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Jayapandi S, Soundarrajan P, Kumar SS, Lakshmi D, Albaqami MD, Ouladsmane M, Mani G. Efficient Z-scheme LaCoO3/In2O3 heterostructure photocatalyst for fast dye degradation under visible light irradiation. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04832-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Chen Z, Li B, Liu J, Li H, Li C, Xuan X, Li M. A label-free electrochemical immunosensor based on a gold-vertical graphene/TiO 2 nanotube electrode for CA125 detection in oxidation/reduction dual channels. Mikrochim Acta 2022; 189:257. [PMID: 35701556 DOI: 10.1007/s00604-022-05332-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/09/2022] [Indexed: 02/07/2023]
Abstract
A label-free immunosensor was constructed in oxidation and reduction dual channel mode for the trace detection of cancer antigen 125 (CA125) in serum. The gold-vertical graphene/titanium dioxide (Au-VG/TiO2) electrode was used as the signal-amplification platform, and cytosine and dopamine were used as probes in the oxidation and reduction channels, respectively. VG nanosheets were synthesized on a TiO2 nanotube array via chemical vapor deposition (CVD), and Au nanoparticles were deeply embedded on the surface and in the root of the VG nanosheets via electrodeposition. The CA125 antibody was then directly immobilized onto the electrode surface, benefitting from its natural affinity for Au nanoparticles. In the oxidation and reduction channels the CA125 antibody-Au-VG/TiO2 immune electrode had the same response concentration range (0.01-1000 mU∙mL-1) for the determination of the CA125 antigen. However, the oxidation channel had a higher sensitivity (14.82 μA•(log(mU•mL-1))-1 at a working potential of ~ 1.25 V vs. SCE), lower detection limit (0.0001 mU∙mL-1), higher stability, and lower performance deviation than the reduction channel. This immunosensor was successfully used for CA125 detection in human serum. The recoveries of spiked serum samples ranged from 99.8 ± 0.5 to 100 ± 0.4%. The study on the difference in the sensing performance between oxidation and reduction channels provides a preliminary experimental reference for exploring dual-channel synchronous detection immunosensors and verifying the accuracy of the assay based on dual-channel data, which will promote the development of reliable electrochemical immunosensor technology.
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Affiliation(s)
- Zehua Chen
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China
| | - Bingbing Li
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China
| | - Jinbiao Liu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China.
| | - Hongji Li
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China.
| | - Cuiping Li
- Tianjin Key Laboratory of Film Electronic and Communication Devices, Engineering Research Center of Optoelectronic Devices & Communication Technology (Ministry of Education), School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China
| | - Xiuwei Xuan
- Tianjin Key Laboratory of Film Electronic and Communication Devices, Engineering Research Center of Optoelectronic Devices & Communication Technology (Ministry of Education), School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China
| | - Mingji Li
- Tianjin Key Laboratory of Film Electronic and Communication Devices, Engineering Research Center of Optoelectronic Devices & Communication Technology (Ministry of Education), School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin, 300384, People's Republic of China.
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Wang ZZ, Wu PF, Yue HY, Gao X, Ma YY, Ma YY, Guo XR, Zhang HP. Electrochemical Determination of Levodopa Using Zinc Sulfide Nanospheres-Reduced Graphene Oxide. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2021; 21:5666-5672. [PMID: 33980378 DOI: 10.1166/jnn.2021.19486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Zinc sulfide nanospheres (ZnS NSs) were prepared by hydrothermal synthesis and graphene oxide (GO) was prepared by the Hummer's method. ZnS NSs-rGO/ITO electrode was synthesized by heat treatment at a certain temperature, which was used for the detailed electrochemical determination of levodopa (LD). Finally, they were annealed to form the ZnS NSs-rGO/ITO electrode for detecting levodopa (LD). The results reveal that the ZnS NSs with the diameter of ~1 μm are covered by rGO. The ZnS NSs-rGO/ITO electrode has a good sensitivity of 1.43 μA μM -1 for the determination of LD in the concentration range of 1-40 μM. Moreover, it also shows a good selectivity, reproducibility and stability. In order to verify the practicability, we also use the electrode to detect LD in human serum. The detection results also prove that the electrode can be used in real life.
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Affiliation(s)
| | - P F Wu
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - H Y Yue
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - X Gao
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - Y Y Ma
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - Y Y Ma
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - X R Guo
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
| | - H P Zhang
- School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China
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Shenbagapushpam M, Muthukumar T, Paulpandian MM, Kodirajan S. Synthesis and electro-catalytic evaluation of Ti(IV)-anchored heterogeneous mesoporous material for uric acid analysis. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Danvirutai P, Ekpanyapong M, Tuantranont A, Bohez E, Anutrakulchai S, Wisitsoraat A, Srichan C. Ultra-sensitive and label-free neutrophil gelatinase-associated lipocalin electrochemical sensor using gold nanoparticles decorated 3D Graphene foam towards acute kidney injury detection. SENSING AND BIO-SENSING RESEARCH 2020. [DOI: 10.1016/j.sbsr.2020.100380] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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