%0 Journal Article
%A Gu, Xiao Ying
%A Liu, Jia Jun
%A Gao, Peng Fei
%A Li, Yuan Fang
%A Huang, Cheng Zhi
%D 2019
%T Gold Triangular
Nanoplates Based Single-Particle Dark-Field
Microscopy Assay of Pyrophosphate
%U https://acs.figshare.com/articles/journal_contribution/Gold_Triangular_Nanoplates_Based_Single-Particle_Dark-Field_Microscopy_Assay_of_Pyrophosphate/11310491
%R 10.1021/acs.analchem.9b04093.s001
%2 https://acs.figshare.com/ndownloader/files/20046581
%K surface plasmon resonance
%K LSPR
%K PPi
%K intensity
%K Single-Particle Dark-Field Microscopy Assay
%K copper ions
%K gold Triangular Nanoplates
%K AuNPL
%K DFM
%K etching
%X Owing to the sharp edge-enhanced electric field, gold
triangular
nanoplates (AuNPLs) exhibit strong localized surface plasmon resonance
(LSPR) scattering and display as red spots with high intensity and
narrow distribution under dark-field microscopy (DFM), based on which
sensitive sensing applications could be developed. As a concept of
proof, the inhibition effects of pyrophosphate (PPi) against the etching
of AuNPLs based on Cu2+ and I– mediated
is dynamically monitored. The etching proceeding of AuNPLs by copper
ions and iodide ions leads to the gradually blue-shifted LSPR scattering
color of AuNPLs under DFM from the original red to green, accompanied
by the reduced LSPR scattering intensity. As a result of the strong
affinity of PPi to copper ions, the presence of PPi makes the etching
process greatly suppressed, thereby achieving sensitive detection
of the PPi.
%I ACS Publications