I. KLEPS, M. MIU, M. DANILA, M. SIMION, T. IGNAT, A. BRAGARU, L. DUMITRU, G. TEODOSIU
Investigation of Silver-, Meso- and Nanoporous Silicon Composite Layers for Biomedical Applications


Abstract.
The study of the porous silicon (PS) structures is important for both fundamental understanding of nano-systems as well for its possible applications. In this paper various Ag/PS based composite layers were experimented in order to enlarge the PS applications, especially in biomedical field. The Ag nanoparticles/silicon nanocomposite layers as-deposited and thermal treated were investigated by optical microscopy, X-ray diffraction, and biological tests. Ag/PS layers can be used as a composite matrix for microelement delivery with application in homeopathy. On the other hand Ag nanoparticles on
nanocrystalline Si are important for their anti-microbial properties. In minute
concentrations, Ag is highly toxic to germs while relatively non-toxic to human cells. Microbes are unlikely to develop a resistance against silver, as they do against conventional and highly targeted antibiotics. The experimental results sustain the Ag/Si nanocomposite structures as anti-microbial matrix.

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