Towards atomic site-selective sensitivity in tip-enhanced Raman spectroscopy

Hayazawa, Norihiko; Watanabe, Hiroyuki; Saito, Yuika; Kawata, Satoshi
December 2006
Journal of Chemical Physics;12/28/2006, Vol. 125 Issue 24, p244706
Academic Journal
Depending on each nitrogen atom of adenine molecule to which a silver atom of a metallic tip approaches, tip-enhanced near-field Raman spectroscopy may show a potential to achieve atomic site-selective detection sensitivity. Molecular vibrational calculations show that silver atoms and adenine molecule create several isomers generating specific vibrational modes of each isomer that are shifted or not observable in isolated adenine molecule itself. Here, the authors observe the specific vibrational modes and spectral shifts of isomers experimentally and are in good agreement with their calculations.


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