Photo-induced growth of silver nanoparticles using UV sensitivity of cellulose fibers
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.
Keywords: Silver ; Nanoparticles ; UV irradiation ; Cellulose ; Surface-Plasmon Resonance ; Ag Nanoparticles ; Colloidal Silver ; Laser-Ablation ; Irradiation ; Particles ; Spectroscopy ; Aggregation ; Mechanisms ; Reduction
Record created on 2012-02-23, modified on 2016-08-09