Upconversion thermometry: a new tool to measure the thermal resistance of nanoparticles


The rapid evolution in luminescence thermometry in the last few years gradually shifted the research from the fabrication of more sensitive nanoarchitectures towards the use of the technique as a tool for thermal bioimaging and for the unveiling of properties of the thermometers themselves and of their local surroundings, for example to evaluate heat transport at unprecedented small scales. In this work, we demonstrated that KLu(WO4)(2):Ho3+,Tm3+ nanoparticles are able to combine controllable heat release and upconversion thermometry permitting to estimate its thermal resistance (in air), a key parameter to model the heat transfer at the nanoscale.



subject category

Chemistry; Science & Technology - Other Topics; Materials Science; Physics


Savchuk, OA; Carvajal, JJ; Brites, CDS; Carlos, LD; Aguilo, M; Diaz, F

our authors


This work has been supported by the Ministerio de Economia, Industria y Competitividad, the Agencia Estatal de Investigacion (AEI) and the European Regional Development Fund (ERDF) under Projects No. TEC2014-55948-R and MAT2016-75716-C2-1-R (AEI/FEDER, UE), Secretaria d'Universitats i Recerca del Departament d'Economia i Coneixement de la Generalitat de Catalunya, the European Union (EU) and the European Social Fund (ESF) under Project No. 2017SGR755, and CMST COST Action CM1403, and partially developed in the scope of the project CICECO - Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by Portuguese funds through the FundacAo para a Ciencia e a Tecnologia/Ministerio da EducacAo e Ciencia (FCT/MEC) and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. Financial support of FCT (PTDC/CTM-NAN/4647/2014 and POCI-01-0145-FEDER-016687) is also acknowledged. OAS was supported by the Catalan Government through the fellowship 2015FI_B 00136, CDSB thanks the individual grant financed by the SusPhotoSolutions project CENTRO-01-0145-FEDER-000005, and FD acknowledges additional support through the ICREA Academia awards 2010ICREA-02 for excellence in research.

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