Effect of Carbon Concentration on Changing the Morphology of Titanium Carbide Nanoparticles from Cubic to Cuboctahedron
Effect of Carbon Concentration on Changing the Morphology of Titanium Carbide Nanoparticles from Cubic to Cuboctahedron
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DOI：
10.1021/nn9010413
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发表时间：
2010-01-01
期刊：
影响因子：
17.1
通讯作者：
Castleman, A. W., Jr.
中科院分区：
文献类型：
--
作者：
Grove, David E.;Gupta, Ujjwal;Castleman, A. W., Jr.
通过使甲烷流过由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来研究碳浓度对颗粒形态的影响。透射电子显微镜和X射线衍射仪对合成的纳米TiC粉体进行了表征，发现纳米TiC粉体在低甲烷浓度下呈立方结构，在高甲烷浓度下呈立方八面体结构。颗粒形态的变化归因于碳影响TiC晶种上{111}和{100}晶面的相对生长速率。
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.