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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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.
|Subjects:||Material Science > Nanochemistry|
|Deposited On:||27 Nov 2009 16:01|
|Last Modified:||27 Nov 2009 16:01|
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