Boltzmann-Distribution-Driven Cathodoluminescence Thermometry in In Situ Transmission Electron MicroscopyClick to copy article linkArticle link copied!
- Pavel K. OlshinPavel K. OlshinDepartment of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of KoreaMore by Pavel K. Olshin
- Won-Woo ParkWon-Woo ParkDepartment of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of KoreaMore by Won-Woo Park
- Ye-Jin KimYe-Jin KimDepartment of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of KoreaMore by Ye-Jin Kim
- Ye-Jin ChoiYe-Jin ChoiDepartment of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of KoreaMore by Ye-Jin Choi
- Daria V. MamonovaDaria V. MamonovaDepartment of Chemistry, St. Petersburg State University, St. Petersburg 199034, RussiaMore by Daria V. Mamonova
- Ilya E. KolesnikovIlya E. KolesnikovCenter for Optical and Laser Materials Research, St. Petersburg State University, St. Petersburg 199034, RussiaMore by Ilya E. Kolesnikov
- Elena V. AfanasevaElena V. AfanasevaDepartment of Chemistry, Peter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, RussiaMore by Elena V. Afanaseva
- Oh-Hoon Kwon*Oh-Hoon Kwon*Email: [email protected]Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of KoreaMore by Oh-Hoon Kwon
Abstract

Nanothermometry in in situ transmission electron microscopy (TEM) is useful for comprehending the functioning mechanisms of the heterogeneous matter through real-time observations. Herein, we introduce a Boltzmann-distribution-driven cathodoluminescence (CL) nanothermometry for in situ local temperature probing in TEM. The population distribution across the close-lying Stark sublevels of dysprosium ions in an yttrium vanadate matrix follows the Boltzmann distribution, enabling the use of the CL-intensity ratio as a thermometry over a wide temperature range of 103–435 K with a relative sensitivity exceeding 3% K–1 and precision of ±2%. Superior to other CL-based thermometries, the present approach is independent of electron–beam parameters and dopant concentration, extending the robustness and applicability of CL-based nanothermometry in electron microscopy. We further demonstrate the real-time mapping of the temperature distribution across a TEM grid under laser irradiation.
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