Nano Science and Technology InstituteNano Science and Technology Institute
Nano Science and Technology Institute 2003 NSTI Nanotechnology Conference & Trade Show
Nanotech 2003
BioNano 2003
Program
Sunday
Monday
Tuesday
Wednesday
Thursday
Index of Authors
2003 Sub Sections
Proceedings
Organization
Press Room
Sponsors
Exhibitors
Venue
Organizations
NSTI Events
Subscribe
Site Map
 
Nanotech Proceedings
Nanotechnology Proceedings
Supporting Organizations
Supporting Organizations
Event Contact
696 San Ramon Valley Blvd., Ste. 423
Danville, CA 94526
Ph: (925) 353-5004
Fx: (925) 886-8461
E-mail:
 
 

Transport Properties For Carbon Nanotubes Under Hydrostatic Pressure

F. Chen, Y. Y. Xue, C. W. Chu, K. L. Stokes and H. Wang
University of Houston, US

Keywords: carbon nanotube, high pressure, thermoelectric, transport, Luttinger liquid

Abstract:
Multi-wall carbon nanotubes (MWNTs) were mixed with polystyrene (PS) by 20 wt%, which is close to the percolation threshold. Temperature (T) dependence of Seebeck coefficient (S) and resistance (R) for the sample (MWNT-PS) were measured under hydrostatic pressure upto 1.2 GPa. The resistance showed power law behavior versus temperature (R ~ T^alpha) and agreed well with Luttinger liquid (LL) model. The power law coefficient alpha agreed well with the theory prediction for CNT with Coulomb interactions and the experimental data of `bulk-contacted' single-wall carbon nanotube (SWNT). Alpha increased slightly under high pressure, suggesting enhanced influence of Coulomb interactions under high pressure. This could be due to either increased Coulomb screening radius or reduced Fermi velocity under high pressure. The pressure increased S slightly. The small magnitude and linearity of S versus T showed metallic behavior under all our experimental pressures. The theoretical prediction of pressure-induced metal-insulator transition for SWNTs was not able to be confirmed by this experiment. Experiments on SWNT mixed in polycarbonate (PC) will be conducted to testify the theoretical prediction.

NSTI Nanotech 2003 Conference Technical Program Abstract

 
Featured Sponsors
Nanotech Sponsors
News Headlines
NSTI Online Community
 
 

© Nano Science and Technology Institute, all rights reserved.
Terms of use | Privacy policy | Contact