Regensburg 2004 – scientific programme

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HL: Halbleiterphysik

HL 12: Poster I

HL 12.93: Poster

Monday, March 8, 2004, 16:30–19:00, Poster A

Micro- and nanotubes made of strained metal/semiconductor double layers — •Olrik Schumacher, Stefan Mendach, Christian Heyn, Holger Welsch, and Wolfgang Hansen — Institut für Angewandte Physik, Universität Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany

The method of self-rolling strained semiconductor double layers first introduced by Prinz [1] enables to build tubes with radii varying between some nanometers and some microns. Here we show that by choosing adequate preparation parameters it is also possible to roll metal/semiconductor double layers into micro- and nanotubes. By evaporating metals with different layer thicknesses onto InGaAs-layers we achieve strained double layers resulting in tubes with tuneable diameter. The dependence between diameter and layer composition as well as the rolling anisotropy will be shown and compared to conventional semiconductor tubes. Furthermore possible applications will be discussed.

[1] V. Ya. Prinz et al., Physica E6 (2000) 828-831.