Plasmonic modulation of the upconversion fluorescence in NaYF4 :Yb/Tm hexaplate nanocrystals using gold nanoparticles or nanoshells

Angew Chem Int Ed Engl. 2010 Apr 6;49(16):2865-8. doi: 10.1002/anie.200905805. Epub 2010 Mar 16.

Abstract

Automatic upgrade: attachment of gold nanoparticles (NPs) onto upconversion nanocrystals (NCs) results in plasmonic interactions that lead to a significant enhancement of upconversion emission of more than 2.5. Conversely, formation of a gold shell greatly suppresses the NC emission because of considerable scattering of excitation irradiation (see picture; a=NC before seed attachment; b, c=NC with attached Au NPs; c=NC with Au shell; scale bar=50 nm).

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Fluorescence
  • Fluorides / chemical synthesis
  • Fluorides / chemistry*
  • Gold / chemistry*
  • Metal Nanoparticles / chemistry*
  • Nanoshells / chemistry*
  • Thulium / chemistry*
  • Ytterbium / chemistry*
  • Yttrium / chemistry*

Substances

  • sodium yttriumtetrafluoride
  • Yttrium
  • Gold
  • Thulium
  • Ytterbium
  • Fluorides