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Surface-enhanced Raman scattering at well-defined single crystalline faces of platinum-group metals induced by gap-mode plasmon excitation

Paper ID Volume ID Publish Year Pages File Format Full-Text
26723 43973 2011 6 PDF Available
Title
Surface-enhanced Raman scattering at well-defined single crystalline faces of platinum-group metals induced by gap-mode plasmon excitation
Abstract

It is normally difficult to use surface enhanced Raman scattering (SERS) to study molecular adsorbates at well-defined planar metal surfaces or at Pt-group catalytic metal surfaces. In this paper, highly localized gap-mode plasmons are excited on atomically smooth metal surfaces by using a sphere-plane type plasmonic cavity. This method enables us to observe Raman scattering signals from molecular adsorbates on various single crystalline metal surfaces including non-SERS-active Pt and Pd. SERS spectra of self-assembled isocyanide monolayers on several metal substrates with (1 1 1) or (1 0 0) orientation reveal a significant orientation dependence of preferential adsorption sites, which information is hardly obtainable from conventional SERS spectra.

► A sphere-plane plasmonic cavity is applied for SERS observation. ► This method enables us to observe SERS even at a highly damping Pt or Pd surface. ► This method provides us crystal orientation dependent SERS information. ► The advanced SERS technique is useful for studying metal–molecular interactions.

Keywords
Surface enhanced Raman scattering; Self-assembled monolayer; Platinum
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 221, Issues 2–3, 25 June 2011, Pages 175–180
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us