Attenuated total reflection and emission due to surface plasmon excitation of layer-by-layer ultrathin films containing azo-dye

Keizo Kato, Junichi Kawashima, Akira Baba, Kazunari Shinbo, Futao Kaneko, Rigoberto C. Advincula

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The properties of attenuated total reflection (ATR) and emission due to surface plasmon (SP) excitation were investigated for the alternate layer-by-layer ultrathin films self-assembled on Ag thin films using polycation (poly(diallyldimethylammonium chloride), PDADMAC) and azo-dye (Direct Red 80, DR80). The emission light had peaks at the same angles as the resonant angles of the ATR curves and the shapes of the emission spectra also corresponded to those of the ATR curves, and the emission was considered to be mainly due to the SP excitation mediated by the surface roughness of Ag thin films. The structure of the PDADMAC/DR80 layer-by-layer films was found to change due to the photoisomerization of DR80 molecules by the irradiation of polarized visible light, and the surface roughness of the layer-by-layer films was also found to increase by the irradiation and hardly to change after 5-min irradiation.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalThin Solid Films
Volume438-439
DOIs
Publication statusPublished - 2003 Aug 22
Externally publishedYes

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Keywords

  • Attenuated total reflection
  • Azo-dye
  • Emission
  • Layer-by-layer film
  • Photoisomerization
  • Scattered light
  • Surface plasmon excitation

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

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