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Synthesis of Plasmonic Nanocomposites for Diverse Applications

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Abstract:

We report the synthesis of gold and silver nanostructures embedded in different dielectric matrices by atom beam co-sputtering, a novel technique. We have synthesized gold–silicon core shell nanostructures and Au–ZnO nanocomposite with tunable surface plasmon resonance (SPR) by atom beam co-sputtering and subsequent annealing. The Au–ZnO nanocomposite shows significant enhancement in intensity of Raman modes of fullerene molecules and therefore can help in surface enhanced Raman spectroscopy investigation of organic molecules. The synthesized Ag–polymer nanocomposite thin films show excellent features of broad SPR absorption extending upto IR region and a narrow transmission of light in UV region ∼320 nm which could be of technological interest in solar absorbers and UV light filters respectively. The Ag–silica nanocomposite thin films show their utility in glucose sensing. The gold–silica nanocomposite thin films exhibit their possible use in detection of human ovarian cancer cells in a preliminary study. The shift in SPR peak of Au nanoparticles (NPs) present at the surface of silica synthesized by thermal evaporation and annealing, after attachment of biological molecules like proteins has been studied.

Keywords: NANOCOMPOSITES; NANOPARTICLES; SURFACE PLASMONS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.1433

Publication date: April 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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