Department of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
ACS Nano. 2010 Jan 26;4(1):49-54. doi: 10.1021/nn9010413.
Titanium carbide nanoparticles were synthesized by flowing methane through a plasma generated from an arc discharge between two titanium electrodes. Different methane concentrations were employed in studies made to investigate the effects of carbon concentration on particle morphology. Transmission electron microscopy and X-ray diffraction were used to investigate the synthesized TiC nanopowders, whereupon it was found that nanocrystalline TiC nanoparticles prefer a cubic morphology at low concentrations of methane and a cuboctahedron morphology at high concentration of methane. The change in particle morphology is attributed to carbon affecting the relative growth rates of the {111} and {100} facets on a TiC seed crystal.
采用甲烷作为碳源，通过在两个钛电极之间的电弧放电产生的等离子体来合成碳化钛纳米颗粒。在研究中采用了不同的甲烷浓度，以研究碳浓度对颗粒形态的影响。使用透射电子显微镜和 X 射线衍射对合成的 TiC 纳米粉末进行了研究，结果发现，在甲烷浓度较低时，纳米晶 TiC 纳米颗粒呈立方形态，而在甲烷浓度较高时，呈立方八面体形态。颗粒形态的变化归因于碳对 TiC 晶种上{111}和{100}面的相对生长速率的影响。
