Size-dependent thermochromism through enhanced electron-phonon coupling in 1 nm quantum dots

Haruna Tamaki, Hiroto Watanabe, Sachiko Kamiyama, Yuya Oaki, Hiroaki Imai

Research output: Contribution to journalArticle

12 Citations (Scopus)

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. A dot matrix: 1 nm CuO quantum dots have been prepared in microporous silica. They exhibit unique and reversible color change from pale blue to deep green in a wide temperature range from 298 to 673 K. This thermochromism is ascribed to an enhanced bandgap shift that depends on temperature, with a strong electron-phonon coupling in the confined space of the 1 nm CuO quantum dots.

Original languageEnglish
Pages (from-to)10706-10709
Number of pages4
JournalAngewandte Chemie - International Edition
Volume53
Issue number40
DOIs
Publication statusPublished - 2014 Sep 26

Keywords

  • microporous materials
  • quantum dots
  • template synthesis
  • transition metal oxide

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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