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Multicolour Photochromic Response of Ag-TiO2 Nanocomposite—Role of Light Illumination

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Abstract:

Multicolour photochromism of Ag-TiO2 nanocomposite material was found several years ago but its microscopic origin is still ambiguous. We study the initial stages of the effect of light exposure on extinction spectrum of this material prepared by photocatalytic technique. We propose a simple model to analyse the experimental data that suggests that the extinction changes are due to a pure shift of the plasmon resonance of silver nanoparticles after light exposure. The homogeneous spectral widths (100–200 meV) of plasmon resonance of individual classes of nanoparticles were found to increase with the resonance frequency.

Keywords: PHOTOCHROMISM; SILVER NANOPARTICLES; TITANIUM DIOXIDE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.1396

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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