Synthesis of photochromic nanoparticles and determination of the mechanism of photochromism

Shuhei Inoue, Takahiro Kawamoto, Yukihiko Matsumura, Kentaro Tomita, Kiichiro Uchino, Keiji Takata, Hiroshi Kajiyama

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Photochromic nanoparticles of zinc-silicon oxide were synthesized using plasma enhanced chemical vapor deposition. These particles turned black upon irradiating with ultraviolet light. We investigated this phenomenon using density functional theory calculations. Silicon inclusions create trap levels and oxygen defects that reduce the ionization potential of ZnO. This forms a quantum potential between ZnO and zinc-silicon oxide, and the excited electron is stable. Because oxygen defects also increase the bond overlap population between the zinc atoms in a ZnO crystal, they introduce further defects and help in the formation of quantum potentials. Growth of a perfect crystal of ZnO prevents the formation of oxygen defects, which is not desirable for photochromism.

Original languageEnglish
Article number055214
JournalAIP Advances
Volume6
Issue number5
DOIs
Publication statusPublished - May 1 2016

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photochromism
nanoparticles
defects
synthesis
silicon oxides
zinc oxides
oxygen
ionization potentials
ultraviolet radiation
crystals
zinc
traps
vapor deposition
inclusions
density functional theory
silicon
atoms
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Synthesis of photochromic nanoparticles and determination of the mechanism of photochromism. / Inoue, Shuhei; Kawamoto, Takahiro; Matsumura, Yukihiko; Tomita, Kentaro; Uchino, Kiichiro; Takata, Keiji; Kajiyama, Hiroshi.

In: AIP Advances, Vol. 6, No. 5, 055214, 01.05.2016.

Research output: Contribution to journalArticle

Inoue, Shuhei ; Kawamoto, Takahiro ; Matsumura, Yukihiko ; Tomita, Kentaro ; Uchino, Kiichiro ; Takata, Keiji ; Kajiyama, Hiroshi. / Synthesis of photochromic nanoparticles and determination of the mechanism of photochromism. In: AIP Advances. 2016 ; Vol. 6, No. 5.
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