() |
Tian, H.; Schryvers, D.; Mohanchandra, K.P.; Carman, G.P.; van Humbeeck, J. | ||||
Title | Fabrication and characterization of functionally graded Ni-Ti multilayer thin films | Type | A1 Journal article | ||
Year | 2009 | Publication | Functional materials letters | Abbreviated Journal | Funct Mater Lett |
Volume | 2 | Issue | 2 | Pages | 61-66 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | A functionally graded multilayer NiTi thin film was deposited on a SiO2/Si substrate by d.c. sputtering using a ramped heated NiTi alloy target. The stand-alone films were crystallized at 500°C in vacuum better than 10-7 Torr. Transmission electron microscopy micrographs taken along the film cross section show two distinct regions, thin and thick, with weak R and B2 phases, respectively. The film compositions along the thickness were measured and quantified using the standard-less EELSMODEL method. The film deposited during the initial thermal ramp (thin regions) displays an average of 54 at.% Ni while the film deposited at a more elevated target temperature (thick regions) shows about 51 at.% Ni. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000271077000003 | Publication Date | 2009-07-22 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1793-6047;1793-7213; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 1.234 | Times cited | 9 | Open Access | |
Notes | Fwo | Approved | Most recent IF: 1.234; 2009 IF: 2.561 | ||
Call Number | UA @ lucian @ c:irua:77655 | Serial | 1165 | ||
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Author ![]() |
Tian, H.; Schryvers, D.; Liu, D.; Jiang, Q.; van Humbeeck, J. | ||||
Title | Stability of Ni in nitinol oxide surfaces | Type | A1 Journal article | ||
Year | 2011 | Publication | Acta biomaterialia | Abbreviated Journal | Acta Biomater |
Volume | 7 | Issue | 2 | Pages | 892-899 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | The stability of Ni in titanium oxide surface layers on nitinol wires known to release certain amounts of Ni was investigated by first principles density functional theory and transmission electron microscopy. The oxides were identified as a combination of TiO and TiO2 depending on the thickness of the layer. The calculations indicate that free Ni atoms can exist in TiO at ambient temperature while Ni particles form in TiO2, which was confirmed by the transmission electron microscopy observations. The results are discussed with respect to surface stability and Ni release due to free Ni atoms and Ni particles. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | S.l. | Editor | ||
Language | Wos | 000286707700047 | Publication Date | 2010-09-17 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1742-7061; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 6.319 | Times cited | 39 | Open Access | |
Notes | Fwo | Approved | Most recent IF: 6.319; 2011 IF: 4.865 | ||
Call Number | UA @ lucian @ c:irua:85998 | Serial | 3128 | ||
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Author ![]() |
Tian, H.; Schryvers, D.; Claeys, P. | ||||
Title | Nanodiamonds do not provide unique evidence for a Younger Dryas impact | Type | A1 Journal article | ||
Year | 2011 | Publication | Proceedings of the National Academy of Sciences of the United States of America | Abbreviated Journal | P Natl Acad Sci Usa |
Volume | 108 | Issue | 1 | Pages | 40-44 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Microstructural, δ13C isotope and C/N ratio investigations were conducted on excavated material from the black Younger Dryas boundary in Lommel, Belgium, aiming for a characterisation of the carbon content and structures. Cubic diamond nanoparticles are found in large numbers. The larger ones with diameters around or above 10 nm often exhibit single or multiple twins. The smaller ones around 5 nm in diameter are mostly defect-free. Also larger flake-like particles, around 100 nm in lateral dimension, with a cubic diamond structure are observed as well as large carbon onion structures. The combination of these characteristics does not yield unique evidence for an exogenic impact related to the investigated layer. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Washington, D.C. | Editor | ||
Language | Wos | 000285915000012 | Publication Date | 2010-12-21 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0027-8424;1091-6490; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 9.661 | Times cited | 32 | Open Access | |
Notes | Approved | Most recent IF: 9.661; 2011 IF: 9.681 | |||
Call Number | UA @ lucian @ c:irua:88733 | Serial | 2254 | ||
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Author ![]() |
Tian, F.; Wang, Y.; Sandhu, H.S.; Gielis, J.; Shi, P. | ||||
Title | Comparison of seed morphology of two ginkgo cultivars | Type | A1 Journal article | ||
Year | 2020 | Publication | Journal Of Forestry Research | Abbreviated Journal | J Forestry Res |
Volume | 31 | Issue | 3 | Pages | 751-758 |
Keywords | A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) | ||||
Abstract | Ginkgo biloba L. is a precious relic tree species with important economic value. Seeds, as a vital reproductive organ of plants, can be used to distinguish cultivars of the species. We chose 400 seeds from two cultivars of ginkgo (Fozhi and Maling; 200 seeds for each cultivar) as the study material and used the Gielis equation to fit the projected shape of these seeds. The coefficients of variation (CV) in root mean squared errors (RMSE) obtained from the fitted data were used to compare the level of inter-cultivar variations in seed shape. We also used the covariance analysis to compare the allometric relationships between seed weights and projected areas of these two cultivars. The Gielis equation fitted well the seed shapes of two ginkgo cultivars. The lower CV in RMSE of cultivar Fozhi than Maling indicated a less symmetrical seed shape in the latter than the former. The bootstrap percentile method showed that the seed shape differences between the two cultivars were significant. However, there was no significant difference in the exponents between the seed weights and the projected areas of these two cultivars. Overall, the significant differences in shapes between the seeds of two ginkgo cultivars were well explained by the Gielis equation; this model can be further extended to compare morphological differences in other ginkgo cultivars, and even for plant seeds or animal eggs that have similar oval shapes. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000529367600005 | Publication Date | 2018-07-28 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1007-662x | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3 | Times cited | 3 | Open Access | |
Notes | ; ; | Approved | Most recent IF: 3; 2020 IF: 0.774 | ||
Call Number | UA @ admin @ c:irua:154987 | Serial | 6474 | ||
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Author ![]() |
Thomé, T.; Colaux, J.L.; Colomer, J.-F.; Bertoni, G.; Terwagne, G. | ||||
Title | Formation of carbon nitride nanospheres by ion implantation | Type | A1 Journal article | ||
Year | 2007 | Publication | Materials chemistry and physics | Abbreviated Journal | Mater Chem Phys |
Volume | 103 | Issue | 2-3 | Pages | 290-294 |
Keywords | A1 Journal article; Electron microscopy for materials research (EMAT) | ||||
Abstract | Carbon nitride nanospheres have been synthesized into copper by simultaneous high fluence (10(18) at. cm(-2)) implantations of C-12 and N-15 ions. The composition of the implanted region has been measured using C-12(d,p(0))C-13 and N-15(d,alpha(0))C-13 nuclear reactions induced by a 1.05 MeV deuteron beam. The C-12 and N-15 depth profiles are very close and the retained doses into copper are relatively high, which indicates that carbon and nitrogen diffusion processes are likely limited during implantation. High resolution transmission electron microscopy (HRTEM) observations and electron diffraction (ED) analyses have been carried out to determine the structure of the nanospheres formed during implantation. Some consist in small hollow amorphous nanocapsules with sizes ranging from 30 to 100 nm. Large gas bubbles with diameters up to 300 mn have also been observed in the copper matrix. Electron energy-loss spectroscopy (EELS) measurements performed on the small nanocapsules indicate that their shells are composed of carbon and nitrogen. (c) 2007 Elsevier B.V. All rights reserved. | ||||
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Publisher | Place of Publication | Lausanne | Editor | ||
Language | Wos | 000247715300016 | Publication Date | 2007-02-25 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0254-0584; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 2.084 | Times cited | 1 | Open Access | |
Notes | Approved | Most recent IF: 2.084; 2007 IF: 1.871 | |||
Call Number | UA @ lucian @ c:irua:102670 | Serial | 1258 | ||
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Author ![]() |
Thomassen, G.; Van Passel, S.; Dewulf, J. | ||||
Title | A review on learning effects in prospective technology assessment | Type | A1 journal article | ||
Year | 2020 | Publication | Renewable & Sustainable Energy Reviews | Abbreviated Journal | Renew Sust Energ Rev |
Volume | 130 | Issue | Pages | 109937 | |
Keywords | A1 journal article; Learning effects; Life cycle assessment; Techno-economic assessment; Prospective technology assessment; Learning-by-doing; Learning curve; Progress rate; Experience curve; Engineering Management (ENM) ; | ||||
Abstract | Global environmental problems have urged the need for developing sustainable technologies. However, new technologies that enter the market have often higher economic costs and potentially higher environmental impacts than conventional technologies. This can be explained by learning effects: a production process that is performed for the first time runs less smooth than a production process that has been in operation for years. To obtain a fair estimation of the potential of a new technology, learning effects need to be included. A review on the current literature on learning effects was conducted in order to provide guidelines on how to include learning effects in prospective technology assessment. Based on the results of this review, five recommendations have been formulated and an integration of learning effects in the structure of prospective technology assessment has been proposed. These five recommendations include the combined use of learning effects on the component level and on the end product level; the combined use of learning effects on the technical, economic and environmental level; the combined use of extrapolated values and expert estimates; the combined use of learning-by-doing and learning-by-searching effects and; a tier-based method, including quality criteria, to calculate the learning effect. These five complementary strategies could lead to a clearer perspective on the environmental impact and cost structure of the new technology and a fairer comparison base with conventional technologies, potentially resulting in a faster adoption and a shorter time-to-market for sustainable technologies. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000548790900008 | Publication Date | 2020-06-10 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1364-0321 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 15.9 | Times cited | Open Access | ||
Notes | The authors acknowledge the full financial support received from the Flemish administration via the Steunpunt Circulaire Economie (Policy Research Centre Circular Economy). We would also like to thank the SDEWES conference for the best paper award which was granted to the current paper. The authors declare no competing financial interests. This publication contains the opinions of the authors, not that of the Flemish administration. The Flemish administration will not carry any liability with respect to the use that can be made of the produced data or conclusions. | Approved | Most recent IF: 15.9; 2020 IF: 8.05 | ||
Call Number | ENM @ enm @c:irua:170076 | Serial | 6389 | ||
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Author ![]() |
Thomassen, G.; Van Passel, S.; Alaerts, L.; Dewulf, J. | ||||
Title | Retrospective and prospective material flow analysis of the post-consumer plastic packaging waste management system in Flanders | Type | A1 Journal article | ||
Year | 2022 | Publication | Waste Management | Abbreviated Journal | Waste Manage |
Volume | 147 | Issue | Pages | 10-21 | |
Keywords | A1 Journal article; Engineering Management (ENM) | ||||
Abstract | The post-consumer plastic packaging waste management in Flanders was analyzed by performing a retrospective material flow analysis, covering an extensive period from 1985 to 2019. In addition, a prospective material flow analysis of 32 improvement scenarios was performed, based on expected changes in the waste management system. Mass recovery rates were calculated based on different interpretations of the calculation rules. Moreover, various cascading levels were identified to differentiate between the quality level of the secondary applications. The mass recovery rate including only recycling evolved from a value of 0% in 1985 to 31% in 2019 and could be increased to 36-62% depending on the improvement scenario selected. However, the different interpretations of the calculation rules led to a variation of up to 20 and 41% on this mass recovery rates for the retrospective and prospective analysis, respectively. The introduction of monostream recycling for additional post-consumer plastic packaging flows, such as low-density polyethylene, did not lead to increasing mass recovery rates, if no differentiation for the cascading levels was made. The Belgian recycling target of 65% for 2023 will be challenging if the strictest calculation method needs to be followed or if the improvements in the Flemish postconsumer plastic packaging waste system do not follow the best-case collection scenarios under the given assumptions. To harmonize the calculation and monitoring of these targets, clear calculation rules need to be accompanied with a harmonized monitoring system over the entire waste management system. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000802961100002 | Publication Date | 2022-05-17 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0956-053x | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 8.1 | Times cited | Open Access | OpenAccess | |
Notes | Approved | Most recent IF: 8.1 | |||
Call Number | UA @ admin @ c:irua:188651 | Serial | 7367 | ||
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Author ![]() |
Thomassen, G.; Van Dael, M.; You, F.; Van Passel, S. | ||||
Title | A multi-objective optimization-extended techno-economic assessment : exploring the optimal microalgal-based value chain | Type | A1 Journal article | ||
Year | 2019 | Publication | Green Chemistry | Abbreviated Journal | Green Chem |
Volume | 21 | Issue | 21 | Pages | 5945-5959 |
Keywords | A1 Journal article; Economics; Engineering sciences. Technology; Engineering Management (ENM) | ||||
Abstract | The use of fossil-based products induces a large environmental burden. To lighten this burden, green technologies are required that can replace their fossil-based counterparts. To enable the development of economically viable green technologies, an optimization towards both economic and environmental objectives is required. To perform this multi-objective optimization (MOO), the environmental techno-economic assessment (ETEA) methodology is extended towards a MOO-extended ETEA. The development of this MOO-extended ETEA is the main objective of this manuscript. As an example of a green technology, the concept of microalgae biorefineries is used as a case study to illustrate the MOO-extended ETEA. According to the results, all optimal value chains include open pond cultivation, a membrane for medium recycling and spray drying. The optimal economic value chain uses Nannochloropsis sp. in a one-stage cultivation to produce fish larvae feed, while the optimal environmental design uses Dunaliella salina or Haematococcus pluvialis to produce carotenoids and fertilizer or energy products, by means of anaerobic digestion or gasification. The crucial parameters for both environmental and economic feasibility are the content, price and reference impact of the main end product, the growth parameters and the biomass and carotenoid recovery efficiency alongside the different process steps. By identifying the economic and environmentally optimal algal-based value chain and the crucial drivers, the MOO-extended ETEA provides insights on how algae-based value chains can be developed in the most economic and environmentally-friendly way. For example, the inclusion of a medium recycling step to lower the water and salt consumption is required in all Pareto-optimal scenarios. Another major insight is the requirement of high-value products such as carotenoids or specialty food to obtain and economically and environmentally feasible algal-based value chain. Due to the modular nature of the MOO-extended ETEA, multiple processes can be included or excluded from the superstructure. Although this case study is limited to current microalgae biorefinery technologies, the MOO-extended ETEA can also be used to assess the economic and environmental effect of more innovative technologies. This way, the MOO-extended ETEA provides a methodology to assess the economic and environmental potential of innovative green technologies and shorten their time-to-market. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000493077100016 | Publication Date | 2019-10-01 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1463-9262; 1463-9270 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 9.125 | Times cited | 1 | Open Access | |
Notes | ; ; | Approved | Most recent IF: 9.125 | ||
Call Number | UA @ admin @ c:irua:164296 | Serial | 6230 | ||
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Author ![]() |
Thomassen, G.; Van Dael, M.; Van Passel, S.; You, F. | ||||
Title | How to assess the potential of emerging green technologies? Towards a prospective environmental and techno-economic assessment framework | Type | A1 Journal article | ||
Year | 2019 | Publication | Green Chemistry | Abbreviated Journal | Green Chem |
Volume | 21 | Issue | 18 | Pages | 4868-4886 |
Keywords | A1 Journal article; Engineering sciences. Technology; Engineering Management (ENM) | ||||
Abstract | For sustainable production and consumption, emerging green technologies need to be optimized towards a minimal environmental impact and a maximal economic impact. In an early stage of technology development, more flexibility is available to adapt the technology. Therefore, a prospective environmental and techno-economic assessment is required. The prospective assessment differs at the different stages of technology development, as also the data availability and accuracy evolves. This paper reviews the different prospective technological, economic and environmental assessment methods which have been used to assess the potential of new green chemical technologies. Based on the current best practices, an overarching framework is introduced to assess the technological, economic and environmental potential of an emerging green chemical technology at the different stages of technology development. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000486309300002 | Publication Date | 2019-08-13 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1463-9262; 1463-9270 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 9.125 | Times cited | 5 | Open Access | |
Notes | ; ; | Approved | Most recent IF: 9.125 | ||
Call Number | UA @ admin @ c:irua:163782 | Serial | 6211 | ||
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Author ![]() |
Thomassen, G.; Van Dael, M.; Van Passel, S. | ||||
Title | The potential of microalgae biorefineries in Belgium and India : an environmental techno-economic assessment | Type | A1 Journal article | ||
Year | 2018 | Publication | Bioresource Technology | Abbreviated Journal | Bioresource Technol |
Volume | 267 | Issue | 267 | Pages | 271-280 |
Keywords | A1 Journal article; Engineering sciences. Technology; Engineering Management (ENM) | ||||
Abstract | This study performs an environmental techno-economic assessment (ETEA) for multiple microalgae biorefinery concepts at different locations, those being Belgium and India. The ETEA methodology, which integrates aspects of the TEA and LCA methodologies and provides a clear framework for an integrated assessment model, has been proposed and discussed. The scenario in India has a higher profitability with a NPV of (sic)40 million over a period of 10 years, while the environmental impact in Belgium is lower. The inclusion of a medium recycling step provides the best scenario from both perspectives. The crucial parameters for feasibility are the beta-caroteneprice and content, the upstream environmental impact of electricity and the maximum biomass concentration during cultivation. The identification of these parameters by the ETEA guides future technology developments and shortens the time-to-market for microalgal-based biorefineries. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000441876100034 | Publication Date | 2018-07-10 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0960-8524 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles; WoS full record; WoS citing articles | |
Impact Factor | 5.651 | Times cited | 8 | Open Access | |
Notes | ; ; | Approved | Most recent IF: 5.651 | ||
Call Number | UA @ admin @ c:irua:153599 | Serial | 6270 | ||
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Thomassen, G.; Van Dael, M.; Lemmens, B.; Van Passel, S. | ||||
Title | A review of the sustainability of algal-based biorefineries : towards an integrated assessment framework | Type | A1 Journal article | ||
Year | 2017 | Publication | Renewable & Sustainable Energy Reviews | Abbreviated Journal | Renew Sust Energ Rev |
Volume | 68 | Issue | 2 | Pages | 876-887 |
Keywords | A1 Journal article; Economics; Engineering sciences. Technology; Engineering Management (ENM) | ||||
Abstract | Algal-based bioenergy products have faced multiple economic and environmental problems. To counter these problems, algal-based biorefineries have been proposed as a promising solution. Multiple environmental and economic assessments have analyzed this concept. However, a wide variation in results was reported. This study performs a review to evaluate the methodological reasons behind this variation. Based on this review, four main challenges for a sustainability assessment were identified: 1) the use of a clear framework; 2) the adaptation of the methodology to all stages of technological maturity; 3) the use of harmonized assumptions; 4) the integration of the technological process. A generic methodology, based on the integration of a techno-economic assessment methodology and a streamlined life cycle assessment was proposed. This environmental techno-economic assessment can be performed following an iterative approach during each stage of technology development. In this way, crucial technological parameters can be directly identified and evaluated during the maturation of the technology. The use of this assessment methodology can therefore act as guidance to decrease the time-to-market for innovative and sustainable technologies. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000391899400005 | Publication Date | 2016-03-16 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1364-0321; 1879-0690 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 8.05 | Times cited | 23 | Open Access | |
Notes | ; ; | Approved | Most recent IF: 8.05 | ||
Call Number | UA @ admin @ c:irua:139038 | Serial | 6245 | ||
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Thomassen, G.; Huysveld, S.; Boone, L.; Vilain, C.; Geysen, D.; Huysman, K.; Cools, B.; Dewulf, J. | ||||
Title | The environmental impact of household's water use: A case study in Flanders assessing various water sources, production methods and consumption patterns | Type | A1 Journal Article | ||
Year | 2021 | Publication | Science Of The Total Environment | Abbreviated Journal | Sci Total Environ |
Volume | 770 | Issue | Pages | 145398 | |
Keywords | A1 Journal Article; Engineering Management (ENM) ; | ||||
Abstract | Responsible water use and sustainable consumption and production are high on the agenda of multiple stakeholders. Different water supply sources are available, including tap water, bottled water, domestically harvested rainwater and domestically abstracted groundwater. The extent to which each of these water supply sources is used, differs over consumption patterns in various housing types, being detached houses, semi-detached houses, terraced houses and apartments. To identify the environmental impact of a household's water use and potential environmental impact reduction strategies, a holistic assessment is required. In this paper, the environmental impact of a household's water use in Flanders (Belgium) was assessed including four different water supply sources and four different consumption patterns by means of a life cycle assessment. The outcomes of this study reveal a large difference between the environmental impact of bottled water use, having a global warming impact of 259 kg CO2-eq.·m−3, compared to the other three supply sources. Tap water supply had the lowest global warming impact (0.17 kg CO2-eq.·m−3) and resource footprint (6.51 MJex·m−3) of all water supply sources. The most efficient strategy to reduce the environmental impact of household's water use is to shift the water consumption from bottled to tap water consumption. This would induce a reduction in global warming impact of the water use of an inhabitant in Flanders by on average 80%, saving 0.1 kg CO2-eq.·day−1 in case of groundwater-based tap water. These results provide insights into sustainable water use for multiple consumption patterns and can be used to better frame the environmental benefits of tap water use. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | Publication Date | 2021-01-27 | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0048-9697 | ISBN | Additional Links | ||
Impact Factor | 4.9 | Times cited | Open Access | Not_Open_Access | |
Notes | This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. | Approved | Most recent IF: 4.9 | ||
Call Number | ENM @ enm @ | Serial | 6681 | ||
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Thomassen, G.; Egiguren Vila, U.; Van Dael, M.; Lemmens, B.; Van Passel, S. | ||||
Title | A techno-economic assessment of an algal-based biorefinery | Type | A1 Journal article | ||
Year | 2016 | Publication | Clean Technologies And Environmental Policy | Abbreviated Journal | Clean Technol Envir |
Volume | 18 | Issue | 6 | Pages | 1849-1862 |
Keywords | A1 Journal article; Economics; Engineering sciences. Technology; Engineering Management (ENM) | ||||
Abstract | Economic and technological assessments have identified difficulties with the commercialization of bulk products from microalgae, like biofuels. To overcome these problems, a multi-product algal-based biorefinery has been proposed. This paper performs a techno-economic assessment of such a biorefinery. Four production pathways, ranging from a base case with commercial technologies to an improved case with innovative technologies, are analyzed. All region-specific parameters were adapted to Belgian conditions. Three scenarios result in techno-economically viable production plants. The most profitable scenario is the scenario which uses a specialized membrane for medium recycling and an open pond algae cultivation. Although the inclusion of a photobioreactor decreases the culture medium costs, the higher investment costs result in lower economic profits. The carotenoid content and price are identified as critical parameters. Furthermore, the economies of scale assumption for the photobioreactor is critical for the feasibility of this cultivation technology. The techno-economic assessment is an important methodology to guide and evaluate further improvements in research and shorten the time-to-market for innovative technologies in this field. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000384470700017 | Publication Date | 2016-03-26 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1618-954x | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles; WoS full record; WoS citing articles | |
Impact Factor | 3.331 | Times cited | 24 | Open Access | |
Notes | ; We would like to thank Herman Beckers, Metin Bulut, Frans Snijkers, Joris van der Have, Jan Vanderheyden, Leen Bastiaens, and Lies Eykens for the provision of technological and economic data and the useful discussions on the assumptions in the model. We would also like to thank Eva Cordery for proofreading the article and the anonymous reviewers for their valuable feedback and suggestions. Furthermore, we gratefully acknowledge the financial support of the Fundacion Novia Salcedo. ; | Approved | Most recent IF: 3.331 | ||
Call Number | UA @ admin @ c:irua:139027 | Serial | 6262 | ||
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Thomassen, G.; Dewulf, J.; Van Passel, S. | ||||
Title | Prospective material and substance flow analysis of the end-of-life phase of crystalline silicon-based PV modules | Type | A1 Journal article | ||
Year | 2022 | Publication | Resources Conservation And Recycling | Abbreviated Journal | Resour Conserv Recy |
Volume | 176 | Issue | Pages | 105917 | |
Keywords | A1 Journal article; Engineering Management (ENM) | ||||
Abstract | The approaching end-of life phase of early installed PV modules gave rise to a variety of potential end-of-life strategies, ranging from basic generic waste management strategies to advanced case-specific recycling options. However, no comprehensive assessment on the full range of technological possibilities is available and only limited attention was given to the material recovery rates of these different technologies in light of circular economy. In addition, current material recovery rates are indifferent towards the material value and the value of their secondary applications. Based on an extensive literature review, ten end-of-life scenarios with potential learning effects are identified and their material flows are quantified using a combined material and substance flow analysis. Subsequently, material recovery rates from a mass, economic value and embodied energy perspective are calculated, incorporating the differences in secondary applications. The differences in the mass-based recovery rates of the seven end-of-life scenarios that did not have landfill or municipal waste incineration as the main destination were minimal, as 73-79% of the mass was recovered for the best-case learning scenario. For the economic value recovery rate (9-66%) and the embodied energy recovery rate (18-45%), more profound differences were found. The collection rate was identified as most crucial parameter for all end-of-life scenarios, learning scenarios and recycling indicators. The mass-based recovery rate might favor end-of-life scenarios that lead to dissipation of valuable materials in non-functional secondary applications. Additional targets are required to avoid cascading of valuable materials and to avoid the economic cost and environmental burden of virgin materials. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000708339400003 | Publication Date | 2021-10-08 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0921-3449 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 13.2 | Times cited | Open Access | OpenAccess | |
Notes | Approved | Most recent IF: 13.2 | |||
Call Number | UA @ admin @ c:irua:182462 | Serial | 6939 | ||
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Thiruvottriyur Shanmugam, S.; Van Echelpoel, R.; Boeye, G.; Eliaerts, J.; Samanipour, M.; Ching, H.Y.V.; Florea, A.; Van Doorslaer, S.; Van Durme, F.; Samyn, N.; Parrilla, M.; De Wael, K. | ||||
Title | Towards developing a screening strategy for ecstasy : revealing the electrochemical profile | Type | A1 Journal article | ||
Year | 2021 | Publication | Chemelectrochem | Abbreviated Journal | Chemelectrochem |
Volume | 8 | Issue | 24 | Pages | 4826-4834 |
Keywords | A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Organic synthesis (ORSY); Applied Electrochemistry & Catalysis (ELCAT); Antwerp Electrochemical and Analytical Sciences Lab (A-Sense Lab) | ||||
Abstract | This article describes the development of an electrochemical screening strategy for 3,4-methylenedioxymethamphetamine (MDMA), the regular psychoactive compound in ecstasy (XTC) pills. We have investigated the specific electrochemical profile of MDMA and its electro-oxidation mechanisms at disposable graphite screen-printed electrodes. We have proved that the formation of a radical cation and subsequent reactions are indeed responsible for the electrode surface passivation, as evidenced by using electron paramagnetic resonance spectroscopy and electrochemistry. Thereafter, pure cutting agents and MDMA as well as simulated binary mixtures of compounds with MDMA were subjected to square wave voltammetry at pH 7 to understand the characteristic electrochemical profile. An additional measurement at pH 12 was able to resolve false positives and negatives occurring at pH 7. Finally, validation of the screening strategy was done by measuring a set of ecstasy street samples. Overall, our proposed electrochemical screening strategy has been demonstrated for the rapid, sensitive, and selective detection of MDMA, resolving most of the false positives and negatives given by the traditional Marquis color tests, thus exhibiting remarkable promises for the on-site screening of MDMA. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000735883700020 | Publication Date | 2021-12-22 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 2196-0216 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 4.136 | Times cited | Open Access | OpenAccess | |
Notes | Approved | Most recent IF: 4.136 | |||
Call Number | UA @ admin @ c:irua:184371 | Serial | 8680 | ||
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Thiruvottriyur Shanmugam, S.; Trashin, S.; De Wael, K. | ||||
Title | Gold-sputtered microelectrodes with built-in gold reference and counter electrodes for electrochemical DNA detection | Type | A1 Journal article | ||
Year | 2020 | Publication | Analyst | Abbreviated Journal | Analyst |
Volume | Issue | Pages | |||
Keywords | A1 Journal article; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) | ||||
Abstract | Gold-sputtered microelectrodes with built-in gold reference and counter electrodes represent a promising platform for the development of disposable DNA sensors. Pretreating gold electrode surfaces and immobilization of DNA thereon is commonly employed in biosensing applications. However, with no scientific or practical guidelines to prepare a DNA sensor using these miniature gold-sputtered microelectrodes, cleaning and immobilization steps need to be systematically optimized and updated. In this work, we present efficient cleaning and modification of miniaturized gold-sputtered microelectrodes with thiolated DNA probes for DNA detection. Additional discussions on subtleties and nuances involved at each stage of pretreating and modifying gold-sputtered microelectrodes are included to present a robust, well-founded protocol. It was evident that the insights on cleaning polycrystalline gold disk electrodes with a benchmark electrode surface for DNA sensors, cannot be transferred to clean these miniature gold-sputtered microelectrodes. Therefore, a comparison between five different cleaning protocols was made to find the optimal one for gold-sputtered microelectrodes. Additionally, two principally different immobilization techniques for gold-sputtered microelectrode modification with thiolated ssDNA were compared i.e., immobilization through passive chemisorption and potential perturbation were compared in terms of thiol-specific attachment and thiol-unspecific adsorption through nitrogenous bases. The hybridization performance of these prepared electrodes was characterized by their sensitive complementary DNA capturing ability, detected by a standard alkaline phosphatase assay. Immobilization through passive chemisorption proved to be efficient in capturing the complementary target DNA with a detection limit of 0.14 nM and sensitivity of 9.38 A M−1 cm2. In general, this work presents a comprehensive understanding of cleaning, modification and performance of gold-sputtered microelectrodes with built-in gold reference and counter electrodes for both fundamental investigations and practical DNA sensing applications. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000592315100017 | Publication Date | 2020-09-17 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0003-2654 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 4.2 | Times cited | Open Access | ||
Notes | Approved | Most recent IF: 4.2; 2020 IF: 3.885 | |||
Call Number | UA @ admin @ c:irua:172447 | Serial | 6527 | ||
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Thiruvottriyur Shanmugam, S.; Trashin, S.; De Wael, K. | ||||
Title | Singlet oxygen-based photoelectrochemical detection of DNA | Type | A1 Journal article | ||
Year | 2022 | Publication | Biosensors and bioelectronics | Abbreviated Journal | |
Volume | 195 | Issue | Pages | 113652 | |
Keywords | A1 Journal article; Engineering sciences. Technology; Antwerp Electrochemical and Analytical Sciences Lab (A-Sense Lab) | ||||
Abstract | The current work, designed for the photoelectrochemical detection of DNA, evaluates light-responsive DNA probes carrying molecular photosensitizers generating singlet oxygen (1O2). We take advantage of their chromophore’s ability to produce 1O2 upon photoexcitation and subsequent photocurrent response. Type I, fluorescent and type II photosensitizers were studied using diode lasers at 406 nm blue, 532 nm green and 659 nm red lasers in the presensce and absence of a redox reporter, hydroquinone (HQ). Only type II photosensitizers (producing 1O2) resulted in a noticeable photocurrent in 1–4 nA range upon illumination, in particular, dissolved DNA probes labeled with chlorin e6 and erythrosine were found to give a well-detectable photocurrent response in the presence of HQ. Whereas, Type I photosensitizers and fluorescent chromophores generate negligible photocurrents (<0.15 nA). The analytical performance of the sensing system was evaluated using a magnetic beads-based DNA assay on disposable electrode platforms, with a focus to enhance the sensitivity and robustness of the technique in detecting complementary DNA targets. Amplified photocurrent responses in the range of 70–100 nA were obtained and detection limits of 17 pM and 10 pM were achieved using magnetic beads-captured chlorin e6 and erythrosine labeled DNA probes respectively. The presented novel photoelectrochemical detection can further be optimized and employed in applications for which enzymatic amplification such as polymerase chain reaction (PCR) is not applicable owing to their limitations and as an effective alternative to colorimetric detection when rapid detection of specific nucleic acid targets is required. | ||||
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Publisher | Place of Publication | Editor | |||
Language | Wos | 000705223300003 | Publication Date | 2021-09-23 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0956-5663 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | Open Access | OpenAccess | ||
Notes | Approved | no | |||
Call Number | UA @ admin @ c:irua:181796 | Serial | 8930 | ||
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Author ![]() |
Thiruvottriyur Shanmugam, S.; Campos, R.; Trashin, S.; Daems, E.; Carneiro, D.; Fraga, A.; Ribeiro, R.; De Wael, K. | ||||
Title | Singlet oxygen-based photoelectrochemical detection of miRNAs in prostate cancer patients’ plasma : a novel diagnostic tool for liquid biopsy | Type | A1 Journal article | ||
Year | 2024 | Publication | Bioelectrochemistry: an international journal devoted to electrochemical aspects of biology and biological aspects of electrochemistry | Abbreviated Journal | |
Volume | 158 | Issue | Pages | 108698-108699 | |
Keywords | A1 Journal article; Antwerp Electrochemical and Analytical Sciences Lab (A-Sense Lab) | ||||
Abstract | Dysregulation of miRNA expression occurs in many cancers, making miRNAs useful in cancer diagnosis and therapeutic guidance. In a clinical context using methods such as polymerase chain reaction (PCR), the limited amount of miRNAs in circulation often limits their quantification. Here, we present a PCR-free and sensitive singlet oxygen (1O2)-based strategy for the detection and quantification of miRNAs in untreated human plasma from patients diagnosed with prostate cancer. A target miRNA is specifically captured by functionalised magnetic beads and a detection oligonucleotide probe in a sandwich-like format. The formed complex is concentrated at the sensor surface via magnetic beads, providing an interface for the photoinduced redox signal amplification. The detection oligonucleotide probe bears a molecular photosensitiser, which produces 1O2 upon illumination, oxidising a redox reporter and creating a redox cycling loop, allowing quantification of pM level miRNA in diluted human plasma within minutes after hybridisation and without target amplification. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | Publication Date | 2024-04-04 | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1567-5394 | ISBN | Additional Links | UA library record | |
Impact Factor | 5 | Times cited | Open Access | ||
Notes | Approved | Most recent IF: 5; 2024 IF: 3.346 | |||
Call Number | UA @ admin @ c:irua:205281 | Serial | 9229 | ||
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Author ![]() |
Thirumalraj, alamurugan; Palanisamy, S.; Chen, S.-M.; De Wael, K. | ||||
Title | A graphene/gelatin composite material for the entrapment of hemoglobin for bioelectrochemical sensing applications | Type | A1 Journal article | ||
Year | 2016 | Publication | Journal of the electrochemical society | Abbreviated Journal | J Electrochem Soc |
Volume | 163 | Issue | 7 | Pages | 265-271 |
Keywords | A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) | ||||
Abstract | In the present work, a novel graphene (GN) and gelatin (GTN) composite was prepared and used as an immobilization matrix for hemoglobin (Hb). Compared with Hb immobilized on a bare, GN or GTN modified glassy carbon electrode (GCE), a stable and pair of well-defined quasi redox couple was observed at an Hb modified GN/GTN composite GCE at a formal potential of −0.306 V versus Ag|AgCl. The direct electrochemical behavior of Hb was greatly enhanced by the presence of both GTN and GN. A heterogeneous electron transfer rate constant (Ks) was calculated as 3.82 s−1 for Hb immobilized at GN/GTN modified GCE, which indicates the fast direct electron transfer of Hb toward the electrode surface. The biosensor shows a stable and wide linear response for H2O2 in the linear response range from 0.1 μM to 786.6 μM with an analytical sensitivity and limit of detection of 0.48 μAμM−1 cm−2 and 0.04 μM, respectively. The fabricated biosensor holds its high selectivity in the presence of potentially active interfering species and metal ions. The biosensor shows its satisfactory practical ability in the commercial contact lens solution and human serum samples. | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | 000377412900047 | Publication Date | 2016-04-08 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0013-4651 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | 3.259 | Times cited | 9 | Open Access | |
Notes | ; This project was supported by the Ministry of Science and Technology (project no. NSC1012113M027001MY3), Taiwan (Republic of China). The authors express their sincere thanks to Prof. Bih-Show Lou, Chemistry Division, Center for General Education, Chang Gung University, Tao-Yuan, Taiwan for providing the human serum samples. ; | Approved | Most recent IF: 3.259 | ||
Call Number | UA @ admin @ c:irua:132627 | Serial | 5635 | ||
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Author ![]() |
Theuns, T.; Michel, K.H. | ||||
Title | Free energy and structural phase transitions in mixed crystals: a microscopic derivation | Type | A1 Journal article | ||
Year | 1992 | Publication | Zeitschrift für Physik: B | Abbreviated Journal | |
Volume | 86 | Issue | Pages | 125-131 | |
Keywords | A1 Journal article; Condensed Matter Theory (CMT) | ||||
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Corporate Author | Thesis | ||||
Publisher | Place of Publication | Editor | |||
Language | Wos | A1992GV45100019 | Publication Date | 2005-03-26 | |
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 0722-3277;1434-6036; | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
Impact Factor | Times cited | 1 | Open Access | ||
Notes | Approved | no | |||
Call Number | UA @ lucian @ c:irua:44748 | Serial | 1276 | ||
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