A method for the sensitive and selective determination of Hg2+ was developed based on the aggregation and re-aggregation of silver nanorods (SNRs) in the presence of dithiothreitol.

Amitava Mukherjee

Centre for Nanobiotechnology

Vellore Campus

Chandra Sekaran N

Karthiga D

Rajeshwari A

Chakravarty S

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Analytical Methods

In this paper, inorganic mercury (Hg2 + ion) interaction with different shaped silver nanoparticles (silver nanorods (SNRs) and silver nanotriangles (SNTs)) at pH- 5 was investigated. We observed that the interaction of different concentrations of Hg2 + ions with citrate-stabilized SNRs and SNTs induced significant changes in the shape and absorption spectra of the nanoparticles. In particular, we correlated the position and shape of LSPR peaks to the ability of the Hg2 + ions to specifically interact with SNR and SNT surface. The change in morphology of SNRs and SNTs upon interaction with Hg2 + ions was studied through TEM analysis. The limit of detection of Hg2 + ions by SNRs and SNTs was observed to be 0.26 and 0.3 nM in the range of 1 to 50 nM concentrations of Hg2 + ions. The selectivity of the probe for both the types of nanoparticles was also studied towards Hg2 + ions. © 2017 Elsevier B.V.

Journal of Molecular Liquids

Comparative studies on interaction of inorganic mercury with silver nanorods and nanotriangles

Fulltext

Applied Nanoscience

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

Carboxymethyl guargum-g-poly(acrylic acid)-co-poly(divinyl benzene), bCMGG-g-HBPAA, having an unprecedented hyperbranched architecture is developed. A combination of a polymer grafting technique and "Strathclyde methodology" in emulsion is followed for the first time in the synthesis of bCMGG-g-HBPAA. FTIR, NMR, intrinsic viscosity and linear viscoelasticity studies confirm the microstructure of bCMGG-g-HBPAA. Owing to the unique properties of polysaccharide and hyperbranched chains, bCMGG-g-HBPAA successfully stabilizes monodispersed silver nanoparticles (AgNPs-HB) of size 27 nm and with good optical clarity. AgNPs-HB forms an amalgam in the presence of Hg2+ and thus facilitates colorimetric detection/accurate estimation of Hg2+ (up to 1 ppb). Furthermore, for the first time it is shown that the specificity and sensitivity of AgNPs-HB based sensors towards Hg2+ sensing can be enhanced in the presence of Na salt catalysts. The working principle of AgNPs-HB and AgNPs-HB/Na salt(s) based sensors for Hg2+ is explained through UV-Vis, XRD, HRTEM and CV studies. © 2017 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

New Journal of Chemistry

Exploration of carboxymethyl guargum grafted hyperbranched poly(acrylic acid) as a scaffold for silver nanoparticles for ultrafast and selective sensing of Hg(ii)

The estimation of Hg2+ in a buffer system (Tris buffer; pH 7.4) has been performed using a novel, enzyme-based, indirect detection method with the aid of non-functionalized AgNPs.

An ultrasensitive colorimetric sensor for efficient detection of Hg2+ at physiological pH

Microchimica Acta

A colorimetric silver nanoparticle-based assay for Hg(II) using lysine as a particle-linking reagent

Scientific Reports

Ultrasensitive Quantum Dot Fluorescence quenching Assay for Selective Detection of Mercury Ions in Drinking Water

Developments in Surface Contamination and Cleaning

Physical Chemistry Chemical Physics

Structural characterization of functionalized gold nanoparticles for drug delivery in cancer therapy: a NMR based approach

Determination of mercury(ii) ions in aqueous solution using silver nanorods as a probe

Journal	Data powered by TypesetAnalytical Methods
Publisher	Data powered by TypesetRoyal Society of Chemistry (RSC)
ISSN	1759-9660
Open Access	0