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期刊论文

Nanoscale Probing of Adsorbed Species by Tip-Enhanced Raman Spectroscopy

任斌Bruno Pettinger* Bin Ren Gennaro Picardi Rolf Schuster and Gerhard Ert

PHYSICAL REVIEW LETTERS 5 MARCH 2004 VOLUME 92, NUMBER 9,-0001,():

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摘要/描述

Tip-enhanced Raman spectroscopy (TERS) is based on the optical excitation of localized surfaceplasmons in the tip-substrate cavity, which provides a large but local field enhancement near the tipapex. We report on TERS with smooth single crystalline surfaces as substrates. The adsorbates wereCN ions at Au(111) and malachite green isothiocyanate (MGITC) molecules at Au(111) and Pt(110) using either Au or Ir tips. The data analysis yields Raman enhancements of about 4105 for CN andup to 106 for MGITC at Au(111) with a Au tip, probing an area of less than 100nm radius.

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