Plasmonic modulation of the upconversion fluorescence in NaYF4 :Yb/Tm hexaplate nanocrystals using gold nanoparticles or nanoshells.
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).
Zhang
Hua
H
Department of Materials Science and Engineering, University of California, Los Angeles, 90095, USA.
Li
Yujing
Y
Ivanov
Ivan A
IA
Qu
Yongquan
Y
Huang
Yu
Y
Duan
Xiangfeng
X
D005453:Fluorescence; D005459:Fluorides / Q000138:chemical synthesis / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D057145:Nanoshells / Q000737:chemistry*; D013932:Thulium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
C525362:sodium yttriumtetrafluoride; D015019:Yttrium; D006046:Gold; D013932:Thulium; D015018:Ytterbium; D005459:Fluorides