Gas transport characteristics through a carbon nanotubule
Gas transport characteristics through a carbon nanotubule
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DOI：
10.1021/nl0350682
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发表时间：
2004-02-01
期刊：
影响因子：
10.8
通讯作者：
Roy, S
中科院分区：
文献类型：
--
作者：
Cooper, SM;Cruden, BA;Roy, S
我们报告的滑动系数的管状碳结构，已通过化学气相沉积在多孔氧化铝基板上的标称孔径为200 nm的第一次测定。在孔上形成均匀的20-30 nm厚的碳质涂层。然后使用压力/流量装置测量多孔氧化铝的渗透性。可调滑移边界条件的有限元代码被用来模拟通过氧化铝的运输。在不存在含碳材料的情况下，通过在壁处的漫反射很好地描述了运输。然而，当存在碳纳米管时，氩、氮和氧的切向动量调节系数为0.52 +/- 0.1。
We report the first determination of the slip coefficient for tubular carbon structures that have been produced by chemical vapor deposition on a porous alumina substrate with nominal pore diameters of 200 nm. A uniform 20-30 nm thick carbonaceous coating was formed over the pores. The permeability of the porous alumina was then measured using a pressure/flow apparatus. A finite element code with adjustable slip boundary conditions was used to model transport through the alumina. In the absence of a carbonaceous material, transport was well described by diffuse reflection at the wall. When a carbon nanotubule was present, however, a tangential-momentum accommodation coefficient, or,, of 0.52 +/- 0.1 was predicted for argon, nitrogen, and oxygen.