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Simultaneous detection of trace Ag(I) and Cu(II) ions using homoepitaxially grown GaN micropillar electrode
Liu, Qingyun1; Li, Jing1; Yang, Wenjin1; Zhang, Xinglai1; Zhang, Cai1; Labbe, Christophe2; Portier, Xavier2; Liu, Fei3,4; Yao, Jinlei5; Liu, Baodan1
Corresponding AuthorLiu, Baodan(baodanliu@hotmail.com)
2020-03-01
Source PublicationANALYTICA CHIMICA ACTA
ISSN0003-2670
Volume1100Pages:22-30
AbstractDriven by the motivation to quantitively control and monitor trace metal ions in water, the development of environmental-friendly electrodes with superior detection sensitivity is extremely important. In this work, we report the design of a stable, ultrasensitive and biocompatible electrode for the detection of trace Ag+ and Cu2+ ions by growing n-type GaN micropillars on conductive p-type GaN substrate. The electrochemical measurement based on cyclic voltammetry indicates that the GaN micropillars exhibit quasi-reversible and mass-controlled reaction in redox probe solution. In the application of trace Ag+ and Cu2+ determination, the GaN micropillars show superior sensitivity and excellent conductivity by presenting a detection limit of 3.3 ppb for Ag+ and 3.3 ppb for Cu2+. Comparative studies on the electrochemical response of GaN micropillars and GaN film in the simultaneous Ag+ and Cu2+ detection reveal that GaN micropillars show three orders of magnitude higher stripping peak current than GaN film. It is assumed that the microarray morphology with large active area and the hydrophilia nature of GaN micropillars are responsible for the excellent sensitivity. This work will open up some opportunities for GaN nanostructure electrodes in the application of trace metal ions detection. (C) 2019 Elsevier B.V. All rights reserved.
KeywordGaN micropillar arrays Homoepitaxial growth Electrochemistry Metal ion detection
Funding OrganizationNational Natural Science Foundation of China ; Open Fund of the State Key Laboratory of Optoelectronic Materials and Technologies (Sun Yat-sen University) ; Basic Science Innovation Program of Shenyang National Laboratory for Materials Science
DOI10.1016/j.aca.2019.11.010
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51702326,51872296] ; Open Fund of the State Key Laboratory of Optoelectronic Materials and Technologies (Sun Yat-sen University)[OEMT-2017-KF02] ; Basic Science Innovation Program of Shenyang National Laboratory for Materials Science[2017RP25]
WOS Research AreaChemistry
WOS SubjectChemistry, Analytical
WOS IDWOS:000509341100003
PublisherELSEVIER
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136669
Collection中国科学院金属研究所
Corresponding AuthorLiu, Baodan
Affiliation1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci SYNL, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Normandie Univ, CIMAP CNRS, CEA, ENSICAEN, 6 Bd Marechal Juin, F-14050 Caen 4, France
3.Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China
4.Sun Yat Sen Univ, Sch Elect & Informat Technol, Guangzhou 510275, Peoples R China
5.Suzhou Univ Sci & Technol, Sch Math & Phys, Jiangsu Key Lab Micro & Nano Heat Fluid Flow Tech, Suzhou 215009, Peoples R China
Recommended Citation
GB/T 7714
Liu, Qingyun,Li, Jing,Yang, Wenjin,et al. Simultaneous detection of trace Ag(I) and Cu(II) ions using homoepitaxially grown GaN micropillar electrode[J]. ANALYTICA CHIMICA ACTA,2020,1100:22-30.
APA Liu, Qingyun.,Li, Jing.,Yang, Wenjin.,Zhang, Xinglai.,Zhang, Cai.,...&Liu, Baodan.(2020).Simultaneous detection of trace Ag(I) and Cu(II) ions using homoepitaxially grown GaN micropillar electrode.ANALYTICA CHIMICA ACTA,1100,22-30.
MLA Liu, Qingyun,et al."Simultaneous detection of trace Ag(I) and Cu(II) ions using homoepitaxially grown GaN micropillar electrode".ANALYTICA CHIMICA ACTA 1100(2020):22-30.
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