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          Institute: Fritz-Haber-Institut     Collection: Physical Chemistry     Display Documents



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ID: 269387.2, Fritz-Haber-Institut / Physical Chemistry
Direct monitoring of plasmon resonances in a tip-surface gap of varying width
Authors:Pettinger, Bruno; Domke, Katrin F.; Zhang, Dai; Schuster, Rolf; Ertl, Gerhard
Language:English
Date of Publication (YYYY-MM-DD):2007-09-21
Title of Journal:Physical Review B
Journal Abbrev.:Phys. Rev. B
Volume:76
Issue / Number:11
Start Page:113409–1
End Page:113409–4
Copyright:© 2007 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We have studied the dependence of tip-enhanced Raman (TER) spectra composed of discrete Raman lines and an intense Lorentzian-shaped background on varying interparticle distance. For increasing tip-sample separation, we observe a remarkable blueshift of the background maximum that is ascribed to an energy shift of the localized surface plasmon resonance. In addition, we report on a steep background and Raman band intensity decrease within 5–10 nm tip retraction that highlights the underlying near-field enhancement mechanism of TER spectroscopy.
Free Keywords:Raman spectra; spectral line shift; surface dynamics; surface plasmon resonance
External Publication Status:published
Document Type:Article
Communicated by:Gerhard Ertl
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Schuster R, Universitaet Karlsruhe, Inst Phys Chem, D-76128 Karlsruhe, Germany; Current address: Zhang D, Universitaet Tuebingen, Inst Phys & Theor Chem, Auf der Morgenstelle 8, D-72076 Tuebingen, Germany
Identifiers:URL:http://scitation.aip.org/getpdf/servlet/GetPDFServ... [only for subscriber]
DOI:10.1103/PhysRevB.76.113409
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