期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 13, 期 10, 页码 6841-6845出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2013.7788
关键词
Nanothermometry; Thermal Imaging; Hyperthermia; Sodium Niobate Nanocrystal
类别
资金
- PRONEX/FAPEAL [2009-09-006]
- FINEP (Financiadora de Estudos e Projetos)
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico through the grant INCT NANO(BIO)SIMES)
- CAPES (Coordenadoria de Aperfeicoamento de Pessoal de Ensino Superior)
- Programa Nacional de Pos-Doutoramento (PNPD/CAPES) at the Universidade Federal de Alagoas (UFAL) [02727/09-9]
- CNPq
We investigate the potential use of two-photon absorption of Er3+/Yb3+ co-doped NaNbO3 nanocrystals for nanothermometry as well as thermal imaging, based on the thermally coupled green Er3+ emission lines. In fact, thermal sensor in the range of 20-80 degrees C with similar to 0.1 degrees C accuracy using excitation powers readily obtained from commercially available semiconductor laser was achieved. The pump-intensity induced local heating was also investigated upon femtosecond laser excitation and 0.55 K/kW . cm(-2) was achieved. The highly efficient green emission together with two-photon dependence and femtosecond laser excitation should increase the brightness of thermal imaging. Additionally, the high temperature-sensitive fluorescence, when compared to previous literatures, should increase the resolution of nanothermometers.
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