Abstract
We developed a new method for the fabrication of gold nanoparticles (AuNps) in a poly(vinyl alcohol) film using a two-color two-laser irradiation. The benzophenone ketyl radical (BPH ) in the excited state (BPH (D 1)) was used as a reducing agent. Although BPH in the ground state also reduced AuCl 4 - to produce AuNps, the formation of AuNp was significantly enhanced by the BPH (D 1) generated by the two-color two-laser irradiation. Because the electron transfer from the BPH (D 1) to AuCl 4 - enhanced the formation of AuNps.
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