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Browsing by Author "Oliphant, CJ"

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Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD

Author: Oliphant, CJ ; Arendse, CJ ; Malgas, GF ; Motaung, DE ; Muller, TFG ; Knoesen, D Date: Oct 2009 This paper reports on the deposition of crystalline single-helix carbon microcoils, in the as-deposited state, by the hot-wire chemical vapor deposition process without any special preparation of nano-sized transition metal catalysts and ... Read more
EBSD analysis of tungsten-filament carburization during the hot-wire CVD of multi-walled carbon nanotubes

Author: Oliphant, CJ ; Arendse, CJ ; Camagu, ST ; Swart, H Date: Feb 2014 Filament condition during hot-wire chemical vapor deposition conditions of multi-walled carbon nanotubes is a major concern for a stable deposition process. We report on the novel application of electron backscatter diffraction to characterize ... Read more
Filament poisoning at typical carbon nanotube deposition conditions by hot-filament CVD

Author: Oliphant, CJ ; Arendse, CJ ; Malgas, GF ; Motaung, DE ; Muller, TFG ; Halindintwali, S ; Julies, BA ; Knoesen, D Date: May 2009 This paper reports on the poisoning of tungsten filaments during the hot-filament chemical vapour deposition process at typical carbon nanotube (CNT) deposition conditions and filament temperatures ranging from 1400 to 2000 °C. The morphological ... Read more
Growth kinetics of nc-Si:H deposited at 200 °C by hot-wire chemical vapour deposition

Author: Oliphant, CJ ; Arendse, CJ ; Knoesen, D ; Muller, TFG ; Prins, S ; Malgas, GF Date: May 2011 The authors report on the growth kinetics of hydrogenated nanocrystalline silicon, with specific focus on the effects of the deposition time and hydrogen dilution on the nano-structural properties. The growth in the crystallite size, attributed ... Read more
Influence of thermal annealing on the morphology and structural properties of a conjugated polymer in blends with an organic acceptor material

Author: Motaung, DE ; Malgas, GF ; Arendse, CJ ; Oliphant, CJ ; Knoesen, D Date: Jun 2009 In this report, the influence of thermal annealing of thin P3HT films and P3HT:C60 composites were studied regarding their morphology and structural properties. Atomic force microscope measurements on P3HT films and P3HT:C60 composite disclose ... Read more
Structural evolution of a Ta-filament during hot-wire chemical vapour deposition of Silicon investigated by electron backscatter diffraction

Author: Oliphant, CJ ; Arendse, CJ ; Prins, SN ; Malgas, GF ; Knoesen, D Date: Mar 2012 In this study we investigate the structural changes of a burnt-out tantalum filament that was operated at typical hydrogenated nanocrystalline silicon synthesis conditions in our hot-wire chemical vapour deposition chamber. Scanning electron ... Read more
Thermal stability of the optical band gap and structural order in hot-wire-deposited amorphous silicon

Author: Arendse, CJ ; Malgas, G ; Oliphant, CJ ; Muller, TFG ; Knoesen, D Date: 2009 The material properties of hydrogenated amorphous silicon (a-Si:H) have been known to change when exposed to elevated temperatures. In this work researchers report on the thermal stability of the optical band gap and structural disorder in ... Read more
Thermal-induced changes on the properties of spin-coated P3HT:C60 thin films for solar cell applications

Author: Motaung, DE ; Malgas, GF ; Arendse, CJ ; Mavundla, SE ; Oliphant, CJ ; Knoesen, D Date: Sep 2009 The thermal transition behaviour, optical and structural properties of spin-coated P3HT:C60 blended films with different C60 ratios were investigated using differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA), ... Read more
Thermally induced nano-structural and optical changes of nc-Si:H deposited by hot-wire CVD

Author: Arendse, CJ ; Malgas, GF ; Muller, TFG ; Knoesen, D ; Oliphant, CJ ; Motaung, DE ; Mwakikunga, Bonex W Date: Apr 2009 This paper reports on the thermally induced changes of the nano-structural and optical properties of hydrogenated nanocrystalline silicon in the temperature range 200–700 °C. The as-deposited sample has a high crystalline volume fraction of ... Read more

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Browsing by Author "Oliphant, CJ"

Browsing by Author "Oliphant, CJ"

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All of ResearchSpace

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