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HL: Halbleiterphysik

HL 46: Hybride Systeme

HL 46.1: Vortrag

Donnerstag, 27. März 2003, 14:30–14:45, BEY/154

Nanoscale attachment of proteins to semiconductor surfaces — •Karsten Goede, Peter Busch, Friedrich Kremer und Marius Grundmann — Faculty of Physics and Geosciences, Universität Leipzig, Germany

Self-organized hybrid nanostructures of anorganic semiconductors and organic molecules are being increasingly investigated. Understanding of the molecular attachment process is essential for possible future applications, such as bio-sensors and electronic or optoelectronic devices on a molecular basis. This work is focussed on the attachment of artificial proteins to various III-V and group-IV semiconductor surfaces on the nanometer scale. Tapping-mode atomic force microscopy and tunneling microscopy reveal clearly varying attachment properties of the different surfaces. These will be discussed with respect to chemical and structural properties of both the semiconductor and the protein. The dependence of the attachment result on the protein concentration in solution and the surface washing process will be demonstrated. Moreover, electron-transport properties of the protein-substrate system have been investigated.