Rapid colorimetric detection of mercury using biosynthesized gold nanoparticles

Zohora, N, Kumar, D, Yazdani, M, Rotello, V, Ramanathan, R and Bansal, V 2017, 'Rapid colorimetric detection of mercury using biosynthesized gold nanoparticles', Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 532, pp. 451-457.


Document type: Journal Article
Collection: Journal Articles

Title Rapid colorimetric detection of mercury using biosynthesized gold nanoparticles
Author(s) Zohora, N
Kumar, D
Yazdani, M
Rotello, V
Ramanathan, R
Bansal, V
Year 2017
Journal name Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume number 532
Start page 451
End page 457
Total pages 7
Publisher Elsevier BV
Abstract There is an increasing focus on expanding the applicability of biologically synthesized nanomaterials. Herein, we show the use of Cinnamomum tamala (cinnamon) leaf extract for the synthesis of gold nanoparticles with controllable optical properties. This ability to synthesize optically tunable AuNPs was exploited for the detection of mercuric ions (Hg2+) by capitalizing upon the amalgamation tendency of mercury with gold. The changes in both the longitudinal and transverse plasmon absorption bands of gold nanoparticles (AuNPs) suggest the potential of using both of these SPR features either independently using traditional analyses or in combination using discriminant analysis for the detection of mercury in aqueous media. Minimal cross-reactivity with other environmentally relevant metal ions confirms that the change in the optical property is exclusively due to the strong amalgamation of mercury and gold. Natural plant-based esters were found to act as capping agents during biological synthesis of AuNPs, and the involvement of these esters during Hg2+ ions sensing revealed underlying mechanistic processes.
Subject Sensor Technology (Chemical aspects)
Nanomaterials
Nanobiotechnology
Keyword(s) Biosynthesis
Gold nanoparticles
Hg ion 2+
Plant
Sensing
SPR
DOI - identifier 10.1016/j.colsurfa.2017.04.036
Copyright notice © 2017 Elsevier B.V. All rights reserved.
ISSN 0927-7757
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