Records |
Author |
Smits, M. |
Title |
Photocatalytic degradation of diesel soot : from application to reaction mechanism |
Type |
Doctoral thesis |
Year |
2013 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
160 p. |
Keywords |
Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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ISBN |
978-90-5728-415-1 |
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UA library record |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:108803 |
Serial |
8380 |
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Author |
Borah, R. |
Title |
Photoactive nanostructures : from single plasmonic nanoparticles to self-assembled films |
Type |
Doctoral thesis |
Year |
2022 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
xxxiv, 220 p. |
Keywords |
Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
Photoactive nanoparticles and their light-driven applications have gained tremendous scientific attention towards remediation of the global environmental problems, meeting alternative energy demands, and other new technological discoveries. The research work presented in this dissertation includes a fundamental investigation of such nanoparticles to gain deeper insights that will ultimately benefit their application. In particular, the study of plasmonic metal nanoparticles and metal oxide nanoparticles for light driven applications is the major theme of this work. The investigation begins with isolated plasmonic Au and Ag nanoparticles, followed by a natural extension to nanoparticle clusters, and then further to nanoparticle films. Next, the application of such plasmonic nanoparticle films for gaseous phase sensing of volatile organic compounds is explored. Finally, the film formation of metal-oxide nanoparticles by self-assembly is investigated for the fabrication of photoactive functional interfaces. The fundamental theoretical investigation of the isolated plasmonic nanoparticles encompasses alloy and core-shell nanostructures of Au-Ag bimetallic compositions. First, the optical properties of bimetallic alloy and core-shell nanoparticles are compared for different structures such as nanospheres, nanotriangles and nanorods. Based on the optical properties, the photothermal properties of these nanostructures are also evaluated for relevant light-driven applications. Further, to bridge the gap between the theoretical and experimental optical properties of colloidal plasmonic nanoparticles, the effect of different statistical parameters pertaining to the particle size distribution is studied. Going from isolated nanoparticles to nanoparticle clusters, the changes in the optical properties of plasmonic nanoparticles when they form finite clusters is investigated. A strong effect of clustering on the absorption intensities of the nanoparticles and hence, on the photothermal properties is found. Next, for the study of plasmonic nanoparticle infinite arrays, Au and Ag nanoparticles films are experimentally obtained by the self-assembly at the air-ethylene glycol interface. Upon further validation of the computational models with the experimental optical properties of these films, the near-field and far-field optical response of the plasmonic nanoparticle arrays is investigated. An application of the self-assembled Au nanoparticle film is then demonstrated in the sensing of volatile organic compounds (VOCs). Finally, the focus is shifted from plasmonic nanoparticles to metal oxide nanoparticles for their self-assembly at the air-water interface to obtain self-assembled films. For this, the hydrophobic functionalization of four metal oxides nanoparticles namely, TiO2, ZnO, WO3 and CuO is investigated. The insights from this work is useful for the design and fabrication of functional nanoparticles and interfaces for light driven applications. |
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Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:189155 |
Serial |
7188 |
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Author |
Van Hal, M. |
Title |
Photo(electro)catalytic air purification and soot degradation with simultaneous energy recovery |
Type |
Doctoral thesis |
Year |
2021 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
XXXII, 203 p. |
Keywords |
Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
Today’s society is increasingly challenged by a range of urgent environmental problems. Air pollution is one of these pressing topics. This thesis will mainly focus on the degradation of volatile organic compounds (VOCs) and particulate matter (PM) – more specifically soot. A second globally urging topic is the quest for sustainable energy production. To simultaneously target both environmental problems, a photoelectrochemical (PEC) cell will be studied in this thesis, combining air purification and sustainable energy production in a single device. Photocatalysis is used at the anode of the PEC cell to drive the air purification process, while the energy contained in the degraded compounds is (partially) recovered at the cathode, either as H2 gas or electricity. The first two experimental chapters focus on the proof of concept of such an unbiased all-gas phase PEC cell targeting VOC degradation, using both TiO2- and WO3-based photocatalysts. In the two following experimental chapters the photocatalytic soot oxidation capacity of these TiO2- and WO3-based photocatalysts was studied. In the final experimental chapter the previously obtained results were combined, striving towards an efficient, sunlight-driven and soot-degrading waste gas-to-energy PEC cell. |
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Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:184521 |
Serial |
8378 |
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Author |
Brunekreef, B.; Janssen, N., A.H.; de Hartog, J., J.; Oldenwening, M.; Meliefste, K.; Hoek, G.; Lanki, T.; Timonen, K., L.; Vallius, M.; Pekkanen, J.; Van Grieken, R. |
Title |
Personal, indoor, and outdoor exposures to PM2.5 and its components for groups of cardiovascular patients in Amsterdam and Helsinki |
Type |
Minutes and reports |
Year |
2005 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
Minutes and reports; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:51816 |
Serial |
8374 |
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Author |
Buysse, C. |
Title |
Perovskite capillaries for gas separation in sustainable energy production |
Type |
Doctoral thesis |
Year |
2011 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
201 p. |
Keywords |
Doctoral thesis; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:90548 |
Serial |
8373 |
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Author |
Peeters, B.; Safdar, S.; Carlier, B.; Spasic, D.; Daems, D.; Lammertyn, J. |
Title |
PCR amplified DNAzyme-amplicons for generic solid-phase antimicrobial resistance screening |
Type |
P1 Proceeding |
Year |
2019 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
971-974
T2 - Transducers 2019 : Eurosensors XXXIII |
Keywords |
P1 Proceeding; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Fiber optic surface plasmon resonance (FO-SPR) has shown its potential for the detection of nucleic acids and more recently the technology has been combined with catalytic active strands such as DNAzymes. In this work, an innovative, generic solid-phase DNA sensor concept is presented, based on FO-SPR and PCR amplified DNAzyme activity. Improved levels of specificity and sensitivity were obtained down to picomolar concentrations. Moreover, the FO-SPR sensor concept enables AuNP amplified DNA target detection, independent of the target sequence length. The FO-SPR sensor was demonstrated for the screening of the mobile colistin resistance (MCR-2) gene, a gene important for the antimicrobial resistance in Gram-negative species such as E. Coli. |
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000539487000245 |
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UA library record; WoS full record |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:166108 |
Serial |
8367 |
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Author |
Verreydt, G.; Bronders, J.; van Keer, I.; Diels, L.; Vanderauwera, P. |
Title |
Passive samplers for monitoring VOCs in groundwater : prospects related to mass flux measurements |
Type |
P3 Proceeding |
Year |
2011 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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ISSN |
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ISBN |
978-1-907161-16-2 |
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UA library record |
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Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:110412 |
Serial |
8364 |
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Author |
Wegrzynek, D.; Van Grieken, R.; Eisma, D. |
Title |
Particle analysis of sediments from the Gulf of Lions, suspended matter from the Rhone river, and Sahara dust |
Type |
H3 Book chapter |
Year |
1994 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
51-60
T2 - Particles and particle-water interactio |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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no |
Call Number |
UA @ admin @ c:irua:9525 |
Serial |
8358 |
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Author |
Madani, M.; Bogaerts, A.; Gijbels, R.; Vangeneugden, D. |
Title |
Parametric study by means of numerical modelling for a dielectric barrier discharge at atmospheric pressure in nitrogen |
Type |
P3 Proceeding |
Year |
2004 |
Publication |
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Pages |
49-52 |
Keywords |
P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
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Place of Publication |
S.l. |
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0000-00-00 |
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Open Access |
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Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:82304 |
Serial |
2554 |
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Author |
Zou, H.; Krekels, T.; Van Tendeloo, G.; Wagener, G.; Buchgeister, M.; Hosseini, S.M.; Kopitzki, K. |
Title |
Oxygen ordering and critical temperature plateaus in ABa2Cu3O7-d (A=Er, Nd, Sm, Yb), pp |
Type |
P3 Proceeding |
Year |
1992 |
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Pages |
278-279 |
Keywords |
P3 Proceeding; Electron microscopy for materials research (EMAT) |
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Place of Publication |
Beijing |
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0000-00-00 |
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no |
Call Number |
UA @ lucian @ c:irua:4443 |
Serial |
2547 |
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Author |
Mitchell, T.E.; Gronsky, R.; Van Tendeloo, G. |
Title |
Oxide superconductors: electron microscopy |
Type |
H3 Book chapter |
Year |
1992 |
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Pages |
401-408 |
Keywords |
H3 Book chapter; Electron microscopy for materials research (EMAT) |
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Publisher |
Pergamon Press |
Place of Publication |
Oxford |
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0000-00-00 |
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no |
Call Number |
UA @ lucian @ c:irua:4435 |
Serial |
2543 |
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Author |
Janssens, K.; Adams, F. |
Title |
Overview |
Type |
H3 Book chapter |
Year |
2000 |
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Issue |
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Pages |
1-16 |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:27577 |
Serial |
5764 |
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Author |
Mozo, I.; Lacoste, L.; Aussenac, J.; De Cocker, P.; Vlaeminck, S.E.; Sperandio, M.; Caligaris, M.; Barillon, B.; Martin Ruel, S. |
Title |
Overcoming the challenges for mainstream deammonification on municipal wastewater in warm and cold areas |
Type |
P3 Proceeding |
Year |
2016 |
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Abbreviated Journal |
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Issue |
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Pages |
3 p.
T2 - 13th IWA Leading-Edge Conference on Wate |
Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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no |
Call Number |
UA @ admin @ c:irua:151137 |
Serial |
8351 |
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Author |
Nikolaev, A.V.; Michel, K.H.; Copley, J.R.D. |
Title |
Orientational disorder and order in C60-fullerite and in MC60-alkali metal fullerides |
Type |
H3 Book chapter |
Year |
1999 |
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Pages |
183-214 |
Keywords |
H3 Book chapter; Condensed Matter Theory (CMT) |
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Plenum Press |
Place of Publication |
New York |
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0000-00-00 |
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Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:28505 |
Serial |
2515 |
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Author |
Michel, K.H.; Copley, J.R.D. |
Title |
Orientation fluctuations, diffuse scattering and orientational order in solid C60 |
Type |
H3 Book chapter |
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1996 |
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381-384 |
Keywords |
H3 Book chapter; Condensed Matter Theory (CMT) |
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Publisher |
World Scientific |
Place of Publication |
Singapore |
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0000-00-00 |
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Approved |
COMPUTER SCIENCE, INTERDISCIPLINARY 11/104 Q1 # PHYSICS, MATHEMATICAL 1/53 Q1 # |
Call Number |
UA @ lucian @ c:irua:16358 |
Serial |
2512 |
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Author |
Robberecht, H.; Van Grieken, R.; Van der Sloot, H.A. |
Title |
OPtimized selenite determination in environmental waters by X-ray fluorescence |
Type |
H3 Book chapter |
Year |
1980 |
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463-468
T2 - Analytical techniques in environmenta |
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H3 Book chapter; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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no |
Call Number |
UA @ admin @ c:irua:117482 |
Serial |
8343 |
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Author |
Gonnissen, J. |
Title |
Optimal statistical experiment design for detecting and locating light atoms using quantitative high resolution (scanning) transmission electron microscopy |
Type |
Doctoral thesis |
Year |
2017 |
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Doctoral thesis; Electron microscopy for materials research (EMAT) |
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Place of Publication |
Antwerpen |
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Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:140612 |
Serial |
4444 |
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Author |
Barnes, D.J.; Nicholas, R.J.; Watts, M.; Peeters, F.M.; Wu, X.G.; Devreese, J.T.; Langerak, C.J.; Singleton, J.; Harris, J.J.; Foxon, C.T. |
Title |
Optically detected magnetophonon resonance in GaAs-GaAlAs heterojunctions |
Type |
P3 Proceeding |
Year |
1991 |
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P3 Proceeding; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
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Springer |
Place of Publication |
Berlin |
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0000-00-00 |
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Approved |
PHYSICS, APPLIED 47/145 Q2 # |
Call Number |
UA @ lucian @ c:irua:961 |
Serial |
2478 |
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Author |
Zhang, H. |
Title |
Optical diagnostics of spatiotemporal evolution characteristics of nanosecond laser-induced plasma in gases |
Type |
Doctoral thesis |
Year |
2020 |
Publication |
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Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
117 p. |
Keywords |
Doctoral thesis; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
Abstract |
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Wos |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Open Access |
|
Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:171436 |
Serial |
6572 |
Permanent link to this record |
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|
|
Author |
Callebaut, D.K.; Makarovska, Y. |
Title |
On the relationship between current and magnetic field in ring-filaments |
Type |
P1 Proceeding |
Year |
1998 |
Publication |
|
Abbreviated Journal |
|
Volume |
150 |
Issue |
|
Pages |
111-114
T2 - IAU Colloquium 167 on New Perspective |
Keywords |
P1 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
There is a type of filament that forms dosed contours encircling regions of one polarity of magnetic field, while the surrounding region has the opposite polarity One distribution of ring-filaments has sizes 2R = 40,000 to 160,000 km with the maximum around 100,000 km; the other distribution (with filaments and filament channels) has bigger sizes, with a maximum around 300,000 km. At low and mid latitudes the radial component B-rs (radial for the Sun) in the region outlined by filaments varies from 50 to 100 gauss, while the longitudinal component B-phi varies from 10 to 30 gauss. The total current inside the filament is 10(10) – 10(11) A, the ratio R/a approximate to 5 to 10, the magnetic flux crossing the surface is approximate to 10(21) – 10(22) MX; th, magnetic energy is approximate to 10(29) – 10(31) erg. Polar ring-filaments at latitudes 60 degrees-80 degrees are related to the polar magnetic field reversal and the quasi-flare processes at the poles during the field reversal. Correlation between B-rs and B-phi for the polar filament bands cannot be satisfactorily explained. A theoretical model using the conservation laws is used to study the relations between the various fields, currents, etc, of shrinking polar ring-filaments and their evolution. According to this theory ring-filaments should rise higher above the photosphere when shrinking. However, observations show that the height lowers. Presumably the discrepancy is due to the lack of dissipation in the model. |
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Wos |
000076565100020 |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
|
Edition |
|
ISSN |
1-886733-70-8 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
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Open Access |
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Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:95844 |
Serial |
8333 |
Permanent link to this record |
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|
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Author |
Schryvers, D.; Tanner, L.E. |
Title |
On the phase-like nature of the 7m structure in ni-al |
Type |
P1 Proceeding |
Year |
1994 |
Publication |
|
Abbreviated Journal |
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Volume |
|
Issue |
|
Pages |
849-852 |
Keywords |
P1 Proceeding; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
Abstract |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
Elsevier |
Place of Publication |
Amsterdam |
Editor |
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Language |
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Wos |
A1994BC69J00183 |
Publication Date |
0000-00-00 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
|
Series Volume |
18 |
Series Issue |
A B |
Edition |
|
ISSN |
0-444-81995-9 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
1 |
Open Access |
|
Notes |
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Approved |
|
Call Number |
UA @ lucian @ c:irua:95935 |
Serial |
2446 |
Permanent link to this record |
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|
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J. |
Title |
On the distinction between 16th and 17th century Venetian glass and façon-de-Venise glass |
Type |
H3 Book chapter |
Year |
2002 |
Publication |
|
Abbreviated Journal |
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Volume |
|
Issue |
|
Pages |
95-121 |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Address |
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Corporate Author |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Wos |
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Publication Date |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
|
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:40354 |
Serial |
5754 |
Permanent link to this record |
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|
|
Author |
Tavkhelidze, I.; Caratelli, D.; Gielis, J.; Ricci, P.E.; Rogava, M.; Transirico, M. |
Title |
On a geometric model of bodies with “complex” configuration and some movements |
Type |
H1 Book chapter |
Year |
2017 |
Publication |
|
Abbreviated Journal |
|
Volume |
2 |
Issue |
|
Pages |
129-158
T2 - Modeling in mathematics : proceedings |
Keywords |
H1 Book chapter; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
Aim of this chapter is analytical representation of one wide class of geometric figures (lines, surfaces and bodies) and their complicated displacements. The accurate estimation of physical characteristics (such as volume, surface area, length, or other specific parameters) relevant to human organs is of fundamental importance in medicine. One central idea of this article is, in this respect, to provide a general methodology for the evaluation, as a function of time, of the volume and center of gravity featured by moving of one class of bodies used of describe different human organs. |
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Place of Publication |
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Wos |
000442076400010 |
Publication Date |
2017-04-20 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
|
ISSN |
|
ISBN |
978-94-6239-260-1; 978-94-6239-261-8; 2543-0300; 978-94-6239-260-1 |
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:144552 |
Serial |
8326 |
Permanent link to this record |
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|
|
Author |
Van Grieken, R. |
Title |
Ocean-atmosphere interactions and oil pollution |
Type |
P3 Proceeding |
Year |
1974 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
|
Pages |
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Keywords |
P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Address |
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Corporate Author |
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Publisher |
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Place of Publication |
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Publication Date |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:117457 |
Serial |
8325 |
Permanent link to this record |
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|
|
Author |
Kanda, A.; Baelus, B.J.; Peeters, F.M.; Kadowaki, K.; Ootuka, Y. |
Title |
Observation of paramagnetic supercurrent in mesoscopic superconducting rings and disks using multiple-small-tunnel-junction method |
Type |
P1 Proceeding |
Year |
2005 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
204-209 |
Keywords |
P1 Proceeding; Condensed Matter Theory (CMT) |
Abstract |
Responses of mesoscopic superconducting rings and disks to perpendicular magnetic fields are studied by using the multiple-small-tunnel-junction method, in which transport properties of several small tunnel junctions attached to the sample are measured simultaneously. This allows us for a direct experimental observation of the paramagnetic supercurrent, which is closely related to the paramagnetic Meissner effect. The results are compared with numerical results based on the nonlinear Ginzburg-Landau theory. |
Address |
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Corporate Author |
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Publisher |
World Scientific |
Place of Publication |
Singapore |
Editor |
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Language |
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Wos |
000234363700032 |
Publication Date |
2007-11-30 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Additional Links |
UA library record; WoS full record |
Impact Factor |
|
Times cited |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:94758 |
Serial |
2419 |
Permanent link to this record |
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Author |
Anđelković, M. |
Title |
O(N) numerical methods for investigating graphene heterostructures and moiré patterns |
Type |
Doctoral thesis |
Year |
2019 |
Publication |
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Abbreviated Journal |
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Volume |
|
Issue |
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Pages |
207 p. |
Keywords |
Doctoral thesis; Condensed Matter Theory (CMT) |
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Place of Publication |
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Wos |
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Publication Date |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:165205 |
Serial |
6315 |
Permanent link to this record |
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Author |
Cong, S. |
Title |
Numerical study on low-pressure hollow cathode argon arc plasma |
Type |
Doctoral thesis |
Year |
2021 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
XIX, 126 p. |
Keywords |
Doctoral thesis; Philosophy; Educational sciences; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
Abstract |
The low-pressure hollow cathode discharge made of a hollow circular tube and an anode is a type of simple structure discharge system. In particular, under the arc discharge mode, hollow cathodes have high plasma density and energy density with a wide range of adaptability of pressure and current. Low-pressure hollow cathode arc (HCA) discharges have been widely used as plasma sources in various fields such as manufacturing, vacuum welding, and aerospace since the 1960s. Despite the early experimental and applied researches on low-pressure HCA discharges, the basic theoretical study was relatively lagged much behind, resulting in many unanswered questions, such as the optimal discharge operating parameters, the power deposition inside the cathode, the causes of plasma instability, and how to effectively reduce cathode erosion and so on. Due to the special discharge structure of the hollow cathode, it is difficult to make an accurate experimental diagnosis, so a reasonable numerical simulation is an effective study method. However, up to now, there is still a lack of complete and effective numerical models which can evaluate various physical fields in the low-pressure hollow cathode discharges. To address the above problems and difficulties, a comprehensive and self-consistent 2D multi-physical coupling numerical model based on a commercial program of finite element method, the COMSOL Multiphysics, was provided in this paper. The model involves plasma transport, arc flow and heat transfer, and cathode thermal equilibrium, and can consider the effect of an applied magnetic field. The processes of secondary electron emission, thermal-field electron emission, ions and backflow high-energy electrons bombardment, and thermal radiation from the cathode surface are considered in the cathode thermal equilibrium process. Based on the above background, this paper works from the following aspects: In Chapter 1, the basic concepts of low-pressure HCA discharge including the hollow cathode effect, the basic characteristics, and operation modes were introduced firstly; Secondly, the application fields, development history, and overseas and domestic research status of hollow cathode discharge were reviewed; finally, the problems were presented and the research background was explained, and the research purpose of this paper was clarified. In Chapter 2, a complete and self-consistent numerical model of low-pressure hollow cathode discharge was proposed based on the fundamental theory and assumptions, and the set of control equations and boundary conditions in the model were elaborated. In addition, the electron energy distribution function, the collision processes, the solving tools of this model, and calculation schemes were introduced in detail. Finally, a validation example was given to test the rationality and applicability of the numerical model. In Chapter 3, the fundamental plasma properties of low-pressure hollow cathode arcs were investigated. Firstly, the ion Joule heating effect was studied. The results showed that the temperature distributions of the arc and cathode are only able to approach the experimental measurements after considering the ion Joule heating, which shows that the Joule heating of ions is crucial for the heating of the arc plasma. Secondly, by comparing the radial distribution of electron and ion density inside the cathode, the structure of the cathode sheath could be simulated well using this model. Finally, it was shown that the thermal radiation from the cathode surface is an important cooling mechanism of the cathode and only under higher surface emissivity can balance the larger heat flow given by the plasma to the cathode, and the temperature distribution of the cathode shows a non-monotonic increasing trend and is consistent with the profile of experimental measurement so that the so-called active zone is formed. In Chapter 4, the power deposition in the low-pressure HCA was studied in simulation. Two main aspects were considered: the power deposition into particles (both electrons and heavy particles) and the power deposition onto the cathode. It was found that the deposited power into particles increases with the rise of discharge current, but there is no effect on the total power deposition onto the cathode. In high-density plasmas, Coulomb collisions between electrons and ions also become very important, especially since a portion of the deposition energy on heavy particles comes mainly from the energy transfer from electrons to ions. It was also found that regardless of external parameters, half of the power deposition onto the cathode always comes from the particle contribution, while the other half is the net contribution of heat transfer and cathode radiation. The HCA model also allows the simulation of multiple discharge modes for low-pressure HCA discharges over a wide range of gas flow rates. It was also shown that the discharge operating conditions and the external magnetic field can change the distribution of the particle flow on the cathode wall. In Chapter 5, the ion sputtering erosion process on the cathode was simulated by coupling the HCA numerical model with the moving grid technique. The results showed that the ion sputtering erosion on the cathode depends on the ion flux and the plasma potential near the cathode wall and that their distribution and magnitude jointly determine the erosion morphology of the cathode. It was also found that the location of the most severe erosion on the cathode is located in the region of the densest ion flux on the cathode wall, rather than in the longitudinal correspondence with the central region of the internal positive column (IPC). The external magnetic fields can mitigate the cathode erosion and reduce the erosion depth, but stronger magnetic fields lead to a concentration of current density at the cathode tip, which can enhance erosion slightly at the cathode outlet end. Finally, the conclusions and innovation highlights were summarized, and prospects for future work were discussed. |
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Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:178725 |
Serial |
8323 |
Permanent link to this record |
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Author |
Petrovic, D.; Martens, T.; De Bie, C.; van Dijk, J.; Brok, W.J.M.; Bogaerts, A. |
Title |
Numerical study on energy efficiency of a cylindrical dielectric barrier discharge plasma-chemical reactor |
Type |
P1 Proceeding |
Year |
2009 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
109 |
Keywords |
P1 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
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Publisher |
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Place of Publication |
S.l. |
Editor |
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Wos |
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Publication Date |
0000-00-00 |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Additional Links |
UA library record; WoS full record; |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:85694 |
Serial |
2412 |
Permanent link to this record |
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Author |
Stosic, D. |
Title |
Numerical simulations of magnetic skyrmions in atomically-thin ferromagnetic films |
Type |
Doctoral thesis |
Year |
2018 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
153 p. |
Keywords |
Doctoral thesis; Condensed Matter Theory (CMT) |
Abstract |
Moore’s Law has driven the electronics industry for the past half century. However, the doubling of transistors about every two years is beginning to break down, owing to fundamental limits that arise as they approach the atomic length. As a result, the search for new pathways for electronics has become crucial. Among potential candidates, the discovery of magnetic textures known as skyrmions has attracted considerable interest and attention in spintronic technology, which relies on both the electron charge and its spin. The unusual topological and particle-like behavior launched skyrmions into the spotlight of scientific research. Topological protected stability, nanoscale size, and low driving currents needed to move them make skyrmions promising candidates for future consumer nanoelectronics. Recent advances in the field have provided all of the basic functions needed for carrying and processing information. In this thesis, we procure to advance the current understanding of skyrmion physics, and explore their potential to replace conventional electronics technology. First, the fundamental properties and lifetimes of racetrack skyrmions at room temperature are investigated. We discover that skyrmions can easily collapse at the boundary in laterally finite systems, and propose ways to improve their stability for constrained geometries. Then, pinning of single skyrmions on atomic defects of distinct origins are studied. We reveal that the preferred pinning positions depend on the skyrmion size and type of defect being considered, and discuss applications where control of skyrmions by defects is of particular interest. Next, we explore other magnetic configurations that can compete with skyrmions when considering new materials, and describe a previously unseen mechanism for collapse of skyrmions into cycloidal spin backgrounds. Finally, switching and interactions between skyrmions with distinct topologies are reported. We find that skyrmions transition to higher or lower topologies by absorbing a unit spin texture. The interactions between skyrmions of different topological charges can be attractive or repulsive, leading to the formation of arranged clusters. We conclude with a numerical library for simulating magnetic skyrmions in various scenarios. |
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UA library record |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:181142 |
Serial |
8322 |
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Author |
Tinck, S. |
Title |
Numerical simulations of inductively coupled plasmas for applications in the microelectronics industry |
Type |
Doctoral thesis |
Year |
2011 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
Doctoral thesis; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
Abstract |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
Antwerpen |
Editor |
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Language |
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Wos |
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Publication Date |
0000-00-00 |
Series Editor |
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Abbreviated Series Title |
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Series Volume |
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Edition |
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ISBN |
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Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:92051 |
Serial |
2406 |
Permanent link to this record |