Abstract
Silver nanoparticles have been found many interesting applications, such as absorption amplifiers in dye-sensitized solar cells. However, silver nanoparticles are easily oxidized. In order to protect silver nanoparticles, atomic layers of TiO2 were deposited onto silver nanoparticles coated to a glass slide. Then the glass slide was exposed to corrosive I−/I3− solutions, and the degree of silver etching was measured via scanning electron microscopy (SEM) and ultraviolet-visible spectroscopy (UVS). It was found that 3 nm (30 cycles) of Al2O3 with 9 nm of (90 cycles) TiO2 could completely protect silver nanoparticles from oxidization.
© 2011 Optical Society of America
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