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Interface Study of Metal Electrode and Semiconducting Carbon Nanotubes: Effects of Electrode Atomic Species

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3 Author(s)
Tarakeshwar, P. ; Korea Inst. for Adv. Study, Seoul ; Palacios, J.J. ; Kim, D.M.

Presented herein are the first-principle calculations of the transport and other pertinent electronic properties of metal contacted semiconducting carbon nanotubes (CNTs). The investigation is focused on elucidating access resistance as a function of the work function difference and the chemical nature of the metal atomic species. Our results show that, for simple end-contact geometries, the Fermi level position within the gap differs between palladium-contacted CNTs and gold-contacted CNTs. This is interesting since both of these metals possess similar work functions. The role of the metal-CNT coupling is examined in light of the resulting - behavior of the system.

Published in:

Nanotechnology, IEEE Transactions on  (Volume:7 ,  Issue: 2 )

Date of Publication:

March 2008

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