Articles producció científica> Química Física i Inorgànica

Benefits of Silica Core-Shell Structures on the Temperature Sensing Properties of Er,Yb:GdVO4 Up-Conversion Nanoparticles

  • Dades identificatives

    Identificador: PC:1531
    Handle: https://hdl.handle.net/20.500.11797/PC1531
    Autors:
    Joan J. CarvajalOleksandr A. SavchukC. CascalesM. AguilóF. Díaz
    Resum:
    We studied the temperature-dependent luminescence of GdVO4 nanoparticles co-doped with Er3+ (1 mol %) and Yb3+ (20 mol %) and determined their thermal sensing properties through the fluorescence intensity ratio (FIR) technique. We also analyzed how a silica coating, in a core-shell structure, affects the temperature sensing properties of this material. Spectra were recorded in the range of biological temperatures (298-343 K). The absolute sensitivity for temperature determination calculated for the core-shell nanoparticles is double the one calculated for bare nanoparticles, achieving a thermal resolution of 0.4 K. Moreover, silica-coated nanoparticles show good dispersibility in different solvents, such as water, DMSO, and methanol. Also, they show good luminescence stability without interactions with solvent molecules. Furthermore, we also observed that the silica coating shell prevents progressive heating of the nanoparticles during prolonged excitation periods with the 980 nm laser, preventing effects on their thermometric applications.

  • Altres:

    Autor segons l'article: Joan J. Carvajal; Oleksandr A. Savchuk; C. Cascales; M. Aguiló; F. Díaz
    Departament: Química Física i Inorgànica
    Autor/s de la URV: CARVAJAL MARTÍ, JOAN JOSEP; Oleksandr A. Savchuk; C. Cascales; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL
    Paraules clau: core-shell luminescence Nanosensors
    Resum: We studied the temperature-dependent luminescence of GdVO4 nanoparticles co-doped with Er3+ (1 mol %) and Yb3+ (20 mol %) and determined their thermal sensing properties through the fluorescence intensity ratio (FIR) technique. We also analyzed how a silica coating, in a core-shell structure, affects the temperature sensing properties of this material. Spectra were recorded in the range of biological temperatures (298-343 K). The absolute sensitivity for temperature determination calculated for the core-shell nanoparticles is double the one calculated for bare nanoparticles, achieving a thermal resolution of 0.4 K. Moreover, silica-coated nanoparticles show good dispersibility in different solvents, such as water, DMSO, and methanol. Also, they show good luminescence stability without interactions with solvent molecules. Furthermore, we also observed that the silica coating shell prevents progressive heating of the nanoparticles during prolonged excitation periods with the 980 nm laser, preventing effects on their thermometric applications.
    Grup de recerca: Física i Cristal.lografia de Materials Física i Cristal·lografia de Nanomaterials
    Àrees temàtiques: Química Química Chemistry
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1944-8244
    Identificador de l'autor: 0000-0002-4389-7298; n/a; n/a; 0000-0001-6130-9579; 0000-0003-4581-4967
    Data d'alta del registre: 2016-05-02
    Pàgina final: 7273
    Volum de revista: 8
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2016
    Pàgina inicial: 7266
    Tipus de publicació: Article Artículo Article

  • Paraules clau:

    Luminiscència
    core-shell
    luminescence
    Nanosensors
    Química
    Química
    Chemistry
    1944-8244

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