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Göteborgs universitets publikationer

Atom collision-induced resistivity of carbon nanotubes

Författare och institution:
H E Romero (Institutionen för fysik (GU)); Kim Bolton (Institutionen för fysik (GU)); Arne Rosen (Institutionen för fysik (GU)); P C Eklund (-)
Publicerad i:
SCIENCE, 307 ( 5706 ) s. 89-93
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
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-1/3, where M is the mass of the colliding gas species (He, Ar, Ne, Kr, Xe, CH4, and N-2). 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-1/3 dependence. it appears that the transient deformation (or dent) in the tube wait may provide a previously unknown scattering mechanism needed to explain the atom collision-induced changes in the electrical transport.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Postens nummer:
Posten skapad:
2007-10-31 08:51
Posten ändrad:
2011-01-20 10:00

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