Transient absorption of titanium dioxide sputtered film deposited on two-dimensionally assembled gold nanoparticles

摘要

Two-layer film of titanium dioxide and gold nanoparticles was deposited onto glass substrate, and its extinction spectrum and transient absorption were measured. The gold nanoparticles (AuNPs) were deposited on silane-treated glass by wet process, which showed enhancement of optical absorption due to its surface plasmon resonance (SPR). On the AuNP self-assembly, the titanium dioxide was deposited by magnetron sputtering. The absorption spectra in the region of 400-600 nm suggested that the red-shift of plasmon band of the AuNP due to surrounding in the TiO