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Determination of Thermal History by Photoluminescence of Core‐Shelled Quantum Dots Going Through Heating Events |
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| Authors: | Yucheng Lan Hui Wang Nitin Skula Xiaoyuan Chen Yalin Lu Gang Chen Zhifeng Ren |
| Affiliation: | 1. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, USA;2. Department of Physics and Engineering Physics, Morgan State University, Baltimore, MD, USA;3. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA;4. Laser Optics Research Center, US Air Force Academy, Colorado Springs, CO, USA |
| Abstract: | A kind of novel thermal history nanosensors are theoretically designed and experimentally demonstrated to permanently record thermal events. The photoluminescence (PL) spectrum of core‐shelled quantum dots (QDs) CdSe/ZnS irreversibly shifts with heating histories (temperature and duration) of thermal events. The induced PL shift of the QDs CdSe/ZnS is employed to permanently record thermal histories. We further model a kind of thermal history nanosensor based on the thermal‐induced phenomena of core‐shelled QDs to permanently record thermal histories at microscale and demonstrate to reconstruct temperature and duration of heating events simultaneously from PL spectra of the QDs. The physical mechanism of the sensors is discussed. |
| Keywords: | quantum dots sensors spectrum thermometry |
