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

• DOI: 10.1021/acsami.6b01371
• Publication Date: 2016-03-07T15:41:20Z
• Authors: Oleksandr A. Savchuk; Joan J. Carvajal; C. Cascales; M. Aguiló; F. Díaz
• Keywords: Thermal Stability; Atmospheric temperature range

We studied the temperature-dependent luminescence of GdVO4 nanoparticles co-doped with Er(3+) (1 mol %) and Yb(3+) (20 determined their thermal sensing properties through fluorescence intensity ratio (FIR) technique. also analyzed how a silica coating, in core-shell structure, affects temperature this material. Spectra were recorded range biological temperatures (298-343 K). The absolute sensitivity for determination calculated is double one bare nanoparticles, achieving resolution 0.4 K. Moreover, silica-coated show good dispersibility different solvents, such as water, DMSO, methanol. Also, they stability without interactions solvent molecules. Furthermore, we observed that coating shell prevents progressive heating during prolonged excitation periods 980 nm laser, preventing effects on thermometric applications.