Spectroscopy and Photoelectrochemistry of Organic Monolayers within Sphere-Plane Gold Nano-Gaps

• IKEDA Katsuyoshi

  Division of Chemistry, Graduate School of Science, Hokkaido University

Abstract

Plasmonic field localization is normally utilized on irregularly roughened surfaces or nanostructured surfaces of coinage metals. Although localized fields increase photon-molecule interactions, metal-molecule interactions become an uncontrollable variable because atomic surface features are not organized in such nanostructured metals. However, construction of sphere-plane nano-gaps on atomically defined metal surface enables us to manage metal-molecular interactions in addition to control of plasmonic resonance features. In SERS spectroscopy using this system, well-managed electromagnetic and chemical contributions provide detailed information on geometric and electronic structures of molecular adsorbates. Moreover, highly localized fields within the nano-gaps extend the range of SERS application to highly damping catalytic metal surfaces. In photo-energy conversion, incident photon to current conversion efficiency in porphyrin-based molecular monolayer system is largely increased by optical antenna effect of the nano-gaps.

Journal

• Electrochemistry

  Electrochemistry 79 (10), 768-772, 2011

  The Electrochemical Society of Japan

Keywords

• Plasmon Resonances
• SERS
• Photo-Eenergy Conversion
• Single Crystal Surface

Details

• CRID: 1390001206495973504
• NII Article ID: 130002150468
• DOI: 10.5796/electrochemistry.79.768
• COI: 1:CAS:528:DC%2BC3MXhtleitrfF
• ISSN: 21862451
• ISSN: 13443542
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/79/10/79_10_768/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Allowed