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

  • Identification data

    Identifier: PC:1531
    Handle: https://hdl.handle.net/20.500.11797/PC1531
    Authors:
    Joan J. CarvajalOleksandr A. SavchukC. CascalesM. AguilóF. Díaz
    Abstract:
    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.

  • Others:

    Author, as appears in the article.: Joan J. Carvajal; Oleksandr A. Savchuk; C. Cascales; M. Aguiló; F. Díaz
    Department: Química Física i Inorgànica
    URV's Author/s: CARVAJAL MARTÍ, JOAN JOSEP; Oleksandr A. Savchuk; C. Cascales; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL
    Keywords: core-shell luminescence Nanosensors
    Abstract: 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.
    Research group: Física i Cristal.lografia de Materials Física i Cristal·lografia de Nanomaterials
    Thematic Areas: Química Química Chemistry
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1944-8244
    Author identifier: 0000-0002-4389-7298; n/a; n/a; 0000-0001-6130-9579; 0000-0003-4581-4967
    Record's date: 2016-05-02
    Last page: 7273
    Journal volume: 8
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://pubs.acs.org/doi/10.1021/acsami.6b01371
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1021/acsami.6b01371
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2016
    First page: 7266
    Publication Type: Article Artículo Article

  • Keywords:

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

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