Dresden 2003 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 21: Neue Materialien
HL 21.6: Vortrag
Dienstag, 25. März 2003, 12:45–13:00, BEY/118
Electrical Properties of Wet-Chemically Synthesised ZnO Nanorods — •Oliver Harnack1, Akio Yasuda1, Jurina M. Wessels1, Claudia Pacholski2, and Horst Weller2 — 1Materials Science Laboratories, Sony Corporate Laboratories Europe, Hedelfinger Str. 61, 70327 Stuttgart, Germany — 2Institute for Physical Chemistry, University Hamburg, Bundesstr. 45, 20146 Hamburg, Germany
We report on the electrical properties of wet-chemically synthesised ZnO nanorods that are potentially useful as interconnects and optical switches in future nanoelectronic circuits. The nanorod lengths and diameters were adjusted to about 200-300 nm and 15-30 nm, respectively. The nanorods were deposited onto electrode structures and directed into 130 nm to 800 nm wide electrode gaps by using alternating electrical fields at frequencies between 1 to 10 kHz and field strengths between 106 and 107 V/m. The nanorods align in parallel to the electrical field lines and make electrical contact to the gold electrodes. Clear photoresponse to 366 nm ultra-violet light irradiation could be demonstrated and relaxation times of a few milliseconds were measured. The current-voltage characteristics of the aligned rods are strongly non-linear, asymmetrical, and they show rectifying behaviour.
This work was partially funded by the European Commission through the IST-FET No-dqNanotechnology Information DevicesNo-dq initiative, BIOAND project IST-1999-11974.