Growth of Gold Nanoparticle Arrays in TiO2 Mesoporous Matrices

Mª D. PÉREZ; E. OTAL; S. ALDABE-BILMES; G.J.A.A. SOLER-ILLIA; E. L CREPALDI; D. GROSSO; C. SANCHEZ

LANGMUIR

Año: 2004 vol. 20 p. 6879 - 6886

0743-7463

An interconnected Au nanoparticle arrangement is obtained by electrodeposition from Au(III) soluble complexes within the pore system of block-copolymer templated mesoporous titania films. The resulting Au@TiO2 nanocomposites (5 nm Au particles, 5.5 nm amorphous titania walls) have the electrochemical behavior of a gold electrode of high surface area. The attenuation of Au surface plasmon due to -OH electroadsorption and the existence of mixed localized states in theseAu@TiO2 nanocomposites are observed by in situ spectroelectrochemistry.2 nanocomposites (5 nm Au particles, 5.5 nm amorphous titania walls) have the electrochemical behavior of a gold electrode of high surface area. The attenuation of Au surface plasmon due to -OH electroadsorption and the existence of mixed localized states in theseAu@TiO2 nanocomposites are observed by in situ spectroelectrochemistry.-OH electroadsorption and the existence of mixed localized states in theseAu@TiO2 nanocomposites are observed by in situ spectroelectrochemistry.2 nanocomposites are observed by in situ spectroelectrochemistry.