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Effect of Interparticle Field Enhancement in Self-Assembled Silver Aggregates on Surface-Enhanced Raman Scattering

Plasmonics volume 9, pages 993–999 (2014)Cite this article

Abstract

The presence of so-called hot spots, regions with strongly enhanced electromagnetic field, is a critical property of a substrate enabling detection of surface-enhanced Raman scattering (SERS) signals at high enhancement levels. In this work, the effect of interparticle field enhancement on SERS signals was investigated comparing SERS spectra of ethylenediaminetetraacetic-disodium salt in the chemically produced colloids with isolated and aggregated silver nanoparticles using 473 and 532-nm wavelength excitation. The presence of aggregates in the colloidal solution resulted in SERS spectra that were insensitive to wavelength excitation and much richer in structural information and of higher resolution than the corresponding SERS spectra for the colloid with isolated nanoparticles. The experimental SERS spectra were found to be consistent with the finite-difference time-domain simulation results that explored the electromagnetic response of the isolated and aggregated nanoparticles. These results provide more evidence to suggest that the aggregate formation offers favorable electromagnetic properties increasing sensitivity of Raman spectroscopy.

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Acknowledgments

This work was supported by the Belarusian Scientific Research Program “Electronics and Photonics” (project 1.1.02). One author (PG) acknowledged the support of a Marie Curie Foundation within the 7th FP (project no. 298932, call reference: FP7-PEOPLE-2011-IIF).

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Authors and Affiliations

  1. Belarusian State University, 4, Nezavisimosti avenue, 220030, Minsk, Republic of Belarus

    Viktoryia I. Shautsova, Viktor A. Zhuravkov, Olga V. Korolik, Andrei G. Novikau, Gvidona P. Shevchenko & Peter I. Gaiduk

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  1. Viktoryia I. Shautsova
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  2. Viktor A. Zhuravkov
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  3. Olga V. Korolik
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  4. Andrei G. Novikau
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  5. Gvidona P. Shevchenko
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  6. Peter I. Gaiduk
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Correspondence to Viktoryia I. Shautsova.

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Shautsova, V.I., Zhuravkov, V.A., Korolik, O.V. et al. Effect of Interparticle Field Enhancement in Self-Assembled Silver Aggregates on Surface-Enhanced Raman Scattering. Plasmonics 9, 993–999 (2014). https://doi.org/10.1007/s11468-014-9706-3

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  • DOI: https://doi.org/10.1007/s11468-014-9706-3

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