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Confocal Micro-Raman Observation of Nanometer Thick Oxide Layers on Metal Nanoparticles

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Abstract:

It is shown for the first time that confocal micro-Raman spectroscopy can be used to detect metal oxide nanometer thick layers on metal nanoparticles. The measured frequencies of the observed oxide layers are shifted to lower frequencies and the line widths were asymmetrically broadened compared to Raman spectrum in bulk oxide of the metals. The effects are due to phonon confinement which occurs in materials of nanometer dimensions. Models of phonon confinement are used to estimate the thickness of the oxide layers.

Keywords: COPPER; INDIUM; METAL OXIDE NANOPARTICLES; OXIDE LAYERS; RAMAN SPECTROSCOPY; ZINC

Document Type: Short Communication

DOI: https://doi.org/10.1166/jnn.2005.104

Publication date: 2005-05-01

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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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