SERS Detection of Small Inorganic Molecules and Ions

Authors

  • Prof. Ramón A. Alvarez-Puebla,

    Corresponding author
    1. Departamento de Quimica-Fisica, Universidade de Vigo, 36310 Vigo (Spain)
    2. ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain.
    3. Department of Electronic Engineering & Center for Chemical Technology of Catalonia. Universitat Rovira i Virgili, Avda. Països Catalans, 2643007 Tarragona, Spain
    • Departamento de Quimica-Fisica, Universidade de Vigo, 36310 Vigo (Spain)
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  • Prof. Luis M. Liz-Marzán

    Corresponding author
    1. Departamento de Quimica-Fisica, Universidade de Vigo, 36310 Vigo (Spain)
    2. Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain
    3. Centre for Cooperative Research in Biomaterials (CIC biomaGUNE), Paseo de Miramón 182, 20009 San Sebastián, Spain
    • Departamento de Quimica-Fisica, Universidade de Vigo, 36310 Vigo (Spain)
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  • SERS=Surface-enhanced Raman scattering.

Abstract

Surface-enhanced Raman scattering (SERS) is one of the most straightforward applications of the so-called nanoplasmonics. This powerful molecular spectroscopy technique is based on the enhancement of the inelastic scattering from molecules located near nanostructured metallic surfaces when these are illuminated and surface plasmons are excited. The analytical applications of SERS are hindered when the Raman cross-section of the analyte is too low, which is often the case in inorganic molecular species. This problem is even more serious when atomic species are to be identified, since these cannot display a vibrational signal. Herein we discuss the recent advancements toward the SERS detection of small inorganic compounds, including both molecular and atomic species.

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