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Issue 18, 2016

Silver nanoparticles as highly efficient and selective optical probe for sulphide via dendrimer formation in aqueous medium

Author affiliations

Abstract

We herein report a highly efficient, cost effective, convenient as well as selective colorimetric probe for sulphide (S2−) in the form of silver nanoparticles (AgNPs) capped by an azonaphthol viz. 1-[(4-nitrophenyl)azo]-2-naphthol. A naked eye color change from bright yellow to colorless was observed upon the addition of S2− to the AgNPs. A remarkable feature of this probe is the unique morphological transition of spherical AgNPs to dendritic architecture induced by S2−. Although dendritic AgNPs have been reported previously also by many workers through various methods. Here we are presenting a probe that not only selectively recognises S2− colorimetrically but at the same time paves the way for the self-assembled dendritic structure of AgNPs. The lowest detection limit for S2− was found to be 67 nM which is much lower than the maximum endurable level (15 μM) of S2− in drinking water by World Health Organisation (WHO).

Graphical abstract: Silver nanoparticles as highly efficient and selective optical probe for sulphide via dendrimer formation in aqueous medium

Supplementary files

Article information


Submitted
02 Dec 2015
Accepted
24 Jan 2016
First published
27 Jan 2016

RSC Adv., 2016,6, 14563-14569
Article type
Paper

Silver nanoparticles as highly efficient and selective optical probe for sulphide via dendrimer formation in aqueous medium

I. Sanskriti and K. K. Upadhyay, RSC Adv., 2016, 6, 14563 DOI: 10.1039/C5RA25625A

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