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Electromigrated Nanoscale Gaps for Surface-Enhanced Raman Spectroscopy

Open access
Ward, Daniel R., Grady, Nathaniel K., Levin, Carly S., Halas, Naomi J., Wu, Yanpeng, Nordlander, Peter, Natelson, Douglas·2007·Nano Letters

Abstract

Single-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.

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Metadata

Authors
Ward, D. R., Grady, N. K., Levin, C. S., Halas, N. J., Wu, Y., Nordlander, P., & Natelson, D.
Venue
Nano Letters
Published
2007-04-13
Volume
7
Issue
5
Pages
1396-1400
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W1980501859
Cited by
314
References
0
FWCI
10.62
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Electromigrated Nanoscale Gaps for Surface-Enhanced Raman Spectroscopy. https://app.cochat.ai/papers/10.1021/nl070625w
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Ward, D. R., Grady, N. K., Levin, C. S., Halas, N. J., Wu, Y., Nordlander, P., & Natelson, D. (2007). Electromigrated Nanoscale Gaps for Surface-Enhanced Raman Spectroscopy. Nano Letters. https://doi.org/10.1021/nl070625w

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