Contact Conductivity of Uncapped Carbon Nanotubes Formed by Silicon Carbide Decomposition
Contact Conductivity of Uncapped Carbon Nanotubes Formed by Silicon Carbide Decomposition
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DOI：
10.1021/acs.jpcc.5b11815
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发表时间：
2016-03
影响因子：
3.7
通讯作者：
M. Inaba;C. Lee;Kazuma Suzuki;M. Shibuya;M. Myodo;Yukihiro Hirano;W. Norimatsu;M. Kusunoki;H. Kawarada
中科院分区：
文献类型：
--
作者：
M. Inaba;C. Lee;Kazuma Suzuki;M. Shibuya;M. Myodo;Yukihiro Hirano;W. Norimatsu;M. Kusunoki;H. Kawarada
了解碳纳米管的接触导电性将有助于碳纳米管在电子器件中的进一步应用，例如其沟道或电极由分散的碳纳米管制成的薄膜晶体管。在这项研究中，我们估计的接触导电性的CNT/CNT界面的面内导电性的SiC上的一个uncapped CNT森林。致密CNT森林的电性能的调查也是重要的，使其电气应用。碳化硅上的致密CNT森林通过其厚度归一化的面内电导率被测量为50 S/cm，这比CNT纱线的电导率低两到三个数量级。还发现CNT帽区和CNT体区都表现出面内导电性。碳纳米管的接触电导率估计从在体区域的面内电导率。密集的无帽碳纳米管森林可以近似为一个导电网格，其中每个导电分支对应于每个导电网格。
Understanding of the contact conductivity of carbon nanotubes (CNTs) will contribute to the further application of CNTs for electronic devices, such as thin film transistors whose channel or electrode is made of dispersed CNTs. In this study, we estimated the contact conductivity of a CNT/CNT interface from the in-plane conductivity of an uncapped CNT forest on SiC. Investigation of the electrical properties of dense CNT forests is also important to enable their electrical application. The in-plane conductivity of a dense CNT forest on silicon carbide normalized by its thickness was measured to be 50 S/cm, which is two to three orders of magnitude lower than the conductivity of a CNT yarn. It was also found that both the CNT cap region and the CNT bulk region exhibit in-plane conductivity. The contact conductivity of CNTs was estimated from the in-plane conductivity in the bulk region. Dense and uncapped CNT forest can be approximated by a conductive mesh, in which each conductive branch corresponds to th...