Publications in Scientific Journals:
F. Hernandez-Ramirez, A. Tarancon, O. Casals, J. Rodriguez, A. Romano-Rodriquez, J. Morante, S. Barth, S. Mathur, T. Choi, D. Poulikakos, V. Callegari, P. Nellen:
"Four- probe Measurements and Impedance Spectroscopy of Individual SnO2 Nanowires";
Nanotechnology,
17
(2006),
22;
5577
- 5583.
English abstract:
Two- and four-probe electrical measurements on individual tin oxide (SnO2) nanowires were performed to evaluate their conductivity and contact resistance. Electrical contacts between the nanowires and the microelectrodes were achieved with the help of an electron- and ion-beam-assisted direct-write nanolithography process. High contact resistance values and the nonlinear current-bias (I-V) characteristics of some of these devices observed in two-probe measurements can be explained by the existence of back-to-back Schottky barriers arising from the platinum-nanowire contacts. The nanoscale devices described herein were characterized using impedance spectroscopy, enabling the development of an equivalent circuit. The proposed methodology of nanocontacting and measurements can be easily applied to other nanowires and nanometre-sized materials.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1088/0957-4484/17/22/009
Created from the Publication Database of the Vienna University of Technology.