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O: Oberflächenphysik
O 15: Postersitzung (Adsorption an Oberfl
ächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Rastersondentechniken, Zeitaufgelöste Spektroskopie, Methoden)
O 15.19: Poster
Friday, March 4, 2005, 17:00–20:00, Poster TU D
Experimental study of the specific adsorption of DNA on the surface of ferroelectric crystals. — •Marc Tobias Wenzel — Institute of Applied Photophysics (IAPP), Dresden
At present, many research groups study the metallisation of DNA in order to use it as a conducting nanowire. For the integration into electronic systems, the DNA needs to be bound to contacts or surfaces.
Our intention is to clarify the mechanisms of adsorption of DNA at the surface of ferroelectric barium titanate BaTiO3 [100] and to investigate which effects the adsorption has on the properties of the DNA. For this purpose, 16 µ m long double-stranded lambda-DNA is deposited on the ferroelectric surface from an aqueous solution. The DNA is labelled by the selective yoyo-1 fluorescence dye for observation. Subsequently, the system is examined by scanning confocal microscopy and scanning force microscopy.
For the investigation of the interaction between the DNA and the charged surface of the ferroelectric, confocal Raman spectroscopy of the DNA is planned in the future.