Hot Paper: Plasmonic Modulation of the Upconversion Fluorescence in NaYF4:Yb/Tm Hexaplate Nanocrystals Using Gold Nanoparticles or Nanoshells

Hot Paper: Plasmonic Modulation of the Upconversion Fluorescence in NaYF4:Yb/Tm Hexaplate Nanocrystals Using Gold Nanoparticles or Nanoshells: "

Hua Zhang, Yujing Li, Ivan A. Ivanov, Yongquan Qu, Yu Huang*, Xiangfeng Duan*

Automatic upgrade: Attachment of gold nanoparticles (NPs) to upconversion nanocrystals (NCs) results in plasmonic interactions that lead to an enhancement factor of over 2.5 in the upconversion emission. Conversely, formation of a gold shell significantly suppresses the NC emission because of considerable scattering of excitation irradiation (see picture; a=NCs before seed attachment; b, c=NCs with increasing numbers of NPs; scale bar=50 nm).

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