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Surface-enhanced Raman scattering (SERS) as probe of plasmonic near-field resonances
Affiliation:1. Center for Computational Natural Sciences and Bioinformatics (CCNSB), International Institute of Information Technology, Hyderabad, Telangana 500 032, India;2. On lien from Department of Physics, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur, Andhra Pradesh 522 502, India;1. Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Av. dos Estados 5001, Santo André, SP 09210-580, Brazil;2. Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, São Paulo, SP 05508-000, Brazil;1. Laboratório de Química de Calixarenos, Espectroscopia Molecular e Catálise (LQCEMC), Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Rua Prof. Arthur Riedel, 275, CEP 09972-270, Diadema, SP, Brazil;2. Laboratório de Espécies Químicas Altamente Reativas (LQBEAR), Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Rua Prof. Arthur Riedel, 275, CEP 09972-270, Diadema, SP, Brazil
Abstract:Near-field plasmonic properties are fundamental for the various applications of metal nanoparticles. In this sense, a characterization of such properties is essential for a better understanding of the electromagnetic interactions probed by the materials. In this manuscript we discuss the possibility of using surface-enhanced Raman scattering (SERS) as a possible experimental probe of near-field resonance properties of metal nanoparticles aggregates. In this specific case, we investigate both, theoretically and experimentally, the behavior of broad and narrow near-field enhancement resonances in the SERS spectra of adsorbed molecules. We believe the results presented here may open new possibilities and insights in plasmonic nanoparticle properties characterization for different applications.
Keywords:SERS  Plasmon  Near-field  Fano resonance
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