Electromigrated nanoscale gaps for surface-enhanced Raman spectroscopy

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dc.creatorWard, D. R.
dc.creatorGrady, N. K.
dc.creatorLevin, C. S.
dc.creatorHalas, N. J.
dc.creatorWu, Y.
dc.creatorNordlander, P.
dc.creatorNatelson, D.
dc.date2007-04-03
dc.date.accessioned2026-07-07T09:22:09Z
dc.date.available2026-07-07T09:22:09Z
dc.descriptionSingle-molecule detection with chemical specificity is a powerful and much desired tool for biology, chemistry, physics, and sensing technologies. Surface-enhanced spectroscopies enable single molecule studies, yet reliable substrates of adequate sensitivity are in short supply. We present a simple, scaleable substrate for surface-enhanced Raman spectroscopy (SERS) incorporating nanometer-scale electromigrated gaps between extended electrodes. Molecules in the nanogap active regions exhibit hallmarks of very high Raman sensitivity, including blinking and spectral diffusion. Electrodynamic simulations show plasmonic focusing, giving electromagnetic enhancements approaching those needed for single-molecule SERS.
dc.description29 pages, 11 figures (includes supp. material)
dc.identifierhttps://arxiv.org/abs/0704.0451
dc.identifierhttp://arxiv.org/abs/0704.0451
dc.identifierNano Lett. 7, 1396-1400 (2007)
dc.identifierdoi:10.1021/nl070625w
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155278
dc.subjectMesoscale and Nanoscale Physics
dc.titleElectromigrated nanoscale gaps for surface-enhanced Raman spectroscopy
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