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Structure−Activity Relationships in Gold Nanoparticle Dimers and Trimers for Surface-Enhanced Raman Spectroscopy
Open accessAbstract
Understanding the detailed relationship between nanoparticle structure and activity remains a significant challenge for the field of surface-enhanced Raman spectroscopy. To this end, the structural and optical properties of individual plasmonic nanoantennas comprised of Au nanoparticle assemblies that are coated with organic reporter molecules and encapsulated by a SiO(2) shell have been determined using correlated transmission electron microscopy (TEM), dark-field Rayleigh scattering microscopy, surface-enhanced Raman scattering (SERS) microscopy, and finite element method (FEM) calculations. The distribution of SERS enhancement factors (EFs) for a structurally and optically diverse set of nanoantennas is remarkably narrow. For a collection of 30 individual nanoantennas ranging from dimers to heptamers, the EFs vary by less than 2 orders of magnitude. Furthermore, the EFs for the hot-spot-containing nanoparticles are uncorrelated to aggregation state and localized surface plasmon resonance (LSPR) wavelength but are crucially dependent on the size of the interparticle gap. This study demonstrates that the creation of hot spots, where two particles are in subnanometer proximity or have coalesced to form crevices, is paramount to achieving maximum SERS enhancements.
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Cites
Optical Constants of the Noble Metals
Johnson, P. B., & Christy, R. W. (1972) · Physical Review B · doi:10.1103/physrevb.6.4370 · Cited by 20,094
Surface raman spectroelectrochemistry
Jeanmaire, D. L., & Van Duyne, R. P. (1977) · Journal of Electroanalytical Chemistry and Interfacial Electrochemistry · doi:10.1016/s0022-0728(77)80224-6 · Cited by 4,738
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Gold Nanomaterials at Work in Biomedicine
Yang, X., Yang, M., Pang, B., Vara, M., & Xia, Y. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00193 · Cited by 1,162
Quantum mechanical effects in plasmonic structures with subnanometre gaps
Zhu, W., Esteban, R., Borisov, A. G., Baumberg, J. J., Nordlander, P., Lezec, H. J., Aizpurua, J., & Crozier, K. B. (2016) · Nature Communications · doi:10.1038/ncomms11495 · Cited by 820
Guerrini, L., & Graham, D. (2012) · Chemical Society Reviews · doi:10.1039/c2cs35118h · Cited by 441
Song, J., Zhou, J., & Duan, H. (2012) · Journal of the American Chemical Society · doi:10.1021/ja305154a · Cited by 438
Taylor, R. W., Lee, T.-C., Scherman, O. A., Esteban, R., Aizpurua, J., Huang, F. M., Baumberg, J. J., & Mahajan, S. (2011) · ACS Nano · doi:10.1021/nn200250v · Cited by 355
Metadata
- Authors
- Wustholz, K. L., Henry, A.-I., McMahon, J. M., Freeman, R. G., Valley, N., Piotti, M. E., Natan, M. J., Schatz, G. C., & Van Duyne, R. P.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-07-21
- Volume
- 132
- Issue
- 31
- Pages
- 10903-10910
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2034561752
- Cited by
- 787
- References
- 2
- FWCI
- 27.07
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Wustholz, K. L., Henry, A.-I., McMahon, J. M., Freeman, R. G., Valley, N., Piotti, M. E., Natan, M. J., Schatz, G. C., & Van Duyne, R. P. (2010). Structure−Activity Relationships in Gold Nanoparticle Dimers and Trimers for Surface-Enhanced Raman Spectroscopy. Journal of the American Chemical Society. https://doi.org/10.1021/ja104174m
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