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Size‐Dependent Thermochromism through Enhanced Electron–Phonon Coupling in 1 nm Quantum Dots
Author(s) -
Tamaki Haruna,
Watanabe Hiroto,
Kamiyama Sachiko,
Oaki Yuya,
Imai Hiroaki
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201406330
Subject(s) - thermochromism , quantum dot , materials science , coupling (piping) , band gap , blueshift , condensed matter physics , phonon , electron , atmospheric temperature range , optoelectronics , matrix (chemical analysis) , photoluminescence , physics , quantum mechanics , composite material , meteorology
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.