Localised surface plasmon resonance inducing cooperative Jahn–Teller effect for crystal phase-change in a nanocrystal

HANDLE Open Access
  • Sakamoto, Masanori
    Institute for Chemical Research, Kyoto University
  • Hada, Masaki
    Tsukuba Research Center for Energy Materials Science (TREMS), Faculty of Pure and Applied Sciences, University of Tsukuba
  • Ota, Wataru
    Fukui Institute for Fundamental Chemistry, Kyoto University; Department of Molecular Engineering, Graduate School of Engineering, Kyoto University
  • Uesugi, Fumihiko
    National Institute for Materials Science (NIMS)
  • Sato, Tohru
    Fukui Institute for Fundamental Chemistry, Kyoto University; Department of Molecular Engineering, Graduate School of Engineering, Kyoto University

Description

The Jahn–Teller effect, a phase transition phenomenon involving the spontaneous breakdown of symmetry in molecules and crystals, causes important physical and chemical changes that affect various fields of science. In this study, we discovered that localised surface plasmon resonance (LSPR) induced the cooperative Jahn–Teller effect in covellite CuS nanocrystals (NCs), causing metastable displacive ion movements. Electron diffraction measurements under photo illumination, ultrafast time-resolved electron diffraction analyses, and theoretical calculations of semiconductive plasmonic CuS NCs showed that metastable displacive ion movements due to the LSPR-induced cooperative Jahn–Teller effect delayed the relaxation of LSPR in the microsecond region. Furthermore, the displacive ion movements caused photo-switching of the conductivity in CuS NC films at room temperature (22 °C), such as in transparent variable resistance infrared sensors. This study pushes the limits of plasmonics from tentative control of collective oscillation to metastable crystal structure manipulation.

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Details 詳細情報について

  • CRID
    1050578514828206976
  • ISSN
    20411723
  • HANDLE
    2433/284499
  • Text Lang
    en
  • Article Type
    journal article
  • Data Source
    • IRDB

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