The Effect of electrodeposition parameters and morphology on the performance of Au nanostructures for the detection of As (III)

Ren, B, Jones, L, Chen, M, Oppedisano, D, Qiu, D, Ippolito, S and Bhargava, S 2017, 'The Effect of electrodeposition parameters and morphology on the performance of Au nanostructures for the detection of As (III)', Journal of the Electrochemical Society, vol. 164, no. 14, pp. 1121-1128.


Document type: Journal Article
Collection: Journal Articles

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Title The Effect of electrodeposition parameters and morphology on the performance of Au nanostructures for the detection of As (III)
Author(s) Ren, B
Jones, L
Chen, M
Oppedisano, D
Qiu, D
Ippolito, S
Bhargava, S
Year 2017
Journal name Journal of the Electrochemical Society
Volume number 164
Issue number 14
Start page 1121
End page 1128
Total pages 8
Publisher Electrochemical Society, Inc.
Abstract A series of Au nanospikes and dendrites were electrodeposited with either an inorganic (Pb2+) or organic (cysteine) growth directing agent for different times to obtain varied morphology. These structureswere comparedwith gold nanoparticles of three different shapes (Octahedral, Cubic and Rhombic Dodecahedral) for detection of As (III) by SquareWave Anodic Stripping Voltammetry (SWASV). The sensitivity and limit of detection (LOD) was dependent on the surface crystallographic orientations and the morphology, with superior sensitivity confirmed with a maximum amount of Au (111) facets on the surface for the nanoparticles. XRD studies suggested that the shape directing influence of Pb2+is lost on the gold nanospikes at higher deposition time, and that the size of the (111) terraces on the polycrystalline surfaces decreased, which led to a loss of performance. For gold dendrites, as the cysteine maintained shape directing behavior through hierarchical dendritic branching, deposition time did not affect the sensitivity. The study confirms that electrodeposition parameters or nanoparticle synthesis methods for Au surfaces in arsenic sensing needs to be carefully controlled, to either maximize the (111) facets, or minimize the steps on a polycrystalline Au surface, and that inorganic and organic shape directing agents will have differing effects.
Subject Electrochemistry
Hydrometallurgy
DOI - identifier 10.1149/2.1261714jes
Copyright notice © The Author(s) 2017. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
ISSN 0013-4651
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