Transport properties for carbon nanotubes under hydrostatic pressure

F. Chen, Y. Y. Xue, K. L. Stokes, H. Wang, C. W. Chu

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

Multi-wall carbon nanotubes (MWNTs) were mixed with polystyrene (PS) by 20 wt%, which is slightly above the percolation threshold. Temperature (T) dependencies of Seebeck coefficient (5) and resistance (R) for the sample (MWNT-PS) were measured under hydrostatic pressure upto 1.2 GPa. The resistance at ambient pressure showed power law T-dependence (R α T ) and agreed well with Luttinger liquid (LL) model. The exponent α agrees well with the theory prediction and the experimental data of 'bulk-contacted' single-wall carbon nanotube (SWNT). The α increases slightly under high pressure, suggesting enhanced influence of Coulomb interactions. This could be due to either an increased Coulomb screening length or a reduced Fermi velocity under high pressure. The pressure also increases S slightly. The small magnitude and linearity of S versus T shows that the metallic behavior is kept below 1.2 GPa. The theoretical prediction of pressure-induced metal-insulator transition for SWNTs was not observed. Experiments on SWNT mixed in polycarbonate (PC) is under way.

原文English
主出版物標題2003 Nanotechnology Conference and Trade Show - Nanotech 2003
編輯M. Laudon, B. Romanowicz
頁面144-147
頁數4
出版狀態Published - 2003
事件2003 Nanotechnology Conference and Trade Show - Nanotech 2003 - San Francisco, CA, United States
持續時間: 2003 2月 232003 2月 27

出版系列

名字2003 Nanotechnology Conference and Trade Show - Nanotech 2003
1

Other

Other2003 Nanotechnology Conference and Trade Show - Nanotech 2003
國家/地區United States
城市San Francisco, CA
期間03-02-2303-02-27

All Science Journal Classification (ASJC) codes

  • 工程 (全部)

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