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Issue 27, 2015
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Lysine and dithiothreitol promoted ultrasensitive optical and colorimetric detection of mercury using anisotropic gold nanoparticles

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Abstract

Using lysine (Lys) and dithiothreitol (DTT) as aggregation promoters, an ultrasensitive and highly selective colorimetric assay for detection of mercury (Hg2+) ions has been developed with anisotropic gold nanoparticles (GNP). The detection limit of the assay is determined to be 27 pM and 58 pM for Hg2+ in deionized water and tap water, respectively. The mechanism of sensing is explained on the basis of possible mercury-gold amalgam formation and subsequent aggregation of the GNP upon addition of Lys and DTT. The kinetics data indicate that the sensor can be effectively used for on-site and real-time Hg2+ detection.

Graphical abstract: Lysine and dithiothreitol promoted ultrasensitive optical and colorimetric detection of mercury using anisotropic gold nanoparticles

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Publication details

The article was received on 16 May 2015, accepted on 07 Jun 2015 and first published on 08 Jun 2015


Article type: Communication
DOI: 10.1039/C5TC01397F
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J. Mater. Chem. C, 2015,3, 6962-6965

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    Lysine and dithiothreitol promoted ultrasensitive optical and colorimetric detection of mercury using anisotropic gold nanoparticles

    A. Chaudhary, C. Dwivedi, M. Chawla, A. Gupta and C. K. Nandi, J. Mater. Chem. C, 2015, 3, 6962
    DOI: 10.1039/C5TC01397F

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