Highly Enhanced Emission of Visible Light from Core–Dual-Shell-Type Hybridized Nanoparticles

Naonari Sakamoto, Tsunenobu Onodera, Takuma Dezawa, Yutaka Shibata, Hidetoshi Oikawa

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Core–dual-shell-type hybridized nanoparticles (NPs) having Au-core/dye-doped silica inner shell/Au outer shell are successfully fabricated by developing a biphasic process that is a kind of so-called “one-pot” method. The resulting hybridized NPs exhibit evidently about 20-fold enhancement of fluorescence intensity, increase in fluorescence quantum yield, and decrease in fluorescence lifetime. These effects depend on the metal nanostructure being optimized, compared with the reference hybridized NPs with neither a Au-core nor a Au outer shell, due to the gap-mode effect induced by localized surface plasmon resonance in the core–dual-shell-type MIM-like nanostructure. More detailed elucidation concerning the enhancement mechanism will provide the possibility of photonic device application, for example as a high-performance point light source, nanolaser, or sensor for bioimaging in the visible region in the near future.

Original languageEnglish
Article number1700258
JournalParticle and Particle Systems Characterization
Issue number12
Publication statusPublished - 2017 Dec


  • core–shell nanostructures
  • fluorescence enhancement
  • gap modes
  • localized surface plasmon resonance
  • plasmonics

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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