Modified Gold Nanoparticles for the Temperature-Dependent Colorimetric Detection of Mercury and Methylmercury

Margaret L. Aulsebrook; Ethan Watkins; Michael R. Grace; Bim Graham; Kellie L. Tuck

doi:10.1002/slct.201702572

Modified Gold Nanoparticles for the Temperature-Dependent Colorimetric Detection of Mercury and Methylmercury

Margaret L. Aulsebrook, Ethan Watkins, Michael R. Grace, Bim Graham, Kellie L. Tuck

Research output: Contribution to journal › Article › Research › peer-review

5 Citations (Scopus)

Abstract

A method for temperature-dependent sensing of both inorganic mercury (Hg²⁺) and organic methyl mercury (MeHg⁺) with the same gold nanoparticle (AuNP) system was achieved. The AuNPs were functionalised with a thymine moiety and aggregation was achieved through binding of a single mercuric species between two thymine molecules on the surface of the nanoparticles. Both Hg²⁺ and MeHg⁺ caused a significant change in the visible absorbance spectrum, resulting in a colour change from red to blue. Significantly, the two mercuric species produced different hues of blue, distinguishable by eye. This method could lead to the development of a method for tandem detection of Hg²⁺ and MeHg⁺ in environmental samples.

Original language	English
Pages (from-to)	2088-2091
Number of pages	4
Journal	ChemistrySelect
Volume	3
Issue number	7
DOIs	https://doi.org/10.1002/slct.201702572
Publication status	Published - 21 Feb 2018

Keywords

colorimetric assay
gold nanoparticle
mercury(II)
methyl mercury
thymine

Access to Document

10.1002/slct.201702572

Link to publication in Scopus

Cite this

Aulsebrook, M. L., Watkins, E., Grace, M. R., Graham, B., & Tuck, K. L. (2018). Modified Gold Nanoparticles for the Temperature-Dependent Colorimetric Detection of Mercury and Methylmercury. ChemistrySelect, 3(7), 2088-2091. https://doi.org/10.1002/slct.201702572

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