| 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 Author | Liu, Baodan(baodanliu@hotmail.com) |
| 2020-03-01 | |
| Source Publication | ANALYTICA CHIMICA ACTA
 |
| ISSN | 0003-2670 |
| Volume | 1100Pages:22-30 |
| Abstract | Driven 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. |
| Keyword | GaN micropillar arrays Homoepitaxial growth Electrochemistry Metal ion detection |
| Funding Organization | National 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 |
| DOI | 10.1016/j.aca.2019.11.010 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Chemistry |
| WOS Subject | Chemistry, Analytical |
| WOS ID | WOS:000509341100003 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136669 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Baodan |
| Affiliation | 1.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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