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Ag nanoparticle in situ decorated on Ti 3C 2T x with excellent SERS and EIS immunoassay performance for beta-human chorionic gonadotropin. Mikrochim Acta 2022; 189:348. [PMID: 36002597 DOI: 10.1007/s00604-022-05426-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/21/2022] [Indexed: 10/15/2022]
Abstract
Two-dimensional transition metal carbides, nitrides, and carbonitrides (MXene), with excellent optical and electrical properties, are promising substrates for surface-enhanced Raman scattering (SERS) and electrochemical sensors. Therefore, a unique 3D-decorated structure containing silver (Ag) nanoparticles and Ti3C2Tx was designed as the substrates of SERS and electrochemical impedance spectroscopy (EIS) immunosensors. The Ag/Ti3C2Tx composite significantly increases Raman intensity, which is attributed to the synergistic effect of Ti3C2Tx and Ag nanoparticles. Based on the SERS performance of the Ag/Ti3C2Tx composite, the magnetic properties of Fe3O4 and the specificity of antigen-antibody, a sandwich-structured SERS immunosensor is constructed, which can effectively detect trace amounts of beta-human chorionic gonadotropin (β-hCG). The SERS immunosensor exhibits a wide linear range of 5.0 × 10-6-1.0 mIU mL-1, and a low detection limit of 9.0 × 10-7 mIU mL-1. Meanwhile, the Ag/Ti3C2Tx-based EIS immunosensor is constructed for the portable detection of β-hCG, which exhibits a wide linear range of 5.0 × 10-2-1.0 × 102 mIU mL-1, a low detection limit of 9.5 × 10-3 mIU mL-1. Moreover, two immunosensors can be used to detect actual serum samples with satisfactory recovery (98.5-102.2%). This work could guide the design of low-cost, sensitive, flexible, and portable biosensors. The SERS and EIS substrates composited with Ti3C2Tx and Ag nanoparticles enable excellent performance for detecting β-hCG.
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Lin S, Zhong J, Chi Y, Chen Y, Khan MS, Shen J. Colorimetric immunosensor based on glassy carbon microspheres test strips for the detection of prostate-specific antigen. Mikrochim Acta 2021; 188:366. [PMID: 34617126 DOI: 10.1007/s00604-021-04907-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/19/2021] [Indexed: 10/20/2022]
Abstract
Micro-sized glassy carbon microspheres (GCMs, typically 3 μm in diameter) instead of nano-sized gold nanoparticles (AuNPs, typically 20 nm in diameter) were for the first time used as signal markers for the quantitative detection of antigen such as prostate-specific antigen (PSA). After being treated with concentrated HNO3, GCMs bear carboxyl groups at their surfaces, which enables antibodies to be conjugated with GCMs to yield new type of micro-sized material-based colorimetric probes used for immunochromatographic test strips (ICTSs). The captured black GCMs (with strong and wide-band light absorption) on the T-line of ICTS were used both for qualitative and quantitative determination of PSA. In the case of quantitative determination, a lab-assembled optical strip reader system was used to measure the reflected LED light intensity at 550 nm. The sensing performances of the developed GCM-based ICTSs, such as sensitivity, selectivity, reproducibility, stability, and applicability, were investigated in detail. The developed GCM-based ICTSs can have much higher (3 times) detection sensitivity than AuNP-based ICTSs, showing promising applications in sensitive immunoassay.
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Affiliation(s)
- Shan Lin
- MOE Key Laboratory of Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Jiangyan Zhong
- MOE Key Laboratory of Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Yuwu Chi
- MOE Key Laboratory of Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and College of Chemistry, Fuzhou University, Fuzhou, 350108, China.
| | - Yipeng Chen
- MOE Key Laboratory of Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Malik Saddam Khan
- MOE Key Laboratory of Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and College of Chemistry, Fuzhou University, Fuzhou, 350108, China
| | - Jianzhen Shen
- Department of Hematology, Fujian Institute of Hematology, Union Hospital of Fujian Medical University, Fuzhou, 350001, Fujian, China.
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Abstract
Human chorionic gonadotropin (HCG) is a glycoprotein secreted by placental trophoblast cells in pregnancy. HCG is a heterodimer composed of two different α- and β-subunits, with the latter being unique to HCG. As well as being the most important diagnostic markers for pregnancy, HCG is also a tumor marker, therefore, quantitative detection of HCG is of great value. Numerous advanced technologies have been developed for HCG concentration detection including electrochemical immunoassay, chemiluminescent immunoassay, fluorescence immunoassay, resonance scattering spectrometry, atomic emission spectrometry, radioimmunoassay, MS and so on. Some have pursued simple and easy operation, while others have emphasized on accuracy and applications in clinical medicine. This review provides a comprehensive summary of various methods of detecting HCG.
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Stability of fluorescent labels in PLGA polymeric nanoparticles: Quantum dots versus organic dyes. Int J Pharm 2015; 494:471-8. [DOI: 10.1016/j.ijpharm.2015.08.050] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 08/15/2015] [Accepted: 08/17/2015] [Indexed: 11/22/2022]
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Liu Y, Guo W, Qin X, Meng X, Zhu X, Wang J, Pei M, Wang L. Sensitive sandwich electrochemical immunosensor for human chorionic gonadotropin using nanoporous Pd as a label. RSC Adv 2014. [DOI: 10.1039/c4ra02117g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
GNPs/PB/GNPs and NP-Pd were prepared to immobilize Ab1 and HRP–Ab2 respectively and combined to construct a sandwich-type immunosensor for hCG.
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Affiliation(s)
- Yiming Liu
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Wenjuan Guo
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Xiaoli Qin
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Xue Meng
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Xiangwei Zhu
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Jinping Wang
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Meishan Pei
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Luyan Wang
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
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Guo W, Liu Y, Meng X, Pei M, Jinping Wang JW, Wang L. A novel signal amplification strategy of an electrochemical immunosensor for human chorionic gonadotropin, based on nanocomposites of multi-walled carbon nanotubes–ionic liquid and nanoporous Pd. RSC Adv 2014. [DOI: 10.1039/c4ra09791b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel electrochemical immunosensor using MWCNTs–BMIMPF6/NP-Pd as a sensor platform to sequentially immobilize antibodies was developed for hCG detection.
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Affiliation(s)
- Wenjuan Guo
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Yiming Liu
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Xue Meng
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Meishan Pei
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Jinping Wang Jinping Wang
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
| | - Luyan Wang
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022, China
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Ding X, Yang KL. Antibody-free Detection of Human Chorionic Gonadotropin by Use of Liquid Crystals. Anal Chem 2013; 85:10710-6. [DOI: 10.1021/ac400732n] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaokang Ding
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, Singapore 117585
| | - Kun-Lin Yang
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 4 Engineering
Drive 4, Singapore 117585
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Jain S, Chattopadhyay S, Jackeray R, Abid CKVZ, Singh H. Novel functionalized fluorescent polymeric nanoparticles for immobilization of biomolecules. NANOSCALE 2013; 5:6883-6892. [PMID: 23783838 DOI: 10.1039/c3nr34100c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Novel, size controlled fluorescent polymeric nanoparticles (FPNP) were synthesized having acetoacetoxy functionality on the surface for immobilization of biomolecules which can be utilized as biomarkers and labels in fluoroimmunoassays. Core-shell nanoparticles of poly(styrene, St-methyl methacrylate, MMA-acetoacetoxy ethyl methacrylate, AAEM), stabilized by various concentrations of surfactant, sodium lauryl sulphate (SLS), were obtained by facile miniemulsion co-polymerization encapsulated with pyrene molecules in their hydrophobic core. Analytical, spectroscopic and imaging characterization techniques revealed the formation of stable, monodisperse, spherical nano sized particles exhibiting high luminescence properties. Particles with 1% SLS (S1) showed good dispersion stability and fluorescence intensity and were chosen as ideal candidates for further immobilization studies. Steady state fluorescence studies showed 10 times higher fluorescence intensity of S1 nanoparticles than that of pyrene solution in solvent-toluene at the same concentration. Environmental factors such as pH, ionic strength and time were found to have no effect on fluorescence intensity of FPNPs. Surface β-di-ketone groups were utilized for the covalent immobilization of enzyme conjugated antibodies without any activation or pre-treatment of nanoparticles.
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Affiliation(s)
- Swati Jain
- Centre for Biomedical Engineering, Indian Institute of Technology-Delhi, New Delhi-16, India.
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Liu S, Tian J, Wang L, Zhang Y, Qin X, Luo Y, Asiri AM, Al-Youbi AO, Sun X. Hydrothermal treatment of grass: a low-cost, green route to nitrogen-doped, carbon-rich, photoluminescent polymer nanodots as an effective fluorescent sensing platform for label-free detection of Cu(II) ions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:2037-41. [PMID: 22419383 DOI: 10.1002/adma.201200164] [Citation(s) in RCA: 842] [Impact Index Per Article: 70.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 01/24/2012] [Indexed: 05/20/2023]
Abstract
Increasing reaction temperature produces photoluminescent polymer nanodots (PPNDs) with decreased particle size and increased quantum yield. Such PPNDs are used as an effective fluorescent sensing platform for label-free sensitive and selective detection of Cu(II) ions with a detection limit as low as 1 nM. This method is successfully applied to determine Cu(2+) in real water samples.
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Affiliation(s)
- Sen Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin, China
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Liang J, Wang Y, Liu B. Paper-based fluoroimmunoassay for rapid and sensitive detection of antigen. RSC Adv 2012. [DOI: 10.1039/c2ra20156a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Hlavacek A, Bouchal P, Skládal P. Biotinylation of quantum dots for application in fluoroimmunoassays with biotin-avidin amplification. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0729-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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