Synthesis of Plasmonic Nanocomposites for Diverse Applications

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 approximately 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.

Metal‐Polymer Nanocomposites for Functional Applications

“…The optical properties of such nanocomposites are currently of considerable interest, [11,[87][88][89] because other applications besides making colored glass are emergingsuch as sensing, [90] e.g., by single-molecule detection, [91] enhancement of nonlinear processes, [92] synthesis of materials with otherwise unavailable optical properties, e.g., materials with m r >> 1 at optical wavelengths, [93] and many more. Interest in plasmonic properties of nanocomposites for possible uses in integrated optical components and circuits [94,95] is also steadily growing.…”

Influence of SHI upon nanohole free volume and micro scale level surface modifications of polyethyleneterephthalate polymer films

“…The selectivity can be improved by doping the PET polymer with suitable metal nanoparticles. The synthesis of silver metal embedded PET polymernanocomposites has been reported in the literature [78][79][80]. The polymer-inorganic nanocomposites membranes have shown the higher gas permeabilities as well as improved selectivity compared to the corresponding pure polymer membranes [75].…”

SHI irradiation induced modifications of plasmonic properties of Ag-TiO2 thin film and study using FDTD simulation

“…Nanocomposite materials of metal nanoparticles in dielectric matrix are an important subject of research due to their multifunctional properties in various fields such as solar cells [1,2], photocatalysis [3][4][5], antibacterial activity [6,7], and plasmonics [8][9][10][11][12]. The material of nanoparticles and the matrix in which nanoparticles are embedded directly plays a major role in localized surface plasmon resonance (LSPR).…”