Tip enhanced Raman spectroscopy evidence for amorphous carbon contamination on gold surfaces

Abstract : We show that the origin of the spectral fluctuations frequently observed in tip enhanced Raman spectroscopy (TERS) experiments can be mainly related to the presence of surface-contaminating amorphous carbon- based species. We have monitored the spectral fluctuations originating from the sharp metallic tips used as apertureless near field probes, as well as from commonly used noble metal substrates. A correlation between the tip surface roughness and the carbon-based spectral fluctuations has been revealed. An Au-(1 1 1) bare substrate has been mapped with sub-wavelength resolution by TERS, evidencing the localization of the carbon contaminants on the surface steps and grain boundaries.
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https://hal-polytechnique.archives-ouvertes.fr/hal-00838001
Contributor : Gennaro Picardi <>
Submitted on : Monday, June 24, 2013 - 3:31:27 PM
Last modification on : Wednesday, March 27, 2019 - 4:20:03 PM

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Marc Chaigneau, Gennaro Picardi, Razvigor Ossikovski. Tip enhanced Raman spectroscopy evidence for amorphous carbon contamination on gold surfaces. Surface Science, Elsevier, 2010, 604, pp.701-705. ⟨10.1016/j.susc.2010.01.018⟩. ⟨hal-00838001⟩

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