Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Supported ultra-thin alumina membranes with graphene as efficient interference enhanced raman scattering platforms for sensing

  • Dades identificatives

    Identificador: imarina:6285357
    Autors:
    Aguilar-Pujol, MontserratRamirez-Jimenez, RafaelXifre-Perez, ElisabetCortijo-Campos, SandraBartolome, JavierMarsal, Lluis Fde Andres, Alicia
    Resum:
    © 2020 by the authors. Licensee MDPI, Basel, Switzerland. T. The detection of Raman signals from diluted molecules or biomaterials in complex media is still a challenge. Besides the widely studied Raman enhancement by nanoparticle plasmons, interference mechanisms provide an interesting option. A novel approach for amplification platforms based on supported thin alumina membranes was designed and fabricated to optimize the interference processes. The dielectric layer is the extremely thin alumina membrane itself and, its metallic aluminum support, the reflecting medium. A CVD (chemical vapor deposition) singlelayer graphene is transferred on the membrane to serve as substrate to deposit the analyte. Experimental results and simulations of the interference processes were employed to determine the relevant parameters of the structure to optimize the Raman enhancement factor (E.F.). Highly homogeneous E.F. over the platform surface are obtained, typically 370 ± (5%), for membranes with ~100 nm pore depth, ~18 nm pore diameter and the complete elimination of the Al2O3 bottom barrier layer. The combined surface enhanced Raman scattering (SERS) and interference amplification is also demonstrated by depositing ultra-small silver nanoparticles. This new approach to amplify the Raman signal of analytes is easily obtained, low-cost and robust with useful enhancement factors (~400) and allows only interference or combined enhancement mechanisms, depending on the analyte requirements.
  • Altres:

    Autor segons l'article: Aguilar-Pujol, Montserrat; Ramirez-Jimenez, Rafael; Xifre-Perez, Elisabet; Cortijo-Campos, Sandra; Bartolome, Javier; Marsal, Lluis F; de Andres, Alicia
    Departament: Enginyeria Electrònica, Elèctrica i Automàtica
    Autor/s de la URV: Marsal Garví, Luis Francisco / Xifré Pérez, Elisabet
    Paraules clau: Surface Sers Sem Optical simulations Nanoparticles Interference Graphene Enhanced raman scattering Alumina membrane Afm sem nanoparticles interference graphene enhanced raman scattering alumina membrane afm
    Resum: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. T. The detection of Raman signals from diluted molecules or biomaterials in complex media is still a challenge. Besides the widely studied Raman enhancement by nanoparticle plasmons, interference mechanisms provide an interesting option. A novel approach for amplification platforms based on supported thin alumina membranes was designed and fabricated to optimize the interference processes. The dielectric layer is the extremely thin alumina membrane itself and, its metallic aluminum support, the reflecting medium. A CVD (chemical vapor deposition) singlelayer graphene is transferred on the membrane to serve as substrate to deposit the analyte. Experimental results and simulations of the interference processes were employed to determine the relevant parameters of the structure to optimize the Raman enhancement factor (E.F.). Highly homogeneous E.F. over the platform surface are obtained, typically 370 ± (5%), for membranes with ~100 nm pore depth, ~18 nm pore diameter and the complete elimination of the Al2O3 bottom barrier layer. The combined surface enhanced Raman scattering (SERS) and interference amplification is also demonstrated by depositing ultra-small silver nanoparticles. This new approach to amplify the Raman signal of analytes is easily obtained, low-cost and robust with useful enhancement factors (~400) and allows only interference or combined enhancement mechanisms, depending on the analyte requirements.
    Àrees temàtiques: Physics, applied Nanoscience & nanotechnology Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science General chemical engineering Engenharias ii Chemistry, multidisciplinary Chemical engineering (miscellaneous) Chemical engineering (all)
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 2079-4991
    Adreça de correu electrònic de l'autor: elisabet.xifre@urv.cat lluis.marsal@urv.cat
    Identificador de l'autor: 0000-0001-6072-9889 0000-0002-5976-1408
    Data d'alta del registre: 2024-10-12
    Volum de revista: 10
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2079-4991/10/5/830
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Nanomaterials. 10 (5): 830-
    Referència de l'ítem segons les normes APA: Aguilar-Pujol, Montserrat; Ramirez-Jimenez, Rafael; Xifre-Perez, Elisabet; Cortijo-Campos, Sandra; Bartolome, Javier; Marsal, Lluis F; de Andres, Alic (2020). Supported ultra-thin alumina membranes with graphene as efficient interference enhanced raman scattering platforms for sensing. Nanomaterials, 10(5), 830-. DOI: 10.3390/nano10050830
    DOI de l'article: 10.3390/nano10050830
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2020
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Chemical Engineering (Miscellaneous),Chemistry, Multidisciplinary,Materials Science (Miscellaneous),Materials Science, Multidisciplinary,Nanoscience & Nanotechnology,Physics, Applied
    Surface
    Sers
    Sem
    Optical simulations
    Nanoparticles
    Interference
    Graphene
    Enhanced raman scattering
    Alumina membrane
    Afm
    sem
    nanoparticles
    interference
    graphene
    enhanced raman scattering
    alumina membrane
    afm
    Physics, applied
    Nanoscience & nanotechnology
    Materials science, multidisciplinary
    Materials science (miscellaneous)
    Materials science (all)
    General materials science
    General chemical engineering
    Engenharias ii
    Chemistry, multidisciplinary
    Chemical engineering (miscellaneous)
    Chemical engineering (all)
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