Nanotopographies originating from self organized processes at semiconductors are used for development of a Schottky-type nanoemitter solar cell and for immobilization of proteins on semiconductor surfaces. Using metal electrodeposition into nanopores formed in silicon oxide during oscillatory processes at silicon electrodes in fluoride containig solutions, photoelectrochemical solar cells that operate in the photovoltaic and photoelectrocatalytic mode have been realized. Presently, solar-to-electric conversion efficiencies are above 7%. Improvement strategies and development of solid state solar cells will be discussed.

Applications of electrochemically prepared nanotopographies on silicon for protein immobilization and subsequent detection using scanning probe microscopy will be presented. Also,scanning tunnelling microscopy images of enzymes such as reverse transcriptases deposited on nanostructures onto the layered semiconductor MoTe₂ will be presented and the charge transfer into and through the biological molecules will be discussed based on an energetically resonant injection mechanism and the hypothesis of hydration-induced detrapping of electrons along the energetic landscape of polypeptides.

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1. Adsorption of biomolecules on self-organized nanostructured semiconductor surfaces
2. Combined SRPES and SPM on selected Nanostructures on Silicon