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

被引：29

作者：

Chaigneau, Marc ^{[1
]}

Picardi, Gennaro ^{[1
]}

Ossikovski, Razvigor ^{[1
]}

机构：

[1] Ecole Polytech, CNRS, LPICM, F-91128 Palaiseau, France

来源：

SURFACE SCIENCE | 2010年 / 604卷 / 7-8期

关键词：

Tip enhanced Raman spectroscopy (TERS); Scanning tunnelling microscopy (STM); Near-field optics; Au(111); Carbon contamination; SINGLE MOLECULES; SCATTERING; FLUCTUATIONS; SPECTRA; SERS; O-2;

D O I：

10.1016/j.susc.2010.01.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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-(111) 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. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：701 / 705

页数：5

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