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Issue 30, 2017
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Surface-enhanced Raman spectroscopy (SERS) in cultural heritage

Abstract

Surface-enhanced Raman spectroscopy (SERS) has been increasingly used in the last decade for the identification of organic colourants in works of art. ‘Surface-enhancement’ is the giant increase in Raman scattering intensity experienced by organic molecules adsorbed on atomically rough metallic surfaces. In the case of organic colourants, which are in general strongly luminescent under laser excitation and therefore cannot usually be identified by conventional Raman microscopy (see AMCTB no. 67), SERS yields a strong and clearly resolved spectrum, allowing for easy identification. Unlike ordinary Raman spectroscopy, SERS often requires sampling, yet the sample size is considerably smaller (from 20 to 100 micrometres) than that required for high-performance liquid chromatography (HPLC), the benchmark technique for organic colourants analysis. For this reason, SERS has seen substantial use in the analysis of works of art such as prints, drawings, paintings, and polychrome sculpture. This technical brief focuses on the practical aspects of SERS and its application to the analysis of cultural heritage material, as well as on its current limitations.

Graphical abstract: Surface-enhanced Raman spectroscopy (SERS) in cultural heritage

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Article information


Submitted
05 Jul 2017
First published
26 Jul 2017

Anal. Methods, 2017,9, 4338-4340
Article type
AMC Technical Brief

Surface-enhanced Raman spectroscopy (SERS) in cultural heritage

Analytical Methods Committee AMCTB No. 80 (Background paper), Anal. Methods, 2017, 9, 4338
DOI: 10.1039/C7AY90097J

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