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A Simple Strategy for Prompt Visual Sensing by Gold Nanoparticles: General Applications of Interparticle Hydrogen Bonds
Author(s) -
Lin ShuYi,
Wu SungHsun,
Chen Chunhsien
Publication year - 2006
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.200600771
Subject(s) - colloidal gold , naked eye , hydrogen bond , nanoparticle , nanotechnology , materials science , thioctic acid , crown ether , chemistry , molecule , organic chemistry , chromatography , detection limit , ion , lipoic acid , antioxidant
Local color : Gold nanoparticles (GNPs) bifunctionalized with a crown ether and thioctic acid can be used for the rapid sensing of a target analyte with the naked eye. A color transformation occurs when the interparticle hydrogen bonds of aggregated GNPs are broken forming a dispersion. For example, the detection of Pb II takes only 1 s (see picture).