The selective detection of Fe 3+ ions using citrate-capped gold nanoparticles

Citrate is a ubiquitous biological molecule that functions as Fe chelators in some bacteria and the blood plasma of humans. Inspired by the strong affinity between citrate and Fe , a colorimetric Fe probe based on citrate-capped AuNPs without any additional modification was designed. Citrate-capped...

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Veröffentlicht in:Analytical biochemistry 2022-01, Vol.637, p.114453
Hauptverfasser: Meng, Xinhua, Lei, Bijing, Qi, Na, Wang, Bochu
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Sprache:eng
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Zusammenfassung:Citrate is a ubiquitous biological molecule that functions as Fe chelators in some bacteria and the blood plasma of humans. Inspired by the strong affinity between citrate and Fe , a colorimetric Fe probe based on citrate-capped AuNPs without any additional modification was designed. Citrate-capped AuNPs with a diameter of 22 nm were applied to detect Fe without other reagents' assistance. This easily-prepared and low-cost colorimetric sensor exhibited good selectivity towards Fe among common metal ions, a good linear relationship in the range of 0.1-0.8 μM of Fe and quick response time of 10 min.
ISSN:1096-0309