ArticleMikrochimica acta2018
Colorimetric determination of mercury(II) using gold nanoparticles and double ligand exchange.
Article in Mikrochimica acta, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Recent Advances in the Application of Bionanosensors for the Analysis of Heavy Metals in Aquatic Environments.Molecules (Basel, Switzerland) · 2023Review
- A Real-Time Detection Method of HgBiosensors · 2022Article
- Rapid color-fading colorimetric sensing of Hg in environmental samples: regulation mechanism from DNA dimension.Mikrochimica acta · 2022Article
- Simple and Equipment-Free Paper-Based Device for Determination of Mercury in Contaminated Soil.Molecules (Basel, Switzerland) · 2021Article
- Selective Fluorometric Analysis of Hg(II) in Industrial Waste Water Samples.Journal of fluorescence · 2020Article
- L-Cysteine modified gold nanoparticles for tube-based fluorometric determination of mercury(II) ions.Mikrochimica acta · 2019Article
- Plasmonic nanoprobes based on the shape transition of Au/Ag core-shell nanorods to dumbbells for sensitive Hg-ion detection.RSC advances · 2019Article
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Authors and funding
11 authors.
Funding
Abstract
A colorimetric assay is described for highly selective and sensitive determination of Hg(II) ions by using gold nanoparticles (AuNPs) functionalized with dithioerythritol (DETL). This method relies on the unique optical properties of DETL-functionalized AuNPs as well as the thiophilicity of both AuNPs and Hg(II). In the presence of DETL, the AuNPs aggregate due to ligand exchange between thiol groups of DETL and the citrate ions on the surface of AuNPs. This induces a color change from red to blue. On addition of Hg(II), the thiol groups preferably interact with Hg(II) rather than with AuNPs. Thus, the DETL is released from the surface of the AuNPs and binds to Hg(II). This triggers the redispersion of the AuNPs. The ratio of absorbances at 650 and 525 nm drops linearly in two Hg(II) concentration ranges (viz. from 0.1 to 0.5 μM, and from 0.5 to 5 μM). The ions Cu(II), Pb(II), and Cd(II) do not interfere even in the absence of masking agents. The detection limit is as low as 24 nM. Graphical abstract A highly selective colorimetric method based on gold nanoparticles via double ligand exchange reaction is described for determination of Hg
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