Carbon nanotube field-effect devices with asymmetric electrode configuration by contact geometry | Zendy

Peerapong Yotprayoonsak | Zendy; D. Talukdar | Zendy; M. Ahlskog | Zendy

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Carbon nanotube field-effect devices with asymmetric electrode configuration by contact geometry

Author(s) -

Peerapong Yotprayoonsak,

D. Talukdar,

M. Ahlskog

Publication year - 2014

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4880955

Subject(s) - electrode , carbon nanotube , materials science , palladium , electrical conductor , electrical contacts , nanotechnology , layer (electronics) , nanotube , contact geometry , composite material , chemically modified electrode , contact resistance , metal , optoelectronics , working electrode , geometry , electrochemistry , catalysis , chemistry , metallurgy , biochemistry , mathematics

We have studied experimentally the conductive properties of single walled carbon nanotube (SWNT) based field-effect type devices, with different contact geometries at the connecting electrode. The device designs are asymmetric with one end of the SWNT having the metal electrode deposited on top and immersing it, while at the other end, the SWNT is on top of the electrode. The devices were made with either gold or palladium as electrode materials, of which the latter resulted in different behavior of the different contact types. This is argued to be caused by the existence of a thin insulating layer of surface adsorbents on the palladium, possibly Pd5O4, the effect of which is enhanced by the 1D nature of the contact area in the configuration with SWNT on top of electrode.

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