Thermal Sensitive Quantum and Phonon Confinements for Temperature Mapping in Extreme Environments
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- 作者：Ashish Kumar Mishra ; Junwei Wang ; Liping Huang
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：April 3, 2014
- 年：2014
- 卷：118
- 期：13
- 页码：7222-7228
- 全文大小：528K
- 年卷期：v.118,no.13(April 3, 2014)
- ISSN：1932-7455
文摘
Spatial and/or temporal temperature mapping in extreme environments that cannot be physically accessible remains a grand challenge, such as in the interior of high tempeature solid oxide fuel cells and opaque fireballs, where real-time readout of temperature is not feasible. Our study showed that photoluminescence (PL) spectra of ZnO nanoparticles (NPs) and Raman spectra of anatase TiO2 NPs exhibit thermal sensitive quantum confinement and phonon confinement, respectively. Here, we explored the highly temperature sensitive irreversible growth of NPs together with the strong quantum and phonon confinements in these oxide NPs as unique signatures for ex situ temperature sensing, especially for applications in extreme environments. By distributing these NPs, a spatially and temporally nonuniform thermal mapping can be determined by a direct read-off of their PL and Raman spectra at various locations.