Electrical characterization of ZnO nanorods

Autor:	Thomas Weimann, A. C. Mofor, E. Schlenker, Andreas Waag, Andrey Bakin, B. Postels, Hergo-H. Wehmann, Peter Hinze
Rok vydání:	2007
Předmět:	Nanostructure Materials science business.industry Schottky diode Nanotechnology Substrate (electronics) Condensed Matter Physics Electronic Optical and Magnetic Materials Electrical resistivity and conductivity Electrode Optoelectronics Nanorod business Ohmic contact Electron-beam lithography
Zdroj:	physica status solidi (b). 244:1473-1477
ISSN:	1521-3951 0370-1972
Popis:	Zinc oxide (ZnO) nanorods were grown by a wet chemical approach and by vapor phase transport. To explore the electrical properties of individual nanostructures current-voltage (I-V) characteristics were obtained by using an atomic force microscope (AFM) with a conductive tip or by detaching the nanorods from the growth substrate, transferring them to an isolating substrate and contacting them with evaporated Ti/Au electrodes patterned by electron-beam lithography. The AFM-approach only yields a Schottky diode behavior, while the Ti/Au forms ohmic contacts to the ZnO. For the latter method the obtained I-V curves reveal a resistivity of the nanorods in the order of 10 -5 Q cm which is unusually low for undoped ZnO. We therefore assume the existence of a highly conductive surface channel.
Databáze:	OpenAIRE
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