Journal
JOURNAL OF LUMINESCENCE
Volume 133, Issue -, Pages 249-253Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2011.12.022
Keywords
Bio-photonics; Two-photon luminescence; Nanothermometry; Quantum dots; Rare earth doped nano-crystals; Confocal microscopy
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Funding
- Universidad Autonoma de Madrid and Comunidad Autonoma de Madrid [CCG087-UAM/MAT-4434, S2009/MAT-1756]
- Spanish Ministerio de Educacion y Ciencia [MAT 2010-16161]
- Banco Santander CEAL-UAM project
- CAPES [02727/09-9 - PNPD-CAPES]
- CNPq
- FAPEAL [PRONEX-09-006]
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In this work we report on the ability of Er/Yb co-doped NaYF4 nano-crystals and CdTe Quantum Dots as two-photon excited fluorescent nano-thermometers. The basic physical phenomena causing the thermal sensitivity of the two-photon excited emission bands have been discussed and the maximum thermal resolution achievable in each case has been estimated. The practical application of both systems for thermal sensing at the micro-scale in biological systems is demonstrated. In particular, they have been used to evaluate the thermal loading induced by tightly focused laser beams in both living cells and fluids. (c) 2011 Elsevier B.V. All rights reserved.
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