Carbon nanotube field-effect devices with asymmetric electrode configuration by contact geometry
Yotprayoonsak, P., Talukdar, D., & Ahlskog, M. (2014). Carbon nanotube field-effect devices with asymmetric electrode configuration by contact geometry. Journal of Applied Physics, 115 (21), 214302. doi:10.1063/1.4880955
Published inJournal of Applied Physics
© 2014 AIP Publishing LLC. Published in this repository with the kind permission of the publisher.
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.