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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Poster: Interfaces and Thin Films

CPP 14.28: Poster

Montag, 22. März 2010, 16:30–18:00, Poster C

Functionalization of Nanostructures via Covalent Binding of Molecules — •Thomas Baumgärtel, Harald Graaf, and Christian von Borczyskowski — Center of Nanostructured Materials and Analytics, Institut für Physik, TU Chemnitz, 09107 Chemnitz, Germany

Anchoring functional molecules or nanoparticles to silicon substrates is a field of increasing interest as it can be employed to create tuneable and well-defined surfaces with various properties and functions. The formation of e.g. self-assembled monolayers of molecules on silicon or silicon oxide surfaces is a process which is basically understood and can be carried out using different chemical routes. However, if such a chemical surface functionalization is carried out in a multi-stage procedure on confined geometries, e.g. nanostructures, there are many problems to be dealt with. Amongst others it is desirable to anchor the molecules via covalent bonds which are much more stable compared to physisorption or electrostatic binding. We will report on the creation and functionalization of nanostructures on SAM-terminated silicon surfaces using different types of molecules and chemical routes. The nanostructures are produced by AFM-induced local anodic oxidation of the silicon. The generated structures are characterized by AFM and Kelvin Probe Force Microscopy. Nanostructures functionalized with optically active molecules or nanocrystals are additionally investigated using spectrally and temporally resolved confocal microscopy.