SILVER NANOPARTICLE METHOD ON ZINC OXIDE FILMS
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United States of America Patent
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Nov 7, 2017
Grant Date -
Nov 23, 2017
app pub date -
Jul 24, 2017
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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