Optically active metal nanoparticles have been of recent and broad interest because of their ability to enable high sensitivity enhancements in various optical detection techniques.Metal nanoparticle films directly attached at surfaces have the advantage of significant optical enhancement arising from small interparticle gaps (e.g. stable hot spots) Here, we report snytheis of metallic nanoparticles (Ag or Au) on a semiconductor thin films (Ge or Sn) that have uniform and controllable particle size distribution. The metallic nanoparticles are obtained by a simple redox procedure on the semiconductor surface. Controlling nanoparticle surface coatings in situ for molecular studies for Surface Enchanced Raman Spectroscopy and Whispering Galery Mode based photonic-plasmonic coupling at ultra-low concentrations (e.g. approaching to single molecule) will be reported.

Synthesis of metalic nanoparticles on semiconductor thin films

245th National Meeting (2013)

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