Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-01-07
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15 pages, 4 figures. J. Phys. Chem. in press
Scientific paper
The high-bias electrical transport properties of suspended metallic single-walled carbon nanotubes (SWNTs) are investigated at various temperatures in vacuum, in various gases and when coated with molecular solids. It is revealed that non-equilibrium optical phonon effects in suspended nanotubes decrease as the ambient temperature increases. Gas molecules surrounding suspended SWNTs assist the relaxation of hot phonons and afford enhanced current flow along nanotubes. Molecular solids of carbon dioxide frozen onto suspended SWNTs quench the non-equilibrium phonon effect. The discovery of strong environmental effects on high current transport in nanotubes is important to high performance nanoelectronics applications of 1D nanowires in general.
Cao Jien
Dai* Hongjie
Goodson Kenneth
Mann David
Pop Eric
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