Estudio computacional de factores de intensificación de campo local y SERS mediante la teoría de Mie

Translated title of the contribution: Computational calculations of local field and SERS enhancement factors using Mie theory

J. E. Gómez, F. R. Pérez

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Surface-Enhanced Raman Spectroscopy (SERS) is based on the amplification of Raman signals. One of the enhancement mechanisms is explained by the plasmon resonance of metal nanostructures. This work consists of the computational calculation, using Mie theory, of the Local Field Enhancement Factor (LFIEF) and the SERS Enhancement Factor (SERS EF) for an electric dipole signal close to a single metallic nanosphere (NP). Different sizes of silver, gold and aluminum NP suspended in ethanol, N,N-dimethylformamide, and chloroform were analyzed. The results show that the intensification peak agrees with the excitation wavelength for the respective plasmon resonance of each metal. It is evident that the size of the NP influences the magnitude of the intensity obtained; in addition, it is observed that the medium in which they are suspended produces a shift of the intensification peaks. For aluminum NP, an intensification peak around 200 nm suggests its possible use as a base for SERS substrate using ultraviolet excitation

    Translated title of the contributionComputational calculations of local field and SERS enhancement factors using Mie theory
    Original languageSpanish
    Article number51082
    JournalOptica Pura y Aplicada
    Volume55
    Issue number1
    DOIs
    StatePublished - 2022

    Bibliographical note

    Funding Information:
    The Authors acknowledge Ministry of Science, Technology, and Innovation of Colombia for its financial support to the project by contract number -80740 195-2019, Call 808-2018 Proyectos de Ciencia, Tecnología e Innovación y su Contribución a los Retos de País.

    Publisher Copyright:
    © Sociedad Española de Óptica

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