I. KLEPS, M. DANILA, A. ANGELESCU, M. MIU, M. SIMION, T. IGNAT, A. BRAGARU
Gold/Si Nanocomposite Layers with Applications in Biology

Abstract.
The gold nanocrystallites orientation on nanocrystalline silicon substrate is of great interest for applications in biology; the Au(111)/nc-Si surface has a higher density of atoms comparatively with Au(100); this favors the attachment of a higher number of atoms and bio-molecules on the gold surface. In this paper the variation of the gold structural characteristics on different Si nanocomposite layers, as a function of temperature annealing are investigated by SIMS, SEM and X-ray diffraction methods. The attachment of the DNA fragments on the PCR microreactor surface functionalised using Au(111)/Si or Au(111)/PS nanocomposite layers, was found extremely efficient and uniform.

Keywords: Au(111), nanocomposite layers, porous silicon, X-ray diffraction.