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Surface enhanced Raman scattering in the near infrared using metal nanoshell substrates
Abstract
A metal nanoshell is a composite nanoparticle consisting of a dielectric core coated by a thin metal shell; its peak plasmon resonance wavelength is determined by the ratio of the core diameter to the shell thickness. When p-mercaptoaniline (p-MA) is in solution with gold nanoshells that have their plasmon resonance near a 1.06 μm excitation source, significant surface enhanced Raman scattering (SERS) is observed. The strongest Raman enhancements are obtained when enough gold is deposited on the silica cores to form a nearly complete metal shell. Correlations between transmission electron microscopy (TEM)-defined structure, ultraviolet (UV)-visible spectra, SERS signal strength, and electromagnetic theory show that the SERS signal is due to both the local enhancement of the dielectric field via the plasmon resonance of the nanostructure and to the localized regions of high field intensity provided by the nearly completed gold shell. Comparison with SERS enhancements on completed nanoshell structures indicates the relative contribution of these two effects.
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Citations
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
Beiträge zur Optik trüber Medien, speziell kolloidaler Metallösungen
Mie, G. (1908) · Annalen der Physik · doi:10.1002/andp.19083300302 · Cited by 11,537
Cited by
Photophysical, Photochemical and Photocatalytic Aspects of Metal Nanoparticles
Kamat, P. V. (2002) · The Journal of Physical Chemistry B · doi:10.1021/jp0209289 · Cited by 1,924
Wu, D.-Y., Liu, X.-M., Huang, Y.-F., Ren, B., Xu, X., & Tian, Z.-Q. (2009) · The Journal of Physical Chemistry C · doi:10.1021/jp9050929 · Cited by 311
Metadata
- Authors
- Oldenburg, S. J., Westcott, S. L., Averitt, R. D., & Halas, N. J.
- Venue
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Published
- 1999-09-08
- Volume
- 111
- Issue
- 10
- Pages
- 4729-4735
- ISSN
- 0021-9606 (ISSN-L)
- 1089-7690
- OpenAlex
- W1963786116
- Cited by
- 384
- References
- 2
- FWCI
- 7.71
- Type
- journal article
- Language
- en
- Open access
- closed
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- Oldenburg, S. J., Westcott, S. L., Averitt, R. D., & Halas, N. J. (1999). Surface enhanced Raman scattering in the near infrared using metal nanoshell substrates. The Journal of Chemical Physics. https://doi.org/10.1063/1.479235
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