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Efficient Raman Enhancement and Intermittent Light Emission Observed in Single Gold Nanocrystals
Abstract
This paper reports two fundamental observations on the size-dependent optical properties of colloidal gold nanoparticles. First, faceted gold nanocrystals in the size range of 63 ± 3 nm have been found to be highly efficient for surface-enhanced Raman scattering (SERS). These nanocrystals are identified from a heterogeneous population for large optical enhancement at 647-nm laser excitation. Second, spatially isolated single gold particles emit Stokes-shifted Raman photons in an intermittent on-and-off fashion. In contrast to population-averaged studies, blinking surface-enhanced Raman scattering is a signature of single-particle (or even single-molecule) behavior. By directly measuring optical enhancement and time-resolved emission on single nanoparticles, this work opens new possibilities in studying the mechanisms of SERS, in developing metal tips for near-field optical microscopy, and in designing new nanostructured materials.
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Citations
Cited by
Ghosh, S. K., & Pal, T. (2007) · Chemical Reviews · doi:10.1021/cr0680282 · Cited by 2,782
In vivo tumor targeting and spectroscopic detection with surface-enhanced Raman nanoparticle tags
Qian, X., Peng, X.-H., Ansari, D. O., Yin-Goen, Q., Chen, G. Z., Shin, D. M., Yang, L., Young, A. N., Wang, M. D., & Nie, S. (2008) · Nature Biotechnology · doi:10.1038/nbt1377 · Cited by 2,201
Self-citationGold Nanorods: From Synthesis and Properties to Biological and Biomedical Applications
Huang, X., Neretina, S., & El‐Sayed, M. A. (2009) · Advanced Materials · doi:10.1002/adma.200802789 · Cited by 1,921
Song, J., Zhou, J., & Duan, H. (2012) · Journal of the American Chemical Society · doi:10.1021/ja305154a · Cited by 438
Metadata
- Authors
- Krug, J. T., Wang, G. D., Emory, S. R., & Nie, S.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-09-15
- Volume
- 121
- Issue
- 39
- Pages
- 9208-9214
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1985477303
- Cited by
- 355
- References
- 0
- FWCI
- 8.60
- Type
- journal article
- Language
- en
- Open access
- closed
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- Krug, J. T., Wang, G. D., Emory, S. R., & Nie, S. (1999). Efficient Raman Enhancement and Intermittent Light Emission Observed in Single Gold Nanocrystals. Journal of the American Chemical Society. https://doi.org/10.1021/ja992058n
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