abstract
Transition metal dichalcogenides, including WSe2, have gained significant attention as promising nanomaterials for various applications due to their unique properties. In this study, we explore the temperature-dependent photoluminescent properties of WSe2 nanomaterials to investigate their potential as luminescent nanothermometers. We compare the performance of WSe2 quantum dots and nanorods synthesized using sonication synthesis and hot injection methods. Our results show a distinct temperature dependence of the photoluminescence, and conventional ratiometric luminescence thermometry demonstrates comparable relative thermal sensitivity (0.68-0.80% K-1) and temperature uncertainty (1.3-1.5 K), irrespective of the morphology of the nanomaterials. By applying multiple linear regression to WSe2 quantum dots, we achieve enhanced thermal sensitivity (30% K-1) and reduced temperature uncertainty (0.1 K), highlighting the potential of WSe2 as a versatile nanothermometer for microfluidics, nanofluidics, and biomedical assays.
keywords
GRAPHENE QUANTUM DOTS; TEMPERATURE; NANOCRYSTALS; THERMOMETRY; SIZE; PHOTOLUMINESCENCE; MICROSPHERES; SPECTROSCOPY; SENSITIVITY
subject category
Chemistry; Science & Technology - Other Topics; Materials Science; Physics
authors
Martínez-Merino, P; Hernández-Rodríguez, MA; Piñero, JC; Brites, CDS; Alcántara, R; Navas, J
our authors
Carlos Brites
Associate Professor
Miguel Andrés Hernández Rodríguez
Junior ResearcherProjects
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
This research was funded by the Ministerio de Ciencia, Innovacion y Universidades del Gobierno de Espana, grant numbers RTI2018-096393-B-I00 & TED2021-132518B-I00. Also, this research was funded by 2014-2020 ERDF Operational Programme and by the Department of Economy, Knowledge, Business and University of the Regional Government of Andalusia, grant number FEDER-UCA18-107510. M. A. H. R. acknowledges the "Beatriz Galindo" fellowship (BG22/00061). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC). The funding from the LogicALL project (PTDC/CTM-CTM/0298/2020) is acknowledged to FCT. The authors acknowledge Prof. Luis D. Carlos (University of Aveiro) for the fruitful discussions.