Gu, Xiao Ying Liu, Jia Jun Gao, Peng Fei Li, Yuan Fang Huang, Cheng Zhi Gold Triangular Nanoplates Based Single-Particle Dark-Field Microscopy Assay of Pyrophosphate 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 Cu<sup>2+</sup> and I<sup>–</sup> 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. surface plasmon resonance;LSPR;PPi;intensity;Single-Particle Dark-Field Microscopy Assay;copper ions;gold Triangular Nanoplates;AuNPL;DFM;etching 2019-12-03
    https://acs.figshare.com/articles/journal_contribution/Gold_Triangular_Nanoplates_Based_Single-Particle_Dark-Field_Microscopy_Assay_of_Pyrophosphate/11310491
10.1021/acs.analchem.9b04093.s001