Nano Archive

Ag nanoparticle sheet as a marker of lateral remote photocatalytic reactions

Nagahiro, Takeshi and Ishibashi, Kenichi and Kimura, Yasuo and Niwano, Michio and Hayashi, Tomohiro and Ikezoe, Yasuhiro and Harav, Masahiko and Tatsuma, Tetsu and Tamada, Kaoru (2009) Ag nanoparticle sheet as a marker of lateral remote photocatalytic reactions. nanoscale .

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Abstract

The lateral remote photocatalytic activity of TiO2 nanotubes fabricated by anodic oxidation, was characterized by use of a silver nanosheet as a marker. The silver nanosheet is a two-dimensional crystalline film composed of myristate-capped silver nanoparticles (d = 5 nm), which has a sharp localized plasmon absorption band at max = 470 nm. A quartz substrate was coated with TiO2 nanotubes to a coverage of 10% and then covered with a silver nanosheet. Upon UV irradiation a rapid decrease in the intensity of the 470 nm plasmon band and an increase in the long-wavelength absorption (550–1000 nm) band were clearly confirmed, indicating fusion of the nanoparticles due to decomposition of the myristate capping agent. Surface morphology measured by high-resolution scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed the decomposition and fusion of silver nanoparticles even in regions of the surface a micron away from the TiO2 nanotubes.

Item Type:Article
Subjects:Material Science > Nanochemistry
ID Code:7854
Deposited By:CSMNT
Deposited On:27 Nov 2009 16:01
Last Modified:27 Nov 2009 16:01

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