Method of preparing silver nanoparticles and silver nanorings
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United States of America Patent
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Aug 29, 2017
Grant Date -
Sep 1, 2016
app pub date -
Feb 26, 2015
filing date -
Feb 26, 2015
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Abstract
A method of preparing silver nanoparticles, including silver nanorings. A zinc oxide thin film is formed initially by direct-current sputtering of a zinc target onto a substrate. A silver thin film is then formed by a similar sputtering technique, of a silver target onto the zinc oxide thin film. After that, the silver thin film is subject to an annealing treatment. The temperature, duration and atmosphere of the annealing treatment can be varied to control the average particle size, average distance between particles (density), particle size distribution of the silver nanoparticles. In at least one embodiment, silver nanoparticles of ring structure are produced.
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