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Tip‐enhanced Raman scattering studies of histidine on novel silver substrates
Author(s) -
DeckertGaudig Tanja,
Deckert Volker
Publication year - 2009
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2359
Subject(s) - raman scattering , raman spectroscopy , histidine , homogeneous , adsorption , wavelength , substrate (aquarium) , chemistry , materials science , molecule , scattering , analytical chemistry (journal) , nanotechnology , optics , optoelectronics , chromatography , organic chemistry , physics , oceanography , thermodynamics , enzyme , geology
Tip‐enhanced Raman scattering (TERS) experiments of histidine immobilized on an atomically flat silver surface are presented. The substrate consists of silver nanoplates with a diameter of a few micrometers and a height about 20 nm. At such heights, the plates are still transparent to visible wavelengths, which is important for optimal illumination and detection. The Raman spectroscopic results strongly support a homogeneous adsorption of chemically different states of histidine on the silver surface. In addition, the influence of the silver surface and the TERS tip on the spectra of histidine is discussed with respect to the multiple coordination centers in the molecule. Copyright © 2009 John Wiley & Sons, Ltd.