Loading…
Atom Collision-Induced Resistivity of Carbon Nanotubes
We report the observation of unusually strong and systematic changes in the electron transport in metallic single-walled carbon nanotubes that are undergoing collisions with inert gas atoms or small molecules. At fixed gas temperature and pressure, changes in the resistance and thermopower of thin f...
Saved in:
Published in: | Science (American Association for the Advancement of Science) 2005-01, Vol.307 (5706), p.89-93 |
---|---|
Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | We report the observation of unusually strong and systematic changes in the electron transport in metallic single-walled carbon nanotubes that are undergoing collisions with inert gas atoms or small molecules. At fixed gas temperature and pressure, changes in the resistance and thermopower of thin films are observed that scale as roughly M[superscript 1/3], where M is the mass of the colliding gas species (He, Ar, Ne, Kr, Xe, CH₄, and N₂). Results of molecular dynamics simulations are also presented that show that the maximum deformation of the tube wall upon collision and the total energy transfer between the colliding atom and the nanotube also exhibit a roughly M[superscript 1/3] dependence. It appears that the transient deformation (or dent) in the tube wall may provide a previously unknown scattering mechanism needed to explain the atom collision-induced changes in the electrical transport. |
---|---|
ISSN: | 0036-8075 1095-9203 |
DOI: | 10.1126/science.1102004 |