Localized surface plasmon enhanced photoluminescence of ZnO nanosheets by Au nanoparticles

Rizwan Khan, Periyayya Uthirakumar, Kang Bin Bae, See Jong Leem, In-Hwan Lee

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

ZnO nanosheets were synthesized by a facile low temperature hydrothermal method and the Au nanoparticles were decorated on the surface of ZnO nanosheets by an in-situ solution method. The ZnO nanostructures had sheet-like morphology with relatively uniform size and possessed high crystallinity. The average diameter of Au nanoparticles decorated on the ZnO nanosheets was around 10-20 nm. The ultraviolet emission from Au decorated ZnO nanosheets was greatly enhanced and the green emission was significantly suppressed compared with the bare ZnO nanosheets. This excellent photoluminescence performance was attributable to the surface-plasmon-mediated sequential transfer of defect energy from ZnO to Au and electron transfer from excited Au to ZnO.

Original languageEnglish
Article number19689
Pages (from-to)8-11
Number of pages4
JournalMaterials Letters
Volume163
DOIs
Publication statusPublished - 2016 Jan 15
Externally publishedYes

Keywords

  • Localized surface plasmons
  • Nanosheets
  • Photoluminescence
  • ZnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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