Author, as appears in the article.: Savchuk O; Carvajal J; Cesteros Y; Salagre P; Nguyen H; Rodenas A; Massons J; Aguiló M; Díaz F

Department: Química Física i Inorgànica

URV's Author/s: , / Aguiló Díaz, Magdalena / Carvajal Martí, Joan Josep / Cesteros Fernández, Yolanda / Masons Bosch, Jaime / Salagre Carnero, María Pilar

Keywords: Upconversion nanoparticles Thermal mapping Nanothermometry Green synthesis Graphene thermal mapping nanothermometry green synthesis graphene

Abstract: © 2019 Savchuk, Carvajal, Cesteros, Salagre, Nguyen, Rodenas, Massons, Aguiló and Díaz. This study analyzes the mapping of temperature distribution generated by graphene in a glass slide cover after illumination at 808 nm with a good thermal resolution. For this purpose, Er,Yb:NaYF4 nanoparticles prepared by a microwave-assisted solvothermal method were used as upconversion luminescent nanothermometers. By tuning the basic parameters of the synthesis procedure, such as the time and temperature of reaction and the concentration of ethanol and water, we were able to control the size and the crystalline phase of the nanoparticles, and to have the right conditions to obtain 100% of the β hexagonal phase, the most efficient spectroscopically. We observed that the thermal sensitivity that can be achieved with these particles is a function of the size of the nanoparticles and the crystalline phase in which they crystallize. We believe that, with suitable changes, these nanoparticles might be used in the future to map temperature gradients in living cells while maintaining a good thermal resolution.

Thematic Areas: Química Medicina ii Medicina i Materiais Interdisciplinar General chemistry Farmacia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Biotecnología Biodiversidade

ISSN: 22962646

Author's mail: pilar.salagre@urv.cat f.diaz@urv.cat yolanda.cesteros@urv.cat jaume.masons@urv.cat magdalena.aguilo@urv.cat joanjosep.carvajal@urv.cat

Author identifier: 0000-0003-3257-2022 0000-0003-4581-4967 0000-0002-5439-9358 0000-0003-4325-6084 0000-0001-6130-9579 0000-0002-4389-7298

Record's date: 2023-10-14

Journal volume: 7

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.frontiersin.org/articles/10.3389/fchem.2019.00088/full

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Frontiers In Chemistry. 7 (FEB): 88-

APA: Savchuk O; Carvajal J; Cesteros Y; Salagre P; Nguyen H; Rodenas A; Massons J; Aguiló M; Díaz F (2019). Mapping temperature distribution generated by photothermal conversion in graphene film using Er,Yb:NaYF4 nanoparticles prepared by microwave-assisted solvothermal method. Frontiers In Chemistry, 7(FEB), 88-. DOI: 10.3389/fchem.2019.00088

Article's DOI: 10.3389/fchem.2019.00088

Entity: Universitat Rovira i Virgili

Journal publication year: 2019

Publication Type: Journal Publications