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Nsabimana J, Wang Y, Ruan Q, Li T, Shen H, Yang C, Zhu Z. An electrochemical method for a rapid and sensitive immunoassay on digital microfluidics with integrated indium tin oxide electrodes coated on a PET film. Analyst 2021; 146:4473-4479. [PMID: 34227625 DOI: 10.1039/d1an00513h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Electrochemical detection is the simplest analytical tool to be integrated into digital microfluidics (DMF). It offers the advantages of small size, with detector electrodes incorporated into the device by patterning, and high compatibility with portable analytical instruments. Indium tin oxide (ITO) coated on glass has been commonly used for the top plate of DMF due to its good conductivity and transparency. However, instability and the low current response of ITO electrodes patterned on glass hindered their application for immunoassays. It has been reported that ITO coated on polyethylene terephthalate (PET) has better conductivity, owing to its higher carrier concentration, faster mobility and lower resistivity. Herein, we investigated the use of ITO electrodes patterned on PET film as the top plate of DMF for a simple and stable electrochemical immunoassay using square wave voltammetry (SWV), with an excellent peak resolution and high sensitivity. A magnetic bead-based immunoassay for H5N1 antigen was performed on a DMF platform with a limit of detection of 0.6 ng mL-1 in buffer and 18 ng mL-1 in human serum. These results showed the good electrochemical performance of ITO coated on a PET film, a lightweight, shock resistant and cost-effective material, which is promising for DMF fabrication and transparent electrodes for various electroanalytical methods.
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Affiliation(s)
- Jacques Nsabimana
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China.
| | - Yang Wang
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China.
| | - Qingyu Ruan
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China.
| | - Tingyu Li
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China.
| | - Haicong Shen
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China.
| | - Chaoyong Yang
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China. and Institute of Molecular Medicine, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, P.R. China
| | - Zhi Zhu
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, The key Laboratory of Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, P.R. China.
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Ly SY, Lee CH, Koo JM. Detection of Toxic Heavy Metal, Co(II) Trace via Voltammetry with Semiconductor Microelectrodes. Toxicol Res 2017; 33:135-140. [PMID: 28503262 PMCID: PMC5426505 DOI: 10.5487/tr.2017.33.2.135] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/26/2017] [Accepted: 01/27/2017] [Indexed: 11/20/2022] Open
Abstract
The cobalt (Co(II)) ion is a main component of alloys and considered to be carcinogenic, especially due to the carcinogenic and toxicological effects in the aquatic environment. The toxic trace of the Co(II) detection was conducted using the infrared photodiode electrode (IPDE) using a working electrode, via the cyclic and square-wave anodic stripping voltammetry. The results indicated a sensitive oxidation peak current of Co(II) on the IPDE. Under the optimal conditions, the common-type glassy carbon, the metal platinum, the carbon paste, and the carbon fiber microelectrode were compared with the IPDE in the electrolyte using the standard Co(II). The IPDE was found to be far superior to the others.
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Affiliation(s)
- Suw Young Ly
- Biosensor Research Institute, Seoul National University of Science and Technology, Seoul,
Korea
| | - Chang Hyun Lee
- Department of Integrated Environmental Systems, Pyeongtaek University, Pyeongtaek,
Korea
| | - Jae Mo Koo
- Asia Pacific International School, Seoul,
Korea
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Li M, Liu B, Ji N, Sun Y, Han W, Jiang T, Peng S, Yan Y, Zhang M. Electrochemical extracting variable valence ytterbium from LiCl–KCl–YbCl3 melt on Cu electrode. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Xue Y, Zhou ZP, Yan YD, Zhang ML, Li X, Ji DB, Tang H, Zhang ZJ. Electrochemistry of Zn and co-reduction of Zn and Sm from LiCl–KCl melt. RSC Adv 2015. [DOI: 10.1039/c4ra16014b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
SEM image and element mapping analysis of Zn–Sm alloy obtained by galvanostatic electrolysis.
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Affiliation(s)
- Yun Xue
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory
- Harbin Engineering University
- Harbin 150001
- P. R. China
- Key Laboratory of Superlight Materials and Surface Technology
| | - Zhi-Ping Zhou
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001
| | - Yong-De Yan
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory
- Harbin Engineering University
- Harbin 150001
- P. R. China
- Key Laboratory of Superlight Materials and Surface Technology
| | - Mi-Lin Zhang
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001
| | - Xing Li
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001
| | - De-Bin Ji
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001
| | - Hao Tang
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Materials Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001
| | - Zhi-Jian Zhang
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory
- Harbin Engineering University
- Harbin 150001
- P. R. China
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Jiao S, Zhu H. An investigation into the electrochemical recovery of rare earth ions in a CsCl-based molten salt. JOURNAL OF HAZARDOUS MATERIALS 2011; 189:821-826. [PMID: 21458160 DOI: 10.1016/j.jhazmat.2011.03.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Revised: 03/04/2011] [Accepted: 03/09/2011] [Indexed: 05/30/2023]
Abstract
A CsCl-based melt, was used as a supporting electrolyte for a fuel cycle in pyrochemical separation, as it has a high solubility for lanthanide oxide. Cyclic voltammetry and square wave voltammetry were carried out to investigate the cathodic reduction of those rare earth ions. The results prove that the cathodic process of La(III) ions dissolved in a CsCl-based melt, with a one-step reduction La(3+)+3e(-)=La, and is similar to those of other reports which have utilised LiCl-KCl or CaCl(2)-KCl molten salt systems. However, for the Ce(III) ions that dissolved in a CsCl-based melt, there is a significant difference when compared with published literature as there are two reduction steps instead of the reported single step Ce(3+)+e(-)=Ce(2+) and Ce(2+)+2e(-)=Ce. In order to explain the novel result, a detailed investigation was focused on the cathodic process of Ce(III) in a CsCl-based melt. The identification of the M-O (M=La, Ce) compounds that are stable in the electrolyte, as well as the determination of their solubility products, were carried out by potentiometric titration using an oxide ion sensor. Furthermore, the E-pO(2-) (potential-oxide ion) diagram for the M-O stable compound was constructed by combining both theoretical and experimental data.
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Affiliation(s)
- Shuqiang Jiao
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, PR China.
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