Ag nanoparticle sheet as a marker of lateral remote photocatalytic reactions

Takeshi Nagahiro, Kenichi Ishibashi, Yasuo Kimura, Michio Niwano, Tomohiro Hayashi, Yasuhiro Ikezoe, Masahiko Hara, Tetsu Tatsuma, Kaoru Tamada

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 λmax = 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.

Original languageEnglish
Pages (from-to)107-113
Number of pages7
JournalNanoscale
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 8 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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  • Cite this

    Nagahiro, T., Ishibashi, K., Kimura, Y., Niwano, M., Hayashi, T., Ikezoe, Y., Hara, M., Tatsuma, T., & Tamada, K. (2010). Ag nanoparticle sheet as a marker of lateral remote photocatalytic reactions. Nanoscale, 2(1), 107-113. https://doi.org/10.1039/b9nr00240e