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Santos JJ, Ivanov E, dos Santos DP, et al. Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations. Chemphyschem. 2016;17(4):463-7doi: 10.1002/cphc.201501051.
Santos, J. J., Ivanov, E., dos Santos, D. P., Toma, H. E., & Corio, P. (2016). Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations. Chemphyschem : a European journal of chemical physics and physical chemistry, 17(4), 463-7. https://doi.org/10.1002/cphc.201501051
Santos, Jonnatan J, et al. "Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations." Chemphyschem : a European journal of chemical physics and physical chemistry vol. 17,4 (2016): 463-7. doi: https://doi.org/10.1002/cphc.201501051
Santos JJ, Ivanov E, dos Santos DP, Toma HE, Corio P. Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations. Chemphyschem. 2016 Feb 16;17(4):463-7. doi: 10.1002/cphc.201501051. Epub 2016 Jan 06. PMID: 26670701.
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Chemphyschem. 2016 Feb 16;17(4):463-7. doi: 10.1002/cphc.201501051. Epub 2016 Jan 06.

Detection of Plasmon Coupling between Silver Nanowires Based on Hyperspectral Darkfield and SERS Imaging and Supported by DDA Theoretical Calculations.

Chemphyschem : a European journal of chemical physics and physical chemistry

Jonnatan J Santos, Evandro Ivanov, Diego P dos Santos, Henrique E Toma, Paola Corio

Affiliations

  1. Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitaria, Sao Paulo-SP, 05508000, Brazil.
  2. Institute of Chemistry, University of Campinas, Barao Geraldo, Campinas-SP, 13083970, Brazil.
  3. Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitaria, Sao Paulo-SP, 05508000, Brazil. [email protected].

PMID: 26670701 DOI: 10.1002/cphc.201501051

Abstract

We report the unprecedented observation of plasmon coupling between silver nanowires, showing how the surface-enhanced Raman scattering depends upon this interaction and how the spectrum can be shaped by the hot spot. Such observations were accomplished by Raman spectroscopy mapping of silver nanowires modified with rhodamine. The local spectra on the hot spots were measured by darkfield hyperspectral microscopy, a powerful but uncommonly used technique that is capable of determining the location, structure, and spectra of the hot spots. The result obtained by the simulation of two parallel nanowires based on the discrete dipole approximation (DDA) method was in excellent agreement with the results obtained experimentally.

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: DDA calculations; SERS; darkfield/hyperspectral microscopy; plasmon coupling; silver nanowires

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