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Proceedings Paper

SERS spectroscopy and quantum-chemical calculations of stilbene amino derivatives in conditions of adsorption on silver nanoparticles
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Paper Abstract

In this paper, the DFT calculations for three stilbene derivatives, of 4-aminostilbene, 4,4'-diaminostilbene and 4-amino- 4'-(N,N-diethylamino)stilbene, are proposed enabling to assign the SERS spectra reliably, including in the «hot spots» conditions. The choice of the best model is made based on more than 50 calculations of molecule*Agn clusters. We studied, how the cluster size (4, 6 and 14 silver atoms), charge (positive localized, non-localized and neutral) and solvent accounting affect on the results of calculation. The obtained theoretical data is compared with the SERS experimental results and with the similar systems from literature. The best correspondence is obtained for the systems with Ag14 complexes (both, in the «bridge way» and «single-end» absorption). Accounting for the solvent brings the calculated data substantially closer to the experimental as well. Charge localization affects on the calculated results for asymmetric complexes only at a given level of theory.

Paper Details

Date Published: 1 April 2020
PDF: 14 pages
Proc. SPIE 11345, Nanophotonics VIII, 1134522 (1 April 2020); doi: 10.1117/12.2553935
Show Author Affiliations
Aleksei N. Smirnov, Saint Petersburg State Univ. (Russian Federation)
Olga V. Odintsova, Saint Petersburg State Univ. (Russian Federation)
Aleksei S. Strelnikov, Saint Petersburg State Univ. (Russian Federation)
Alisa I. Shevchuk, Saint Petersburg State Univ. (Russian Federation)
Elena V. Solovyeva, Saint Petersburg State Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 11345:
Nanophotonics VIII
David L. Andrews; Angus J. Bain; Martti Kauranen; Jean-Michel Nunzi, Editor(s)

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