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Plasmonic Modulation of the Upconversion Fluorescence in NaYF 4 :Yb/Tm Hexaplate Nanocrystals Using Gold Nanoparticles or Nanoshells
Author(s) -
Zhang Hua,
Li Yujing,
Ivanov Ivan A.,
Qu Yongquan,
Huang Yu,
Duan Xiangfeng
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200905805
Subject(s) - computer science , artificial intelligence , materials science , library science
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).