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“Carbon-dot-decorated nanodiamonds”. Shenderova O, Hens S, Vlasov I, Turner S, Lu Y-G, Van Tendeloo G, Schrand A, Burikov SA, Dolenko TA, Particle and particle systems characterization 31, 580 (2014). http://doi.org/10.1002/ppsc.201300251
Abstract: The synthesis of a new class of fluorescent carbon nanomaterials, carbon-dot-decorated nanodiamonds (CDD-ND), is reported. These CDD-NDs are produced by specific acid treatment of detonation soot, forming tiny rounded sp2 carbon species (carbon dots), 12 atomic layers thick and 12 nm in size, covalently attached to the surface of the detonation diamond nanoparticles. A combination of nanodiamonds bonded with a graphitic phase as a starting material and the application of graphite intercalated acids for oxidation of the graphitic carbon is necessary for the successful production of CDD-ND. The CDD-ND photoluminescence (PL) is stable, 20 times more intense than the intrinsic PL of well-purified NDs and can be tailored by changing the oxidation process parameters. Carbon-dot-decorated DNDs are shown to be excellent probes for bioimaging applications and inexpensive additives for PL nanocomposites.
Keywords: A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT)
Impact Factor: 4.474
Times cited: 30
DOI: 10.1002/ppsc.201300251
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“Heating mode transition in a hybrid direct current/dual-frequency capacitively coupled CF4 discharge”. Zhang Q-Z, Wang Y-N, Bogaerts A, Journal of applied physics 115, 223302 (2014). http://doi.org/10.1063/1.4882297
Abstract: Computer simulations based on the particle-in-cell/Monte Carlo collision method are performed to study the plasma characteristics and especially the transition in electron heating mechanisms in a hybrid direct current (dc)/dual-frequency (DF) capacitively coupled CF 4 discharge. When applying a superposed dc voltage, the plasma density first increases, then decreases, and finally increases again, which is in good agreement with experiments. This trend can be explained by the transition between the four main heating modes, i.e., DF coupling, dc and DF coupling, dc source dominant heating, and secondary electron dominant heating.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.068
Times cited: 9
DOI: 10.1063/1.4882297
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“Splitting of CO2 by vibrational excitation in non-equilibrium plasmas : a reaction kinetics model”. Kozák T, Bogaerts A, Plasma sources science and technology 23, 045004 (2014). http://doi.org/10.1088/0963-0252/23/4/045004
Abstract: We present a zero-dimensional kinetic model of CO2 splitting in non-equilibrium plasmas. The model includes a description of the CO2 vibrational kinetics (25 vibrational levels up to the dissociation limit of the molecule), taking into account state-specific VT and VV relaxation reactions and the effect of vibrational excitation on other chemical reactions. The model is applied to study the reaction kinetics of CO2 splitting in an atmospheric-pressure dielectric barrier discharge (DBD) and in a moderate-pressure microwave discharge. The model results are in qualitative agreement with published experimental works. We show that the CO2 conversion and its energy efficiency are very different in these two types of discharges, which reflects the important dissociation mechanisms involved. In the microwave discharge, excitation of the vibrational levels promotes efficient dissociation when the specific energy input is higher than a critical value (2.0 eV/molecule under the conditions examined). The calculated energy efficiency of the process has a maximum of 23%. In the DBD, vibrationally excited levels do not contribute significantly to the dissociation of CO2 and the calculated energy efficiency of the process is much lower (5%).
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.302
Times cited: 170
DOI: 10.1088/0963-0252/23/4/045004
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“Phase modulation in pulsed dual-frequency capacitively coupled plasmas”. Wen D-Q, Zhang Q-Z, Jiang W, Song U-H, Bogaerts A, Wang Y-N, Journal of applied physics 115, 233303 (2014). http://doi.org/10.1063/1.4884225
Abstract: Particle-in-cell/Monte Carlo collision simulations, coupled with an external circuit, are used to investigate the behavior of pulsed dual-frequency (DF) capacitively coupled plasmas (CCPs). It is found that the phase shift θ between the high (or low) frequency source and the pulse modulation has a great influence on the ion density and the ionization rate. By pulsing the high frequency source, the time-averaged ion density shows a maximum when θ = 90∘. The time-averaged ion energy distribution functions (IEDFs) at the driven electrode, however, keep almost unchanged, illustrating the potential of pulsed DF-CCP for independent control of ion density (and flux) and ion energy. A detailed investigation of the temporal evolution of the plasma characteristics indicates that several high frequency harmonics can be excited at the initial stage of a pulse period by tuning the phase shift θ, and this gives rise to strong sheath oscillations, and therefore high ionization rates. For comparison, the pulsing of the low frequency source is also studied. In this case, the ion density changes slightly as a function of time, and the time-averaged ion density shows the same trend as in the HF modulation for different phase shifts θ. Moreover, the time-averaged IEDFs at the driven electrode can be modulated, showing the potential to reduce the maximum ion bombardment energy.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.068
Times cited: 8
DOI: 10.1063/1.4884225
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“A MoVI grafted metal organic framework : synthesis, characterization and catalytic investigations”. Leus K, Liu Y-Y, Meledina M, Turner S, Van Tendeloo G, van der Voort P, Journal of catalysis 316, 201 (2014). http://doi.org/10.1016/j.jcat.2014.05.019
Abstract: We present the post-modification of a gallium based Metal Organic Framework, COMOC-4, with a Mo-complex. The resulting Mo@COMOC-4 was characterized by means of N2 sorption, XRPD, DRIFT, TGA, XRF, XPS and TEM analysis. The results demonstrate that even at high Mo-complex loadings on the framework, no aggregation or any Mo or Mo oxide species are formed. Moreover, the Mo@COMOC-4 was evaluated as a catalyst in the epoxidation of cyclohexene, cyclooctene and cyclododecene employing TBHP in decane as oxidant. The post-modified COMOC-4 exhibits a very high selectivity toward the epoxide (up to 100%). Regenerability and stability tests have been carried out demonstrating that the catalyst can be recycled without leaching of Mo or loss of crystallinity.
Keywords: A1 Journal article; Electron microscopy for materials research (EMAT)
Impact Factor: 6.844
Times cited: 36
DOI: 10.1016/j.jcat.2014.05.019
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“Ocean-atmosphere interactions and oil pollution”. Van Grieken R, (1974)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Aerosol composition studies using accelerator proton bombardment”. Van Grieken R, (1974)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Trace metals in the St-Louis aerosol”. Winchester JW, Meinert DL, Nelson JW, Johansson TB, Van Grieken RE, Orsini C, Kaufmann HC, Akselsson R page 385 (1975).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Interpretation of aerosol trace metal particle size distributions”. Johansson TB, Van Grieken RE, Winchester JW page 356 (1975).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Energy-dispersive X-ray fluorescence for trace metals analysis of water”. Vanderborght B, Van Grieken R page 1 (1975).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Martime influences on the atmospheric aerosol composition”. Van Grieken R page 139 (1977).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Background aerosol concentrations at the Namib-Atlantic interface”. Annegarn HJ, Van Grieken RE, Winchester JW, Sellschop JPF, von Blottnitz F, (1979)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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Van Grieken R, Hoste J (1972) Annotated bibliography on 14 MeV neutron activation analysis. 293 p
Keywords: MA3 Book as author; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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Camuffo D, Pagan E, Schellen H, Van Grieken R, Bencs L, et al. (2006) Church heating and cultural heritage conservation : guide to the analysis of pros and cons of various heating systems. 240 p
Keywords: MA2 Book as author; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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Van Grieken R (1973) Analyse van ferro-metalen door activering met 14 MeV neutronen. 128 p
Keywords: MA3 Book as author; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Progress in Belgian oceanographic research : proceedings of symposium, Brussels, 3-5 March 1985”. Van Grieken R, Wollast R page 479 p. (1985).
Keywords: ME3 Book as editor; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Sulfur and heavy metals over the Atlantic Ocean : comparison with other marine data”. Maenhaut W, Selen A, van Espen P, Van Grieken R, Winchester JW, (1980)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Chemometrics (Mitac 3)
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“Selenium content and speciation in environmental waters determied by X-ray fluorescence spectroscopy”. Robberecht H, Van Grieken R page 362 (1980).
Keywords: H3 Book chapter; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“OPtimized selenite determination in environmental waters by X-ray fluorescence”. Robberecht H, Van Grieken R, Van der Sloot HA page 463 (1980).
Keywords: H3 Book chapter; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Selenium content of soils and rye grass (Lolium multiflorum) in Belgium”. vanden Berghe D, Deelstra H, Robberecht H, Van Grieken R page 85 (1981).
Keywords: H3 Book chapter; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Automated energy-dispersive X-ray fluorescence analysis for diverse environmental samples”. Van Dyck P, Van Grieken R page 315 (1982).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Energy-dispersive X-ray fluorescence for direct trace analysis of biomedical and environmental samples”. Van Grieken R, Robberecht H, Shani J, Van Dyck P, Vos L page 159 (1982).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Spark source mass spectrometry for trace analysis of diverse biological matrices”. Vos L, Van Grieken R page 303 (1983).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“LAMMA : calibration and application to nephrotoxicology studies”. Verbueken A, Paulus G, Van de Vyver F, Verpooten G, de Broe M, Van Grieken R, (1983)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Laboratory Experimental Medicine and Pediatrics (LEMP)
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“LAMMA in nephrotoxicity studies”. Verbueken AH, Paulus GJ, Van de Vyver FL, Verpooten GA, Visser WJ, de Broe ME, Van Grieken RE, (1984)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Laboratory Experimental Medicine and Pediatrics (LEMP)
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“Laser microprobe mass analysis (LAMMA) in nephrological investigations”. Verbueken AH, Van de Vyver FL, Paulus GJ, Visser WJ, Verpooten GA, de Broe ME, Van Grieken RE page 375 (1984).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Laboratory Experimental Medicine and Pediatrics (LEMP)
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“Speciation and distribution of sulfur and nitrogen in individual aerosol particles measured by LAMMA”. Bruynseels F, Van Grieken R, (1984)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Trace analysis of environmental samples by X-ray emission spectroscopy”. Van Grieken RE, LaBrecque JJ page 101 (1985).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Evaluation of different techniques used to determine aluminium in patients with chronic renal failure”. Visser WJ, Van de Vyver FL, Verbueken AH, d'Haese P, Bekaert AB, Van Grieken RE, Duursma SA, de Broe ME, (1985)
Keywords: P3 Proceeding; Pathophysiology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Laboratory Experimental Medicine and Pediatrics (LEMP)
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“Chemical characterization of individual aerosol particles from remote and polluted marine air”. Bruynseels F, Storms H, Van Grieken R, (1985)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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