Berlin 2008 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 21: Symposium Semiconductor Nanowires

HL 21.4: Invited Talk

Tuesday, February 26, 2008, 16:45–17:15, ER 270

From ordered arrays of nanowires to controlled solid state reactions — •Margit Zacharias — Faculty of Appl. Science (IMTEK), Albert Ludwigs University Freiburg, Georges-Koehler-Allee 103, 79110 Freiburg — formerly at: MPI of Microstructure Physics, Weinberg 2, 06120 Halle

There has been increasing interest in intentional synthesis of nanowires and nanotubes based on a large variety of materials. A deeper understanding and a sufficient control of growth are in the center of current research interest. Strategies for position-controlled and nano-patterned growth of nanowire arrays will be demonstrated by selected examples based on ZnO nanowires as well as discussed in terms of larger scale realization and future prospects.[1] The physical properties of single ZnO nanowires will be presented on selected examples.

Recently, we demonstrated one-dimensional free-standing spinel nanotubes which were transformed from nanowires via the Kirkendall effect in solid-state reaction.[2] We expect that the nanoscale Kirkendall effect should provide a general fabrication route to hollow nanostructures, including high aspect ratio nanotubes.[3] Such ordered arrays of spinel nanotubes may possess similar application potentials as carbon nanotubes.

[1] H.J. Fan, P. Werner, M. Zacharias, Small 2 (2006) 700.

[2] H.J. Fan, M. Knez, R. Scholz, E. Pippel, K. Nielsch, D. Hesse, M. Zacharias, U. Gösele, Nature Materials 5 (2006) 627.

[3] H.J. Fan, U. Gösele, M. Zacharias, Small 3 (2007) 1660.