Abstract
Shape and size consistency of Ag nanoparticles is a challenging aspect when practical plasmonic devices are to be developed for their surface-specific activities. This study presents a simple chemical synthesis process which enables effective and rather uniform entrapment of Ag nanoparticles in dielectric oxide matrix at room temperature, without any assistance of physical/chemical agents. Uniformly distributed citrates capped Ag nanoparticles were preformed with a modified “Turkevich” approach and subsequently entrapped in mesoporous ZrO2 thin films. On the basis of transmission electron microscopy and photoelectron spectroscopy, results, size, shape, and chemical states of Ag nanoparticles were studied and correlated to the plasmonic properties of nanocomposite film formed by such entrapped nanoparticles. Plasmonic stability of these nanoparticles was confirmed in comparison of their dispersion on glass, and explained using extended Mie scattering theory.
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Acknowledgments
One of the authors (MK) acknowledges the “Senior Research Fellowship” from Council of Scientific and Industrial Research (HRD Group) India, obtained during the experiments of present work. Authors also acknowledge Mr. V.K. Khanna for TEM imaging and Dr. Deepak Varandani for AFM imaging of the samples.
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Kumar, M., Reddy, G.B. Stability-Inspired Entrapment of Ag Nanoparticles in ZrO2 Thin films. Plasmonics 11, 261–267 (2016). https://doi.org/10.1007/s11468-015-0044-x
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DOI: https://doi.org/10.1007/s11468-015-0044-x