Near-infrared surface-enhanced raman spectroscopy (NIR-SERS) for the identification of eosin Y: Theoretical calculations and evaluation of two different nanoplasmonic substrates

Nathan G. Greeneltch, Amber S. Davis, Nicholas A. Valley, Francesca Casadio, George C. Schatz, Richard P. Van Duyne, Nilam C. Shah

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

This work demonstrates the development of near-infrared surface-enhanced Raman spectroscopy (NIR-SERS) for the identification of eosin Y, an important historical dye. NIR-SERS benefits from the absence of some common sources of SERS signal loss including photobleaching and plasmonic heating, as well as an advantageous reduction in fluorescence, which is beneficial for art applications. This work also represents the first rigorous comparison of the enhancement factors and the relative merits of two plasmonic substrates utilized in art applications; namely, citrate-reduced silver colloids and metal film over nanosphere (FON) substrates. Experimental spectra are correlated in detail with theoretical absorption and Raman spectra calculated using time-dependent density functional theory (TDDFT) in order to elucidate molecular structural information and avoid relying on pigment spectral libraries for dye identification.

Original languageEnglish
Pages (from-to)11863-11869
Number of pages7
JournalJournal of Physical Chemistry A
Volume116
Issue number48
DOIs
Publication statusPublished - Dec 6 2012

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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