4.7 Article

Photo-induced growth of silver nanoparticles using UV sensitivity of cellulose fibers

Journal

APPLIED SURFACE SCIENCE
Volume 258, Issue 7, Pages 2373-2377

Publisher

ELSEVIER
DOI: 10.1016/j.apsusc.2011.10.038

Keywords

Silver; Nanoparticles; UV irradiation; Cellulose

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A simple method has been demonstrated to grow silver nanoparticles on the surface of cellulose fibers. The preparation is based on photo-activation of surface by ultraviolet (UV) photons, followed by chemical reduction of silver nitrate. It is found that the concentration of silver nitrate in the solution is not a determining factor, while UV intensity affects the rate of initial growth and determines the final concentration of the loaded silver. We explain the phenomena based on a model including the number of reducing sites on the surface of cellulose fibers activated by UV photons, and a release mechanism that causes a slow rate of dissolution of silver back into the solution. (C) 2011 Elsevier B.V. All rights reserved.

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