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Size‐Dependent Thermochromism through Enhanced Electron–Phonon Coupling in 1 nm Quantum Dots |
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| Authors: | Haruna Tamaki Dr Hiroto Watanabe Sachiko Kamiyama Dr Yuya Oaki Prof Dr Hiroaki Imai |
| Institution: | 1. Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3‐14‐1 Hiyoshi, Kohoku‐ku, Yokohama 223‐8522 (Japan);2. Material Technology Group, Tokyo Metropolitan Industrial Technology Research Institute, 2‐4‐10 Aomi, Koto‐ku, Tokyo 135‐0064 (Japan) |
| Abstract: | 1 nm CuO quantum dots (QDs) were produced in size‐controlled super‐micropores of a silica matrix. The reversible color change of the QDs from pale blue to deep green was clearly observed in a wide temperature range from 298 to 673 K. This particular thermochromism is ascribed to an enhanced bandgap shift depending on temperature with a strong electron–phonon coupling in the confined space of the 1 nm QDs. |
| Keywords: | microporous materials quantum dots template synthesis transition metal oxide |