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• W2912354317 abstract "Abstract At any applications of surface‐enhanced Raman scattering (SERS) spectroscopy, from detection of small ions to recognition of large biological molecules, an understanding the spectral profiles and its transformation occurring under changes of local environment is an important stage essential for a reliable chemical analysis. In this work, we showed that the adsorption of 4,4'‐diaminostilbene on Ag nanoparticles is accompanied by a dramatic change in the SERS profile observed at transition from submonolayer to multilayer coverage. A profile deconvolution analysis allowed revealing the spectral signatures inherent for the surface species existing at submonolayer and multilayer adsorption corresponding to the hot spots and ordinary conditions, respectively. A resonance character of Raman enhancement was detected in the case of 4,4'‐diaminostilbene adsorbed in hot spots regions. A feasibility of ligand to metal charge transfer was proved on the basis of ultraviolet–visible data. The overtones and combination bands were observed in the SERS spectra at resonance conditions. The spectral signatures of the molecules inside and outside hot spots regions were assigned. A considerable activation of rings vibrations together with a suppression of ethylenic bridge vibrations was revealed in both cases. The most prominent features of 4,4'‐diaminostilbene linked with two Ag nanoparticles in the range 200–1,800 cm ‐1 are the medium bands at 581 and 1249 cm ‐1 corresponding to CCC bending and C–N stretching modes, respectively. The obtained results can serve as a basis for development of new powerful Raman techniques for evaluation of surface coverage and “hot spots mapping,” which are of great interest for surface science and plasmonics." @default.
• W2912354317 created "2019-02-21" @default.
• W2912354317 creator A5007172335 @default.
• W2912354317 date "2019-01-24" @default.
• W2912354317 modified "2023-09-23" @default.
• W2912354317 title "Surface‐enhanced Raman scattering of 4,4'‐diaminostilbene: Dependence of spectral features and resonant enhancement on surface coverage" @default.
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• W2912354317 doi "https://doi.org/10.1002/jrs.5562" @default.
• W2912354317 hasPublicationYear "2019" @default.
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