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Tip‐enhanced Raman scattering: Small 4/2009
Author(s) -
DeckertGaudig Tanja,
Deckert Volker
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200990017
Subject(s) - raman scattering , raman spectroscopy , materials science , plasmon , optics , nanotechnology , optoelectronics , physics
Transparent gold crystals can act as ideal substrates for tip‐enhanced Raman spectroscopy. The cover picture shows the schematic setup using such gold crystals. Their typical thickness is less than 20 nm while the diameter is on the order of a few micrometers. The sample can be easily immobilized on the gold surface, which has a roughness well beyond 1 nm. The excitation light penetrates the gold plate and localized plasmons induced by the metal tip that acts as the main field‐enhancing site are generated, leading to a strong and localized Raman signal. The first experiments using cystine as a sample prove the viability of the concept and indicate at least two surface conformers of cystine on gold. For more information, please read the Communication “Ultraflat Transparent Gold Nanoplates: Ideal Substrates for Tip‐Enhanced Raman Scattering Experiments” by T. Deckert‐Gaudig and V. Deckert, beginning on page 432 .