Highly sensitive label-free colorimetric sensing of nitrite based on etching of gold nanorods

Highly sensitive label-free colorimetric sensing of nitrite based on etching of gold nanorods

A simple colorimetric method with high sensitivity and selectivity was developed for sensing of nitrite as low as 4.0 μM by naked eyes, which is based on etching of gold nanorods accompanied by shape changes in aspect ratios (length/width) and a visible color change from bluish green to red and then...

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Veröffentlicht in:Analyst (London) 2012-11, Vol.137 (22), p.5197-5200
Hauptverfasser: Chen, Zhaopeng, Zhang, Zhiyang, Qu, Chengli, Pan, Dawei, Chen, Lingxin
Format: Artikel
Sprache:eng
Schlagworte:
Analytical chemistry
Chemistry
Colorimetry
Exact sciences and technology
Gold - chemistry
Gold Compounds - chemistry
Ions - chemistry
Nanotubes - chemistry
Nitrites - analysis
Spectrometric and optical methods
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Zusammenfassung:A simple colorimetric method with high sensitivity and selectivity was developed for sensing of nitrite as low as 4.0 μM by naked eyes, which is based on etching of gold nanorods accompanied by shape changes in aspect ratios (length/width) and a visible color change from bluish green to red and then to colorless with the increase of nitrite.
ISSN:0003-2654
1364-5528
DOI:10.1039/c2an35787a