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Phys Rev Lett. 2008 Jun 13;100(23):236101. Epub 2008 Jun 9.

Tip-enhanced Raman spectroscopy and microscopy on single dye molecules with 15 nm resolution.

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1
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany.

Abstract

Our recently developed approach of UHV-tip-enhanced Raman spectroscopy permits us to acquire Raman spectra of a few single brilliant cresyl blue (BCB) molecules and even a single one adsorbed on a Au(111) surface. This is substantiated by simultaneously recorded STM images. Furthermore, because of the reduced photobleaching in UHV, the time frame for spectral acquisition is sufficiently extended to allow tip-enhanced Raman imaging of a single BCB molecule with a lateral resolution of 15 nm.

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