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Surface-Enhanced Raman Scattering of Pyrazine at the Junction between Two Ag20 Nanoclusters
Abstract
In this work we present a detailed time-dependent density functional theory (TDDFT) investigation of the absorption and Raman spectra of a pyrazine molecule located at the junction between two Ag20 clusters. Surface-enhanced Raman scattering enhancements of the order of 10(6) have been found for the junction system, which are similar to enhancements of 10(5) found for individual silver nanoparticles. Surprisingly, the chemical enhancement is found to account for as much as 10(5), suggesting that this mechanism might be more important than previously believed, in particular for nanoparticle aggregates. Moreover, TDDFT calculations suggest that unlike larger nanoparticles, the junction between small Ag20 tetrahedral clusters does not provide an electromagnetic "hot spot".
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Cites
te Velde, G., Bickelhaupt, F. M., Baerends, E. J., Fonseca Guerra, C., van Gisbergen, S. J. A., Snijders, J. G., & Ziegler, T. (2001) · Journal of Computational Chemistry · doi:10.1002/jcc.1056 · Cited by 10,152
Raman spectra of pyridine adsorbed at a silver electrode
Fleischmann, M., Hendra, P. J., & McQuillan, A. J. (1974) · Chemical Physics Letters · doi:10.1016/0009-2614(74)85388-1 · Cited by 7,172
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Morton, S. M., Silverstein, D. W., & Jensen, L. (2011) · Chemical Reviews · doi:10.1021/cr100265f · Cited by 474
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Park, W.-H., & Kim, Z. H. (2010) · Nano Letters · doi:10.1021/nl102026p · Cited by 342
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Moskovits, M. (2013) · Physical Chemistry Chemical Physics · doi:10.1039/c2cp44030j · Cited by 295
Metadata
- Authors
- Zhao, L. L., Jensen, L., & Schatz, G. C.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-05-23
- Volume
- 6
- Issue
- 6
- Pages
- 1229-1234
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2085320170
- Cited by
- 221
- References
- 2
- FWCI
- 8.94
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zhao, L. L., Jensen, L., & Schatz, G. C. (2006). Surface-Enhanced Raman Scattering of Pyrazine at the Junction between Two Ag20 Nanoclusters. Nano Letters. https://doi.org/10.1021/nl0607378
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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