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Graphene nanodots-encaged porous gold electrode fabricated via ion beam sputtering deposition for electrochemical analysis of heavy metal ions

Zhu, Huihui, Xu, Yuanhong, Liu, Ao, Kong, Na, Shan, Fukai, Yang, Wenrong, Barrow, Colin J. and Liu, Jingquan 2015, Graphene nanodots-encaged porous gold electrode fabricated via ion beam sputtering deposition for electrochemical analysis of heavy metal ions, Sensors and actuators, b: chemical, vol. 206, pp. 592-600, doi: 10.1016/j.snb.2014.10.009.

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Title Graphene nanodots-encaged porous gold electrode fabricated via ion beam sputtering deposition for electrochemical analysis of heavy metal ions
Author(s) Zhu, Huihui
Xu, Yuanhong
Liu, Ao
Kong, Na
Shan, Fukai
Yang, WenrongORCID iD for Yang, Wenrong orcid.org/0000-0001-8815-1951
Barrow, Colin J.ORCID iD for Barrow, Colin J. orcid.org/0000-0002-2153-7267
Liu, Jingquan
Journal name Sensors and actuators, b: chemical
Volume number 206
Start page 592
End page 600
Total pages 9
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-01
ISSN 0925-4005
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Analytical
Electrochemistry
Instruments & Instrumentation
Chemistry
Graphene nanodots
Porous gold
OSWV
Heavy metal ion detection
Ion beam sputtering deposition
NANOPOROUS GOLD
THIN-FILMS
SELECTIVE DETECTION
OXIDE
PB2+
NANOPARTICLES
PERFORMANCE
REDUCTION
LEAD
NANOCOMPOSITES
Summary All rights reserved. A graphene nanodots-encaged porous gold electrode via ion beam sputtering deposition (IBSD) for electrochemical sensing is presented. The electrodes were fabricated using Au target, and a composite target of Al and graphene, which were simultaneously sputtered onto glass substrates by Ar ion beam, followed with hydrochloric acid corrosion. The as-prepared graphene nanodots-encaged porous gold electrodes were then used for the analysis of heavy metal ions, e.g. Cu2+ and Pb2+ by Osteryoung square wave voltammetry (OSWV). These porous electrodes exhibited enhanced detection range for the heavy metal ions due to the entrapped graphene nanodots in 3-D porous structure. In addition, it was also found that when the thickness of porous electrode reached 40 nm the detection sensitivity came into saturation. The linear detection range is 0.009-4 μM for Cu2+ and 0.006-2.5 μM for Pb2+. Good reusability and repeatability were also observed. The formation mechanism and 3-D structure of the porous electrode were also investigated using scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectra (XPS). This graphene entrapped 3-D porous structure may envision promising applications in sensing devices.
Language eng
DOI 10.1016/j.snb.2014.10.009
Field of Research 030302 Nanochemistry and Supramolecular Chemistry
0301 Analytical Chemistry
0912 Materials Engineering
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074234

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