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CdTe Quantum Dots as Nanothermometers: Towards Highly Sensitive Thermal Imaging

Authors

  • Laura M. Maestro,

    1. Fluorescence Imaging Group, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid 28049, Spain
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  • Carlos Jacinto,

    1. Grupo de Fotônica e Fluidos Complexos, Instituto de Física, Universidade Federal de Alagoas, 57072–970, Maceio-AL, Brazil
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  • Ueslen R. Silva,

    1. Grupo de Fotônica e Fluidos Complexos, Instituto de Física, Universidade Federal de Alagoas, 57072–970, Maceio-AL, Brazil
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  • Fiorenzo Vetrone,

    1. Institut National de la Recherche Scientifique–Énergie, Matériaux et Télécommunications, Université du Québec, Varennes, QC J3X 1S2, Canada
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  • John A. Capobianco,

    1. Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada
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  • Daniel Jaque,

    Corresponding author
    1. Fluorescence Imaging Group, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid 28049, Spain
    • Fluorescence Imaging Group, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid 28049, Spain.
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  • José García Solé

    1. Fluorescence Imaging Group, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid 28049, Spain
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Abstract

original image

High-resolution thermal sensing at the nanoscale with sensitivities below 0.25 °C is possible using ultra-small CdTe-based quantum dots with diameters close to 1 nm. The two-photon emission band of this material shows an unexpected thermally induced spectral shift.

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