Autor según el artículo: Joan J. Carvajal; Oleksandr A. Savchuk; C. Cascales; M. Aguiló; F. Díaz

Departamento: Química Física i Inorgànica

Autor/es de la URV: CARVAJAL MARTÍ, JOAN JOSEP; Oleksandr A. Savchuk; C. Cascales; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL

Palabras clave: core-shell luminescence Nanosensors

Resumen: 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.

Grupo de investigación: Física i Cristal.lografia de Materials Física i Cristal·lografia de Nanomaterials

Áreas temáticas: Química Química Chemistry

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 1944-8244

Identificador del autor: 0000-0002-4389-7298; n/a; n/a; 0000-0001-6130-9579; 0000-0003-4581-4967

Fecha de alta del registro: 2016-05-02

Página final: 7273

Volumen de revista: 8

Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion

Enlace a la fuente original: https://pubs.acs.org/doi/10.1021/acsami.6b01371

DOI del artículo: 10.1021/acsami.6b01371

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2016

Página inicial: 7266

Tipo de publicación: Article Artículo Article