화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.159, No.6, K161-K164, 2012
Electrochemical and Optical Properties of ZnO Nanowires Modified with Ag Nanoparticles by Electrodeposition
The electrochemical and optical properties of ZnO nanowires modified with Ag nanoparticles by electrodeposition are studied. The results of cyclic voltammetry and chronoamperometry show that the radiated, well-crystallized ZnO-nanowire electrode, with a spacial architecture, allows fast Ag(I) ion diffusion, rapid electron transfer, and high Ag deposition rate. Numerous Ag nanoparticles deposited on the nanowires induce a redshift of 0.23 eV in the ZnO optical bandgap while without causing a large decrease in optical absorption intensity. However, a great decrease in photoluminescence intensity occurs in the modified structure, mainly resulting from the charge transfer between ZnO and Ag. The composite structure has promising applications in photocatalysis and photovoltaics.