Iodide-Mediated Etching of Gold Nanostar for the Multicolor Visual Detection of Hydrogen Peroxide

A multicolor visual method for the detection of hydrogen peroxide (H O ) was reported based on the iodide-mediated surface etching of gold nanostar (AuNS). First, AuNS was prepared by a seed-mediated method in a HEPES buffer. AuNS shows two different LSPR absorbance bands at 736 nm and 550 nm, respe...

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Bibliographic Details
Published in:Biosensors (Basel) 2023-05, Vol.13 (6), p.585
Main Authors: Lai, Yunping, Yu, Beirong, Lin, Tianran, Hou, Li
Format: Article
Language:English
Subjects:
Analysis
Biomarkers
Communication
Drinking water
Etching
Food
Gold
gold nanostar
H2O2
Hydrogen Peroxide
iodide
Iodides
Metal Nanoparticles
Nanoparticles
Optical properties
Oxidation
Potassium
Properties
Seeds
Water analysis
Water sampling
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Summary:A multicolor visual method for the detection of hydrogen peroxide (H O ) was reported based on the iodide-mediated surface etching of gold nanostar (AuNS). First, AuNS was prepared by a seed-mediated method in a HEPES buffer. AuNS shows two different LSPR absorbance bands at 736 nm and 550 nm, respectively. Multicolor was generated by iodide-mediated surface etching of AuNS in the presence of H O . Under the optimized conditions, the absorption peak Δλ had a good linear relationship with the concentration of H O with a linear range from 0.67~66.67 μmol L , and the detection limit is 0.44 μmol L . It can be used to detect residual H O in tap water samples. This method offered a promising visual method for point-of-care testing of H O -related biomarkers.
ISSN:2079-6374
2079-6374
DOI:10.3390/bios13060585