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Zheng C, Liu R, Chen J, Li S, Ling Y, Zhang Z. Development of a selective electrochemical microsensor based on molecularly imprinted polydopamine/ZIF-67/laser-induced graphene for point-of-care determination of 3-nitrotyrosine. Biosens Bioelectron 2024; 255:116246. [PMID: 38537430 DOI: 10.1016/j.bios.2024.116246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/22/2024] [Accepted: 03/23/2024] [Indexed: 04/15/2024]
Abstract
3-nitrotyrosine (3-NT) is a biomarker closely associated with the early diagnosis of oxidative stress-related disorders. The development of an accurate, cost-effective, point-of-care 3-NT sensor holds significant importance for self-monitoring and clinical treatment. In this study, a selective, sensitive, and portable molecularly imprinted electrochemical sensor was developed. ZIF-67 with strong adsorption capacity was facilely modified on an electrochemically active laser-induced graphene (LIG) substrate (formed ZIF-67/LIG). Subsequently, biocompatible dopamine was chosen as the functional monomer, and interference-free ʟ-tyrosine was used as the dummy template to create molecularly imprinted polydopamine (MIPDA) on the ZIF-67/LIG, endowing the sensor with selectivity. The morphologies, electrochemical properties, and detection performance of the sensor were comprehensively investigated using scanning electron microscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. To achieve the best performance, several parameters were optimized, including the number of polymerization cycles (15), elution time (60 min), incubation time (7 min), and pH of the buffer solution (6). The turnaround time for this sensor is 10 min. Benefiting from the alliance of MIPDA, ZIF-67, and LIG, the sensor exhibited excellent sensitivity with a detection limit of 6.71 nM, and distinguished selectivity against 11 interfering substances. To enable convenient clinical diagnosis, a customized electrochemical microsensor with MIPDA/ZIF-67/LIG was designed, showcasing excellent reliability and convenience in detecting biological samples without pretreatment. The proposed microsensor will not only facilitate clinical diagnosis and improve patient care, but also provide inspiration for the development of other portable and accurate electrochemical biosensors.
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Affiliation(s)
- Chibin Zheng
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China
| | - Ruwei Liu
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China
| | - Jianyue Chen
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China; Institute of New Functional Materials Co., Ltd, Guangxi Institute of Industrial Technology, Nanning, 530200, PR China
| | - Shilin Li
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China
| | - Yunhan Ling
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China.
| | - Zhengjun Zhang
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, PR China
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Jiang H, Cheng J, He J, Pu C, Huang X, Chen Y, Lu X, Lu Y, Zhang D, Wang Z, Leng Y, Chu PK, Luo Y. Cobalt-Nickel Layered Double Hydroxides on Electrospun MXene for Superior Asymmetric Supercapacitor Electrodes. ACS OMEGA 2023; 8:49017-49026. [PMID: 38162737 PMCID: PMC10753703 DOI: 10.1021/acsomega.3c06674] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 01/03/2024]
Abstract
Flexible electrodes for energy storage and conversion require a micro-nanomorphology and stable structure. Herein, MXene fibers (MX-CNF) are fabricated by electrospinning, and Co-MOF nanoarrays are prepared on the fibers to form Co-MOF@MX-CNF. Hydrolysis and etching of Co-MOF@MX-CNF in the Ni2+ solution produce cobalt-nickel layered double hydroxide (CoNi-LDH). The CoNi-LDH nanoarrays on the MX-CNF substrate have a large specific surface area and abundant electrochemical active sites, thus ensuring effective exposure of the CoNi-LDH active materials to the electrolyte and efficient pseudocapacitive energy storage and fast reversible redox kinetics for enhanced charging-discharging characteristics. The CoNi-LDH@MX-CNF electrode exhibits a discharge capacity of 996 F g-1 at a current density of 1 A g-1 as well as 78.62% capacitance retention after 3,000 cycles at 10 A g-1. The asymmetric supercapacitor (ASC) comprising the CoNi-LDH@MX-CNF positive electrode and negative activated carbon electrode shows an energy density of 48.4 Wh kg-1 at a power density of 499 W kg-1 and a capacity retention of 78.9% after 3,000 cycles at a current density of 10 A g-1. Density-functional theory calculations reveal the charge density difference and partial density of states of CoNi-LDH@MX-CNF confirming the large potential of the CoNi-LDH@MX-CNF electrode in energy storage applications.
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Affiliation(s)
- Hao Jiang
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Jinbing Cheng
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Junbao He
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Chunying Pu
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Xiaoyu Huang
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Yichong Chen
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Xiaohong Lu
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
| | - Yang Lu
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
| | - Deyang Zhang
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
| | - Zhaorui Wang
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
| | - Yumin Leng
- School
of Mathematics and Physics, Anqing Normal
University, Anqing 246133, P. R. China
| | - Paul K. Chu
- Department
of Physics, Department of Materials Science & Engineering, and
Department of Biomedical Engineering, City
University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Yongsong Luo
- Henan
International Joint Laboratory of MXene Materials Microstructure,
College of Physics and Electronic Engineering, Nanyang Normal University, Nanyang 473061, P. R. China
- Key
Laboratory of Microelectronics and Energy of Henan Province, Engineering
Research Center for MXene Energy Storage Materials of Henan Province,
Henan Joint International Research Laboratory of New Energy Storage
Technology, Xinyang Normal University, Xinyang 464000, P. R. China
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