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Bilge S, Dogan-Topal B, Gürbüz MM, Ozkan SA, Sınağ A. Recent trends in core/shell nanoparticles: their enzyme-based electrochemical biosensor applications. Mikrochim Acta 2024; 191:240. [PMID: 38573400 PMCID: PMC10994877 DOI: 10.1007/s00604-024-06305-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/09/2024] [Indexed: 04/05/2024]
Abstract
Improving novel and efficient biosensors for determining organic/inorganic compounds is a challenge in analytical chemistry for clinical diagnosis and research in biomedical sciences. Electrochemical enzyme-based biosensors are one of the commercially successful groups of biosensors that make them highly appealing because of their low cost, high selectivity, and sensitivity. Core/shell nanoparticles have emerged as versatile platforms for developing enzyme-based electrochemical biosensors due to their unique physicochemical properties and tunable surface characteristics. This study provides a comprehensive review of recent trends and advancements in the utilization of core/shell nanoparticles for the development of enzyme-based electrochemical biosensors. Moreover, a statistical evaluation of the studies carried out in this field between 2007 and 2023 is made according to the preferred electrochemical techniques. The recent applications of core/shell nanoparticles in enzyme-based electrochemical biosensors were summarized to quantify environmental pollutants, food contaminants, and clinical biomarkers. Additionally, the review highlights recent innovations and strategies to improve the performance of enzyme-based electrochemical biosensors using core/shell nanoparticles. These include the integration of nanomaterials with specific functions such as hydrophilic character, chemical and thermal stability, conductivity, biocompatibility, and catalytic activity, as well as the development of new hybrid nanostructures and multifunctional nanocomposites.
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Affiliation(s)
- Selva Bilge
- Department of Chemistry, Ankara University, 06100, Besevler, Ankara, Turkey.
| | - Burcu Dogan-Topal
- Faculty of Pharmacy, Department of Analytical Chemistry, Ankara University, 06560, Ankara, Turkey
| | - Manolya Müjgan Gürbüz
- Faculty of Pharmacy, Department of Analytical Chemistry, Ankara University, 06560, Ankara, Turkey
| | - Sibel A Ozkan
- Faculty of Pharmacy, Department of Analytical Chemistry, Ankara University, 06560, Ankara, Turkey.
| | - Ali Sınağ
- Faculty of Engineering, Department of Food Engineering, Istanbul Aydın University, 34307, Kücükcekmece, Istanbul, Turkey
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2
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AgPdNFs and AuNOs@GO nanocomposites for T-2 toxin detection by catalytic hairpin assembly. Mikrochim Acta 2023; 190:120. [PMID: 36884101 DOI: 10.1007/s00604-023-05700-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 02/09/2023] [Indexed: 03/09/2023]
Abstract
T-2 toxin is the most potent and toxic mycotoxin, produced by various Fusarium species that can potentially affect human health, and widely exists in field crops and stored grain. In this work, an electrochemical aptasensor with nonenzymatic signal amplification strategy for the detection of T-2 toxin is presented, using noble metal nanocomposites and catalytic hairpin assembly as signal amplification strategy. Silver palladium nanoflowers and gold octahedron nanoparticles@graphene oxide nanocomposites are used for synergistic amplification of electrical signals. Simultaneously, the catalytic hairpin assembly strategy based on artificial molecular technology was introduced to further amplify the signal. Under optimal conditions, T-2 toxin was measured within a linear concentration range 1 × 10-2 ~ 1 × 104 pg·mL-1 with an extremely low detection limit of 6.71 fg·mL-1. The aptasensor exhibited high sensitivity, good selectivity, satisfactory stability, and excellent reproducibility. Moreover, this method had high accuracy in detecting T-2 toxin in beer sample. The encouraging results show the potential application in foodstuff analysis. A dual signal amplification electrochemical biosensor for the detection of T-2 toxins was constructed, through the signal amplification of noble metal nanomaterials and CHA strategy.
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3
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Al Fatease A, Yin J, Guo W, Umar A. Porous Carbon Nanospheres and Gold Nanocomposite-Based Electrochemical Aptasensor for the Detection of Streptomycin. J Biomed Nanotechnol 2022. [DOI: 10.1166/jbn.2022.3500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
A novel electrochemical aptasensor modified with the nanocomposite of porous carbon nanospheres and Au urchins as the signal amplification and immobility platforms for aptamer was successfully constructed for ultrasensitive and selective determination of streptomycin. The streptomycin
aptamer was fixed on the surface of the nanocomposite via the strong Au–S bond between Au urchins and aptamer. The target binding-induced conformational change of aptamer resulted in signal attenuation, which was expressed as “ΔI = IBSA − Istreptomycin.”
Based on the synergic signal amplification platform, the as-prepared aptamer-based sensor showed a wider linearity to streptomycin from 0.01 to 350 ng/mL with a low detection limit of 5.0 pg/mL under the optimized condition. Finally, the aptasensor was operated in milk and honey to detect
streptomycin. This study has provided a facile way to develop highly sensitive, effective and efficient aptamer-based electrochemical sensors for the detection of antibiotics at very low concentration.
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4
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Saeed AA, Abbas MN, El-Hawary WF, Issa YM, Singh B. A Core–Shell Au@TiO2 and Multi-Walled Carbon Nanotube-Based Sensor for the Electroanalytical Determination of H2O2 in Human Blood Serum and Saliva. BIOSENSORS 2022; 12:bios12100778. [PMID: 36290916 PMCID: PMC9599508 DOI: 10.3390/bios12100778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 11/25/2022]
Abstract
A hydrogen peroxide (H2O2) sensor was developed based on core–shell gold@titanium dioxide nanoparticles and multi-walled carbon nanotubes modified glassy carbon electrode (Au@TiO2/MWCNTs/GCE). Core–shell Au@TiO2 material was prepared and characterized using a scanning electron microscopy and energy dispersive X-ray analysis (SEM/EDX), transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman spectroscopy, X-ray diffraction (XRD) and Zeta-potential analyzer. The proposed sensor (Au@TiO2/MWCNTs/GCE) was investigated electrochemically using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The analytical performance of the sensor was evaluated towards H2O2 using differential pulse voltammetry (DPV). The proposed sensor exhibited excellent stability and sensitivity with a linear concentration range from 5 to 200 µM (R2 = 0.9973) and 200 to 6000 µM (R2 = 0.9994), and a limit of detection (LOD) of 1.4 µM achieved under physiological pH conditions. The practicality of the proposed sensor was further tested by measuring H2O2 in human serum and saliva samples. The observed response and recovery results demonstrate its potential for real-world H2O2 monitoring. Additionally, the proposed sensor and detection strategy can offer potential prospects in electrochemical sensors development, indicative oxidative stress monitoring, clinical diagnostics, general cancer biomarker measurements, paper bleaching, etc.
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Affiliation(s)
- Ayman Ali Saeed
- Applied Organic Chemistry Department, Chemical Industries Research Institute, National Research Centre (NRC), Dokki, Giza 12622, Egypt
| | - Mohammed Nooredeen Abbas
- Applied Organic Chemistry Department, Chemical Industries Research Institute, National Research Centre (NRC), Dokki, Giza 12622, Egypt
| | | | | | - Baljit Singh
- MiCRA Biodiagnostics Technology Gateway & Centre of Applied Science for Health, Technological University Dublin (TU Dublin), D24 FKT9 Dublin 24, Ireland
- Correspondence: ; Tel.: +353-12-207-863
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5
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Gu Y, Li Y, Ren D, Sun L, Zhuang Y, Yi L, Wang S. Recent advances in nanomaterial‐assisted electrochemical sensors for food safety analysis. FOOD FRONTIERS 2022. [DOI: 10.1002/fft2.143] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Ying Gu
- Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming China
| | - Yonghui Li
- Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming China
| | - Dabing Ren
- Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming China
| | - Liping Sun
- Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming China
| | - Yongliang Zhuang
- Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming China
| | - Lunzhao Yi
- Faculty of Food Science and Engineering Kunming University of Science and Technology Kunming China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health School of Medicine Nankai University Tianjin China
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6
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Hui Y, Peng H, Zhang F, Zhang L, Yufang L, Zhao A, Jia R, Wang B, Song Y. A novel electrochemical aptasensor based on layer-by-layer assembly of DNA-Au@Ag conjugates for rapid detection of aflatoxin M 1 in milk samples. J Dairy Sci 2021; 105:1966-1977. [PMID: 34955267 DOI: 10.3168/jds.2021-20931] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 11/12/2021] [Indexed: 01/10/2023]
Abstract
Aflatoxin M1 (AFM1) is a common toxin in dairy products that causes acute and chronic human health disorders. Thus, the development of a rapid and accurate AFM1 detection method is of vital importance for food safety monitoring. This work was to develop a novel electrochemical aptasensor for sensitive and specific determination of AFM1. The dendritic-like nanostructure was formed on the gold electrode surface by layer-by-layer assembly of gold-silver core-shell nanoparticles modified with DNA conjugates. In the presence of AFM1, the specific recognition between AFM1 and Apt caused the disassociation of the DNA controlled dual Au@Ag conjugates from the surface of the electrode, causing less methylene blue to bind to the surface and weakening the electrochemical signal. The more AFM1 there is, the weaker the electrochemical signal. Transmission electron microscope results showed that the successfully synthesized Au@Ag nanoparticles exhibited a core-shell structure with Au as core and Ag as shell, and their average diameter was about 30 nm. Under optimal conditions, the electrochemical aptasensor showed a wide detection ranging from 0.05 ng mL-1 to 200 ng mL-1, and a low detection limit of 0.02 ng mL-1. Moreover, the proposed strategy has been successfully applied to the detection of AFM1 in cow, goat, and sheep milk samples with satisfactory recoveries ranging from 91.10% to 104.05%. This work can provide a novel rapid detection method for AFM1, and also provide a new sensing platform for the detection of other toxins.
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Affiliation(s)
- Yuanyuan Hui
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Haishuai Peng
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Fuxin Zhang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Lei Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Liu Yufang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Aiqing Zhao
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Rong Jia
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Bini Wang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi 710119, China; Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an, Shaanxi 710069, China.
| | - Yuxuan Song
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China.
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7
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Hu M, Liang G, Chen K, Zhu L, Xu M, Wang M, Li J, He L, Zhang Z, Du M. Conjugated bimetallic cobalt/iron polyphthalocyanine as an electrochemical aptasensing platform for impedimetric determination of enrofloxacin in diverse environments. Mikrochim Acta 2021; 188:432. [PMID: 34822036 DOI: 10.1007/s00604-021-05086-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/31/2021] [Indexed: 12/13/2022]
Abstract
The synthesis of bimetallic cobalt/iron polyphthalocyanine (represented by polyCoFePc) network via a modified solid-phase synthesis method is described. It was exploited as a platform for anchoring enrofloxacin (ENR)-targeted aptamer strands, thus, fabricating a label-free impedimetric aptasensor for determination of ENR. The polyCoFePc exhibited a porous two-dimensional (2D) conjugated nanostructure and rich functional groups, and showed a superior binding interaction toward aptamer strands as compared to monometallic polyFePc and polyCoPc networks. This finding was attributed to structural defects and increased active binding sites, thereby giving a highly sensitive detection ability toward ENR. By using electrochemical impedance spectroscopy (EIS), the polyCoFePc-based electrochemical aptasensor exhibited an extremely low detection limit of 0.06 fg mL-1 within the ENR concentration from 0.1 fg mL-1 to 100 pg mL-1, along with high selectivity, good reproducibility, and remarkable stability. Interestingly, the constructed polyCoFePc-based aptasensor also demonstrated wide practicability in various environments. The recoveries of ENR spiked into river water, milk, and pork samples ranged within 91.2 - 107.2%, 90.5 - 109.6%, and 91.2 - 102.3%, respectively.
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Affiliation(s)
- Min Hu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Gaolei Liang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Kun Chen
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Lei Zhu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Miaoran Xu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Minghua Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Junguang Li
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Linghao He
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Zhihong Zhang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China.
| | - Miao Du
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China.
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8
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Rahmati Z, Roushani M, Hosseini H, Choobin H. Electrochemical immunosensor with Cu 2O nanocube coating for detection of SARS-CoV-2 spike protein. Mikrochim Acta 2021; 188:105. [PMID: 33651173 PMCID: PMC7921825 DOI: 10.1007/s00604-021-04762-9] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/16/2021] [Indexed: 01/08/2023]
Abstract
Severe acute respiratory syndrome SARS-CoV-2 has caused a global pandemic starting in 2020. Accordingly, testing is crucial for mitigating the economic and public health effects. In order to facilitate point-of-care diagnosis, this study aims at presenting a label-free electrochemical biosensor as a powerful nanobiodevice for SARS-CoV-2 spike protein detection. Utilizing the IgG anti-SARS-CoV-2 spike antibody onto the electrode surface as a specific platform in an ordered orientation through staphylococcal protein A (ProtA) is highly significant in fabricating the designed nanobiodevice. In this sense, the screen-printed carbon electrode modified with Cu2O nanocubes (Cu2O NCs), which provide a large surface area in a very small space, was applied in order to increase the ProtA loading on the electrode surface. Accordingly, the sensitivity and stability of the sensing platform significantly increased. The electrochemical evaluations proved that there is a very good linear relationship between the charge transfer resistance (Rct) and spike protein contents via a specific binding reaction in the range 0.25 fg mL-1 to 1 μg mL-1. Moreover, the assay when tested with influenza viruses 1 and 2 was performed in 20 min with a low detection limit of 0.04 fg mL-1 for spike protein without any cross-reactivity. The designed nanobiodevice exhibited an average satisfactory recovery rate of ~ 97-103% in different artificial sample matrices, i.e., saliva, artificial nasal, and universal transport medium (UTM), illustrating its high detection performance and practicability. The nanobiodevice was also tested using real patients and healthy samples, where the results had been already obtained using the standard polymerase chain reaction (PCR) procedure, and showed satisfactory results. Graphical abstract.
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Affiliation(s)
- Zeinab Rahmati
- Department of Chemistry, Faculty of Sciences, Ilam University, P. O. BOX. 69315-516, Ilam, Iran
| | - Mahmoud Roushani
- Department of Chemistry, Faculty of Sciences, Ilam University, P. O. BOX. 69315-516, Ilam, Iran.
| | - Hadi Hosseini
- Department of Chemistry, Faculty of Sciences, Ilam University, P. O. BOX. 69315-516, Ilam, Iran
| | - Hamzeh Choobin
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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9
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Jamei HR, Rezaei B, Ensafi AA. Ultra-sensitive and selective electrochemical biosensor with aptamer recognition surface based on polymer quantum dots and C 60/MWCNTs- polyethylenimine nanocomposites for analysis of thrombin protein. Bioelectrochemistry 2020; 138:107701. [PMID: 33254052 DOI: 10.1016/j.bioelechem.2020.107701] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 10/22/2022]
Abstract
In this study, an ultra-sensitive and selective Thrombin biosensor with aptamer-recognition surface is introduced based on carbon nanocomposite. To prepare the this biosensor, screen-printed carbon electrodes (SPCE) were modified with a nanocomposite made from fullerene (C60), multi-walled carbon nanotubes (MWCNTs), polyethylenimine (PEI) and polymer quantum dots (PQdot). The unique characteristics of each component of the C60/MWCNTs-PEI/PQdot nanocomposite allow for synergy between nanoparticles while polymer quantum dots resulted in characteristics such as high stability, high surface to volume ratio, high electrical conductivity, high biocompatibility, and high mechanical and chemical stability. The large number of amine groups in C60/MWCNTs-PEI/PQdot nanocomposite created more sites for better covalent immobilization of amino-linked aptamer (APT) which improved the sensitivity and stability of the aptasensor. Differential Pulse Voltammetry (DPV) method with probe solution was used as the measurment method. Binding of thrombin protein to aptamers immobilized on the transducer resulted in reduced electron transfer at the electrode/electrolyte interface which reduces the peak current (IP) in DPV. The calibration curve was drawn using the changes in the peak current (ΔIP),. The proposed aptasensor has a very low detection limit of 6 fmol L-1, and a large linear range of 50 fmol L-1 to 20 nmol L-1. Furthermore, the proposed C60/MWCNTs-PEI/PQdot/APT aptasensor has good reproducibility, great selectivity, low response time and a good stability during its storage. Finally, the application of the proposed aptasensor for measuring thrombin on human blood serum samples was investigated. This aptasensor can be useful in bioengineering and biomedicine applications as well as for clinical studies.
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Affiliation(s)
- Hamid Reza Jamei
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Behzad Rezaei
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Ali Asghar Ensafi
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Abstract
Nano-electrochemical cytosensors have attracted intensive attention and achieved huge progress in the biomedical field owing to their stability, rapidity, accuracy, and low-cost properties.
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Affiliation(s)
- Jie Xu
- School of Information and Communication Engineering
- University of Electronic Science and Technology of China
- China
| | - Yanxiang Hu
- School of Information and Communication Engineering
- University of Electronic Science and Technology of China
- China
| | - Shengnan Wang
- School of Material Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- China
| | - Xing Ma
- School of Material Science and Engineering
- Harbin Institute of Technology (Shenzhen)
- China
| | - Jinhong Guo
- School of Information and Communication Engineering
- University of Electronic Science and Technology of China
- China
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Zhang Q, Fan G, Chen W, Liu Q, Zhang X, Zhang X, Liu Q. Electrochemical sandwich-type thrombin aptasensor based on dual signal amplification strategy of silver nanowires and hollow Au-CeO 2. Biosens Bioelectron 2019; 150:111846. [PMID: 31740255 DOI: 10.1016/j.bios.2019.111846] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 10/31/2019] [Accepted: 11/01/2019] [Indexed: 01/01/2023]
Abstract
Signal amplification is crucial in electrochemical biosensor to obtain low detection limits. In this work, a highly sensitive sandwich-type thrombin aptasensor is constructed, based on dual signal amplification of uniform silver nanowires (AgNWs) and hollow Au-CeO2 nanocomposites. AgNWs are decorated on the ITO surface to immobilize amino functionalized thrombin capture apemeter 1 (Apt1). And Au nanoparticles (AuNPs) grown directly on the surface of hollow CeO2 microstructure are used to immobilize sulfydryl functionalized thrombin reporter apemeter 2 (Apt2). Thus, sandwich-type apatasensor has been successfully designed, due to the specific recognition between thrombin and the two kinds of aptamers. One of the signal amplifications is from the good conductivity of uniform AgNWs. Moreover, uniform AgNWs together with hollow Au-CeO2 exhibit the good catalytic performance for the reduction of H2O2, further resulting in significant electrochemical signal amplification. Because the electrochemical signal amplification is closely related to the thrombin concentration, differential pulse voltammetry is used to specifically detect thrombin. Under the optimized conditions, the proposed method has a good linear response ranged from 0.5 pM to 30 nM with a low detection limit of 0.25 pM (S/N = 3) for thrombin. The proposed thrombin aptasensor displays good selectivity, reproducibility and stability, providing a good platform for the ultrasensitive detection of thrombin.
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Affiliation(s)
- Qiaoxia Zhang
- College of Chemical and Environmental Engineering, State Key Laboratory of Mining Disaster Prevention and Control Co-founded By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Gaochao Fan
- College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Wei Chen
- College of Chemical and Environmental Engineering, State Key Laboratory of Mining Disaster Prevention and Control Co-founded By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Qing Liu
- College of Chemical and Environmental Engineering, State Key Laboratory of Mining Disaster Prevention and Control Co-founded By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Xiao Zhang
- College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Xianxi Zhang
- Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage & Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China
| | - Qingyun Liu
- College of Chemical and Environmental Engineering, State Key Laboratory of Mining Disaster Prevention and Control Co-founded By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
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12
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Han Y, Zhang R, Dong C, Cheng F, Guo Y. Sensitive electrochemical sensor for nitrite ions based on rose-like AuNPs/MoS2/graphene composite. Biosens Bioelectron 2019; 142:111529. [DOI: 10.1016/j.bios.2019.111529] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 07/20/2019] [Indexed: 12/19/2022]
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13
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Si X, Tang S, Wang K, Zhou G, Xia J, Zhao Y, Zhao H, Shen Q, Liu Z. Electrochemical amplification for Hg(II) quantification by anchoring an enzymatically extended aptamer. ANAL LETT 2019. [DOI: 10.1080/00032719.2019.1626415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiaoxi Si
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Shiyun Tang
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Kunmiao Wang
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Guofu Zhou
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Jianjun Xia
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Yang Zhao
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Hui Zhao
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Qinpeng Shen
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
| | - Zhihua Liu
- Yunnan Key Laboratory of Tobacco Chemistry, Research and Development of Center, China Tobacco Yunnan Industrial Company, Kunming, China
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14
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Kalambate PK, Dhanjai, Huang Z, Li Y, Shen Y, Xie M, Huang Y, Srivastava AK. Core@shell nanomaterials based sensing devices: A review. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.04.002] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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15
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Covalent organic framework-based electrochemical aptasensors for the ultrasensitive detection of antibiotics. Biosens Bioelectron 2019; 132:8-16. [PMID: 30851495 DOI: 10.1016/j.bios.2019.02.040] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/08/2019] [Accepted: 02/13/2019] [Indexed: 01/10/2023]
Abstract
We designed and synthesized a novel covalent organic framework (COF) by condensation polymerization of 1,3,6,8-tetrakis(4-formylphenyl)pyrene and melamine through imine bonds (represented by Py-M-COF). The basic characterizations revealed that the Py-M-COF not only exhibited an extended π-conjugation framework, a large specific surface area (495.5 m2 g-1), big pore cavities, and nanosheet-like structure but also possessed rich functional groups, such as C˭C, C˭N, C˭O, and NH2. These features endowed the Py-M-COF with high charge carrier mobility, further improving the strong immobilization of DNA aptamer strands via π-π stacking interaction and electrostatic interaction. As such, the Py-M-COF-based electrochemical aptasensors are ultrasensitive in detecting different antibiotics, including enrofloxacin (ENR) and ampicillin (AMP), yielding extremely low detection limits of 6.07 and 0.04 fg mL-1 (S/N = 3) toward ENR and AMP, respectively, along with other excellent sensing performances. This biosensing platform based on Py-M-COF has potential applications for the sensitive detection of antibiotics or other analytes by replacing the corresponding aptamers.
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16
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Li X, Li J, Zhu C, Zhang X, Chen J. A new electrochemical immunoassay for prion protein based on hybridization chain reaction with hemin/G-quadruplex DNAzyme. Talanta 2018; 182:292-298. [PMID: 29501155 DOI: 10.1016/j.talanta.2018.01.089] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/22/2018] [Accepted: 01/30/2018] [Indexed: 11/29/2022]
Abstract
In this work, a new electrochemical immunosensor was developed for prion protein assay based on hybridization chain reaction (HCR) with hemin/G-quadruplex DNAzyme for signal amplification. In this amplification system, the hemin/G-quadruplex DNAzyme simultaneously mimicked the biocatalytic functions for H2O2 reduction and L-cysteine oxidation. In the presence of L-cysteine, the hemin/G-quadruplex catalyzed the oxidation of L-cysteine to L-cystine. At the same time, H2O2 was produced under the oxygen condition. Then, the hemin/G-quadruplex could quickly catalyze the reduction of H2O2, mimicking the catalytic performance of horseradish peroxidase (HRP). Under the optimal conditions, the immunosensor showed a wide linear response range from 0.5 pg/mL to 100 ng/mL with the low detection limit of 0.38 pg/mL (3σ). By changing the specific antibody, this strategy could be easily extended to detect the infectious isoform of prion (PrPSc) and other proteins. Based on its good analytical performance, the developed method shows great potential applications in diagnosis of prion diseases at presymptomatic stage and bioanalysis.
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Affiliation(s)
- Xiaoyu Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Junjing Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Caixia Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Xiaohua Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Jinhua Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
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17
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Li J, Yan X, Li X, Zhang X, Chen J. A new electrochemical immunosensor for sensitive detection of prion based on Prussian blue analogue. Talanta 2017; 179:726-733. [PMID: 29310300 DOI: 10.1016/j.talanta.2017.12.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/27/2017] [Accepted: 12/02/2017] [Indexed: 11/28/2022]
Abstract
Based on Co-Co Prussian blue analogue (Co-Co PBA), a novel immunosensor has been developed for sensitive detection of prion protein (PrPC). Gold nanoparticles (AuNPs)-modified Co-Co PBA nanocubes (PBA-AuNPs) worked as a support of the antibody (Ab2) of PrPC to obtain Ab2-PBA-AuNPs composite and also as the signal source for PrPC assay. When PrPC existed, Ab2-PBA-AuNPs could be introduced to the surface of another antibody of PrPC (Ab1) modified AuNPs/GC electrode (the gold nanoparticles-modified glassy carbon electrode) through specific antigen-antibody interaction between PrPC and its antibodies to form the Ab1-PrPC-Ab2 sandwich structure. With the help of KOH aqueous solution, PBA generated a large DPV response. The response peak currents were linear with the logarithmic values of the concentration of PrPC in the range from 0.075pgmL-1 to 100pgmL-1 with the detection limit of 0.014pgmL-1. Also, the immunosensor showed good selectivity and reproducibility. Based on the simple sensing structure and good analytical performance, the developed immunosensor may have promising applications in practical assay of infectious isoform of prion (PrPSc) and other proteins by simply changing the related antibody.
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Affiliation(s)
- Junjing Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Xiaoxia Yan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Xiaoyu Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Xiaohua Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
| | - Jinhua Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
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18
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Yang X, Lv J, Yang Z, Yuan R, Chai Y. A Sensitive Electrochemical Aptasensor for Thrombin Detection Based on Electroactive Co-Based Metal-Organic Frameworks with Target-Triggering NESA Strategy. Anal Chem 2017; 89:11636-11640. [PMID: 29019234 DOI: 10.1021/acs.analchem.7b03056] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this work, an improved target-triggering nicking enzyme signaling amplification (NESA) strategy as signal enhancer has been fabricated to obtain a sensitive electrochemical thrombin (TB) biosensor combined with PtPd NPs decorated electroactive Co-based metal-organic frameworks (Co-MOFs/PtPdNPs) as a redox mediator. Traditionally, in the NESA strategy, only one of the output double strands DNA is available in the next cycle. However, in this work, all of the output DNA involved in the improved NESA strategies could be further employed, resulting in high utilization of output DNA, which further enhanced signal amplification and sensitivity of the biosensor. In addition, the electroactive Co-MOFs were not only used as nanocarriers but also acted as signal labels, avoiding adding extra redox media. Simultaneously, in the presence of H2O2, PtPd NPs decorated on the Co-MOFs act the same as horseradish peroxidase to promote the oxidation of H2O2, further promoting the conversion of Co2+ to Co3+, leading to electrochemical signal amplification. With such design, the TB biosensor exhibited good sensitivity from 1 pM to 30 nM with a detection limit of 0.32 pM. This new NESA strategy with high utilization of output DNA can supply one efficient approach to improve signal amplification, which also open an avenue for sensitivity enhancement in detection of analytes.
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Affiliation(s)
- Xia Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, P. R. China
| | - Jiajia Lv
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, P. R. China
| | - Zhehan Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, P. R. China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, P. R. China
| | - Yaqin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University , Chongqing 400715, P. R. China
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19
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Han G, Li X, Li J, Wang X, Zhang YS, Sun R. Special Magnetic Catalyst with Lignin-Reduced Au-Pd Nanoalloy. ACS OMEGA 2017; 2:4938-4945. [PMID: 31457772 PMCID: PMC6641716 DOI: 10.1021/acsomega.7b00830] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 08/10/2017] [Indexed: 05/21/2023]
Abstract
This study describes a new strategy to fabricate a special magnetic catalyst via facile coating Au-Pd nanoalloy catalysts onto a commercial magnetic stirring bar, without the incorporation of iron element. First, the abundant natural "waste" lignin was utilized as the reducing and stabilizing agent to prepare Au-Pd nanoalloys in a green manner. The Au-Pd nanoalloys were assumed to have a core-shell structure with an Au-rich core and a Pd-rich shell. The Au-Pd nanoalloys could be well dispersed in aqueous medium due to the stabilizing effect of lignin and be conveniently coated onto the surface of a commercial stirring bar. The Au1.0Pd1.0 nanoalloy catalyst exhibited excellent catalytic activities in the reduction of 4-nitrophenol to 4-amnophenol by NaBH4, with a rate constant (k) of 0.239 min-1, which was higher than that of Au0.5Pd1.0 and Au2.0Pd1.0 nanoalloys and 4 times higher than that of a single-component Au or Pd nanoparticles. Besides, the catalytic ability of Au-Pd nanoalloy catalyst could be maintained even after seven cycles of catalysis. The catalytic rate constant was found to be positively correlated to the stirring speed of the bar. The scanning electron microscopy analysis revealed ravines and pores on the surface of lignin-nanoalloys composites, implying the possible mechanism of the catalytic activities. This study not only proved the feasibility of lignin for green synthesis of Au-Pd nanoalloys but also proposed a facile and innovated strategy for the future production of solid/liquid catalytic platforms where the developed method could be used to coat any surface interfacing the reagents.
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Affiliation(s)
- Guocheng Han
- State
Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiaoyun Li
- State
Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
- Division
of Biomedical Engineering, Department of Medicine, Brigham and Women’s
Hospital, Harvard Medical School, Boston 02139, United States
| | - Jiaming Li
- State
Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiaoying Wang
- State
Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
- Division
of Biomedical Engineering, Department of Medicine, Brigham and Women’s
Hospital, Harvard Medical School, Boston 02139, United States
- E-mail: (X.W.)
| | - Yu Shrike Zhang
- Division
of Biomedical Engineering, Department of Medicine, Brigham and Women’s
Hospital, Harvard Medical School, Boston 02139, United States
- E-mail: Zhang (Y.S.Z.)
| | - Runcang Sun
- State
Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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20
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Chen S, Liu P, Su K, Li X, Qin Z, Xu W, Chen J, Li C, Qiu J. Electrochemical aptasensor for thrombin using co-catalysis of hemin/G-quadruplex DNAzyme and octahedral Cu 2O-Au nanocomposites for signal amplification. Biosens Bioelectron 2017; 99:338-345. [PMID: 28800505 DOI: 10.1016/j.bios.2017.08.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/02/2017] [Accepted: 08/03/2017] [Indexed: 01/09/2023]
Abstract
In this work, novel octahedral Cu2O-Au nanocomposites were synthesized and first applied in an electrochemical aptasensor to detect thrombin (TB) with the aid of a DNAzyme for signal amplification. The octahedral Cu2O-Au nanocomposites have not only simultaneously served as signal amplifying molecules but have also been utilized as an ideal loading platform to immobilize a large number of electroactive substances and recognition probes. Gold nanoparticles (AuNPs) were grown directly on the surface of the octahedral Cu2O nanocrystals, and the Cu2O-Au nanocomposites obtained had the advantages of large surface areas and excellent biocompatibilities. The hemin/G-quadruplex, which was formed by intercalating hemin into the amino terminated thrombin binding aptamer (NH2-TBA), and the electroactive toluidine blue (Tb) were immobilized onto the Cu2O-Au nanocomposite surfaces through a stable Au-N bond. AuNPs, Cu2O and hemin/G-quadruplex co-catalyse the H2O2 in the working buffer to promote the electron transfer of Tb as a multiple signal amplification strategy in order to improve the performance of the electrochemical aptasensor. Under optimal conditions, the designed aptasensor exhibited sensitive detection of TB from 100 fM to 20nM with a lower detection limit of 23fM. This proposed aptasensor exhibited good sensitivity, high specificity and acceptable reproducibility and could be widely applied in bioassay analysis.
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Affiliation(s)
- Shuai Chen
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Pin Liu
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Kewen Su
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Xuan Li
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Zhen Qin
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Wei Xu
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Jun Chen
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Chaorui Li
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China.
| | - Jingfu Qiu
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China.
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21
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A label-free electrochemical biosensor for methyltransferase activity detection and inhibitor screening based on graphene quantum dot and enzyme-catalyzed reaction. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.06.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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22
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Huang Q, Lin X, Zhu JJ, Tong QX. Pd-Au@carbon dots nanocomposite: Facile synthesis and application as an ultrasensitive electrochemical biosensor for determination of colitoxin DNA in human serum. Biosens Bioelectron 2017; 94:507-512. [DOI: 10.1016/j.bios.2017.03.048] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 03/02/2017] [Accepted: 03/21/2017] [Indexed: 12/18/2022]
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23
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Wang X, Sun D, Tong Y, Zhong Y, Chen Z. A voltammetric aptamer-based thrombin biosensor exploiting signal amplification via synergetic catalysis by DNAzyme and enzyme decorated AuPd nanoparticles on a poly(o-phenylenediamine) support. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2160-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Sensitive electrochemical assay of alkaline phosphatase activity based on TdT-mediated hemin/G-quadruplex DNAzyme nanowires for signal amplification. Biosens Bioelectron 2017; 87:970-975. [DOI: 10.1016/j.bios.2016.09.069] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/30/2016] [Accepted: 09/19/2016] [Indexed: 01/18/2023]
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25
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Zhao J, Zheng T, Gao J, Guo S, Zhou X, Xu W. A sub-picomolar assay for protein by using cubic Cu2O nanocages loaded with Au nanoparticles as robust redox probes and efficient non-enzymatic electrocatalysts. Analyst 2017; 142:794-799. [DOI: 10.1039/c6an02599d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a simple and sensitive electrochemical aptasensor for protein (thrombin – TB used as the model) was developed by using cubic Cu2O nanocages (Cu2O-NCs) loaded with Au nanoparticles (AuNPs@Cu2O-NCs) as non-enzymatic electrocatalysts and robust redox probes.
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Affiliation(s)
- Jianmin Zhao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
| | - Ting Zheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
| | - Jiaxi Gao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
| | - Shijing Guo
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
| | - Xingxing Zhou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
| | - Wenju Xu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing
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26
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Shao K, Wang B, Ye S, Zuo Y, Wu L, Li Q, Lu Z, Tan X, Han H. Signal-Amplified Near-Infrared Ratiometric Electrochemiluminescence Aptasensor Based on Multiple Quenching and Enhancement Effect of Graphene/Gold Nanorods/G-Quadruplex. Anal Chem 2016; 88:8179-87. [DOI: 10.1021/acs.analchem.6b01935] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Kang Shao
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Biru Wang
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Shiyi Ye
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Yunpeng Zuo
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Long Wu
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Qin Li
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Zhicheng Lu
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - XueCai Tan
- School
of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530008, People’s Republic of China
| | - Heyou Han
- State Key Laboratory
of Agricultural Microbiology, College of Science, College
of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
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27
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Wang H, Rong Q, Ma Z. Polyhydroquinone-graphene composite as new redox species for sensitive electrochemical detection of cytokeratins antigen 21-1. Sci Rep 2016; 6:30623. [PMID: 27464571 PMCID: PMC4964632 DOI: 10.1038/srep30623] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 07/06/2016] [Indexed: 02/02/2023] Open
Abstract
Polyhydroquinone-graphene composite as a new redox species was synthesized simply by a microwave-assisted one-pot method through oxidative polymerization of hydroquinone by graphene oxide, which exhibited excellent electrochemical redox activity at 0.124 V and can remarkably promote electron transfer. The as-prepared composite was used as immunosensing substrate in a label-free electrochemical immunosensor for the detection of cytokeratins antigen 21-1, a kind of biomarker of lung cancer. The proposed immunosensor showed wide liner range from 10 pg mL(-1) to 200 ng mL(-1) with a detection limit 2.3 pg mL(-1), and displayed a good stability and selectivity. In addition, this method has been used for the analysis of human serum sample, and the detection results showed good consistence with those of ELISA. The present substrate can be easily extended to other polymer-based nanocomposites.
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Affiliation(s)
- Huiqiang Wang
- Department of Chemistry, Capital Normal University, Beijing, 100048, China
| | - Qinfeng Rong
- Department of Chemistry, Capital Normal University, Beijing, 100048, China
| | - Zhanfang Ma
- Department of Chemistry, Capital Normal University, Beijing, 100048, China
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28
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Wang Q, Gan X, Zang R, Chai Y, Yuan Y, Yuan R. An amplified electrochemical proximity immunoassay for the total protein of Nosema bombycis based on the catalytic activity of Fe3O4NPs towards methylene blue. Biosens Bioelectron 2016; 81:382-387. [DOI: 10.1016/j.bios.2016.02.063] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 02/18/2016] [Accepted: 02/23/2016] [Indexed: 10/22/2022]
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29
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Gao F, Du L, Zhang Y, Zhou F, Tang D. A sensitive sandwich-type electrochemical aptasensor for thrombin detection based on platinum nanoparticles decorated carbon nanocages as signal labels. Biosens Bioelectron 2016; 86:185-193. [PMID: 27376191 DOI: 10.1016/j.bios.2016.06.055] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/17/2016] [Accepted: 06/18/2016] [Indexed: 10/21/2022]
Abstract
In this work, a novel and sensitive sandwich-type electrochemical aptasensor has been developed for thrombin detection based on platinum nanoparticles (Pt NPs) decorated carbon nanocages (CNCs) as signal tags. The morphological and compositional of the Pt NPs/CNCs were examined using transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. The results showed that the Pt NPs with about 3-5nm in diameter were well dispersed on the surface of CNCs. The thiolated aptamer was firstly immobilized on the gold electrode to capture the thrombin molecules, and then aptamer functionalized Pt NPs/CNCs nanocomposites were used to fabricate a sandwich sensing platform. Then, the high-content Pt NPs on carbon nanocages acting as hydrogen peroxide-mimicking enzyme catalyzed the reduction of H2O2, resulting in significant electrochemical signal amplification. Differential pulse voltammetry is employed to detect thrombin with different concentrations. Under optimized conditions, the approach provided a good linear response range from 0.05 pM to 20nM with a low detection limit of 10fM. This Pt NPs/CNCs-based aptasensor shows good precision, acceptable stability and reproducibility, which provided a promising strategy for electrochemical aptamer-based detection of other biomolecules.
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Affiliation(s)
- Fenglei Gao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 221004 Xuzhou, China.
| | - Lili Du
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 221004 Xuzhou, China
| | - Yu Zhang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 221004 Xuzhou, China
| | - Fuyi Zhou
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 221004 Xuzhou, China
| | - Daoquan Tang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 221004 Xuzhou, China.
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30
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Label-free electrochemical immunosensor based on enhanced signal amplification between Au@Pd and CoFe2O4/graphene nanohybrid. Sci Rep 2016; 6:23391. [PMID: 26987503 PMCID: PMC4796816 DOI: 10.1038/srep23391] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 03/03/2016] [Indexed: 12/26/2022] Open
Abstract
The improvement of sensitivity of electrochemical immunosensor can be achieved via two approaches: increasing loading capacities of antibody and enlarging responding electrochemical signals. Based on these, CoFe2O4/graphene nanohybrid (CoFe2O4/rGO) as support was firstly used for preparing electrochemical biosensor, and with the addition of Au@Pd nanorods (NRs) as mimic enzyme, a label-free electrochemical immunosensor was prepared. Due to the high electrical conductivity, open porous structure and large loading capacities of CoFe2O4/rGO, the enhanced signal amplification between Au@Pd NRs and CoFe2O4/rGO was studied. Fabricated as a novel substrate, the prepared immunosensor had a good analytical performance and exhibited a wide linear range from 0.01 to 18.0 ng · mL(-1) with a low detection limit of 3.3 pg · mL(-1) for estradiol, which was succeeded in applying to detect estradiol in the natural water.
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31
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Abstract
Nucleic acid aptamers are promising alternatives to antibodies in analytics. They are generally obtained through an iterative SELEX protocol that enriches a population of synthetic oligonucleotides to a subset that can recognize the chosen target molecule specifically and avidly. A wide range of targets is recognized by aptamers. Once identified and optimized for performance, aptamers can be reproducibly synthesized and offer other key features, like small size, low cost, sensitivity, specificity, rapid response, stability, and reusability. This makes them excellent options for sensory units in a variety of analytical platforms including those with electrochemical, optical, and mass sensitive transduction detection. Many novel sensing strategies have been developed by rational design to take advantage of the tendency of aptamers to undergo conformational changes upon target/analyte binding and employing the principles of base complementarity that can drive the nucleic acid structure. Despite their many advantages over antibodies, surprisingly few aptamers have yet been integrated into commercially available analytical devices. In this review, we discuss how to select and engineer aptamers for their identified application(s), some of the challenges faced in developing aptamers for analytics and many examples of their reported successful performance as sensors in a variety of analytical platforms.
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Affiliation(s)
- Muslum Ilgu
- Roy J Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames IA 50011, USA. and Aptalogic Inc., Ames IA 50014, USA
| | - Marit Nilsen-Hamilton
- Roy J Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames IA 50011, USA. and Aptalogic Inc., Ames IA 50014, USA and Ames Laboratory, US DOE, Ames IA 50011, USA
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32
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Wang Y, Zhang Y, Yan T, Fan D, Du B, Ma H, Wei Q. Ultrasensitive electrochemical aptasensor for the detection of thrombin based on dual signal amplification strategy of Au@GS and DNA-CoPd NPs conjugates. Biosens Bioelectron 2016; 80:640-646. [PMID: 26908183 DOI: 10.1016/j.bios.2016.02.042] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 02/15/2016] [Indexed: 10/22/2022]
Abstract
In this work, an ultrasensitive electrochemical aptasensor for the detection of thrombin was developed based on Au nanoparticles decorated graphene sheet (Au@GS) and CoPd binary nanoparticles (CoPd NPs). A sulfydryl-labeled thrombin capture probe (Apt1) and a biotin-labeled thrombin reporter probe (Apt2) were designed to achieve a sandwich-type strategy. Au@GS was used as a sensing platform for the facile immobilization of Apt1 through Au-S bond, forming a sensing interface for thrombin. The specific recognition of thrombin induced the attachment of Apt2-CoPd NPs to the electrode. The labeled CoPd NPs showed good catalytic properties toward the reduction of H2O2, resulting in an amperometric signal. The amperometric response was correlated to the thrombin concentration in sample solutions. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) confirmed the successful fabrication of the aptasensor. A linear response to thrombin in the range of 0.01-2.00 ng mL(-1) with a low detection limit (5 pg mL(-1)) was achieved. The proposed aptasensor showed good selectivity, good reproducibility and acceptable stability. This proposed strategy may find many potential applications in the detection of other biomolecules.
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Affiliation(s)
- Yaoguang Wang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yong Zhang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Tao Yan
- School of Resources and Environment, University of Jinan, Jinan 250022, China
| | - Dawei Fan
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Bin Du
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China; School of Resources and Environment, University of Jinan, Jinan 250022, China
| | - Hongmin Ma
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
| | - Qin Wei
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
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33
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Chen LX, Jiang LY, Wang AJ, Chen QY, Feng JJ. Simple synthesis of bimetallic AuPd dendritic alloyed nanocrystals with enhanced electrocatalytic performance for hydrazine oxidation reaction. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.151] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Xia Q, Fu S, Ren G, Chai F, Jiang J, Qu F. Fabrication of magnetic bimetallic Fe3O4@Au–Pd hybrid nanoparticles with recyclable and efficient catalytic properties. RSC Adv 2016. [DOI: 10.1039/c6ra08602k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
View of the preparation process and evaluation of the catalytic activity of Fe3O4@Pd and Fe3O4@Au–Pd NPs.
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Affiliation(s)
- Qingdong Xia
- Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis
- Colleges of Heilongjiang Province
- College of Chemistry and Chemical Engineering
- Harbin Normal University
- P. R. China
| | - Shanshan Fu
- Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis
- Colleges of Heilongjiang Province
- College of Chemistry and Chemical Engineering
- Harbin Normal University
- P. R. China
| | - Guojuan Ren
- Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis
- Colleges of Heilongjiang Province
- College of Chemistry and Chemical Engineering
- Harbin Normal University
- P. R. China
| | - Fang Chai
- Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis
- Colleges of Heilongjiang Province
- College of Chemistry and Chemical Engineering
- Harbin Normal University
- P. R. China
| | - Jingjie Jiang
- Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis
- Colleges of Heilongjiang Province
- College of Chemistry and Chemical Engineering
- Harbin Normal University
- P. R. China
| | - Fengyu Qu
- Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis
- Colleges of Heilongjiang Province
- College of Chemistry and Chemical Engineering
- Harbin Normal University
- P. R. China
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35
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Wang L, Feng F, Ma Z. Novel electrochemical redox-active species: one-step synthesis of polyaniline derivative-Au/Pd and its application for multiplexed immunoassay. Sci Rep 2015; 5:16855. [PMID: 26577799 PMCID: PMC4649611 DOI: 10.1038/srep16855] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/21/2015] [Indexed: 01/08/2023] Open
Abstract
Electrochemical redox-active species play crucial role in electrochemically multiplexed immunoassays. A one-pot method for synthesizing four kinds of new electrochemical redox-active species was reported using HAuCl4 and Na2PdCl4 as dual oxidating agents and aniline derivatives as monomers. The synthesized polyaniline derivative-Au/Pd composites, namely poly(N-methyl-o-benzenediamine)-Au/Pd, poly(N-phenyl-o-phenylenediamine)-Au/Pd, poly(N-phenyl-p-phenylenediamine)-Au/Pd and poly(3,3',5,5'-tetramethylbenzidine)-Au/Pd, exhibited electrochemical redox activity at -0.65 V, -0.3 V, 0.12 V, and 0.5 V, respectively. Meanwhile, these composites showed high H2O2 electrocatalytic activity because of the presence of Au/Pd. The as-prepared composites were used as electrochemical immunoprobes in simultaneous detection of four tumor biomarkers (carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA199), carbohydrate antigen 72-4 (CA724), and alpha fetoprotein (AFP)). This immunoassay shed light on potential applications in simultaneous gastric cancer (related biomarkers: CEA, CA199, CA724) and liver cancer diagnosis (related biomarkers: CEA, CA199, AFP). The present strategy to the synthesize redox species could be easily extended to other polymers such as polypyrrole derivatives and polythiophene derivatives. This would be of great significance in the electrochemical detection of more analytes.
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Affiliation(s)
- Liyuan Wang
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Feng Feng
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Zhanfang Ma
- Department of Chemistry, Capital Normal University, Beijing 100048, China
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36
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Wang H, Li G, Zhang Y, Zhu M, Ma H, Du B, Wei Q, Wan Y. Nanobody-Based Electrochemical Immunoassay for Ultrasensitive Determination of Apolipoprotein-A1 Using Silver Nanoparticles Loaded Nanohydroxyapatite as Label. Anal Chem 2015; 87:11209-14. [DOI: 10.1021/acs.analchem.5b04063] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Huan Wang
- Key Laboratory of Chemical Sensing and
Analysis in Universities of Shandong, School of Chemistry and Chemical
Engineering, University of Jinan, Jinan, Shandong 250022, P.R. China
| | - Guanghui Li
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia
Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
| | - Yihe Zhang
- Key Laboratory of Chemical Sensing and
Analysis in Universities of Shandong, School of Chemistry and Chemical
Engineering, University of Jinan, Jinan, Shandong 250022, P.R. China
| | - Min Zhu
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia
Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
| | - Hongmin Ma
- Key Laboratory of Chemical Sensing and
Analysis in Universities of Shandong, School of Chemistry and Chemical
Engineering, University of Jinan, Jinan, Shandong 250022, P.R. China
| | - Bin Du
- Key Laboratory of Chemical Sensing and
Analysis in Universities of Shandong, School of Chemistry and Chemical
Engineering, University of Jinan, Jinan, Shandong 250022, P.R. China
| | - Qin Wei
- Key Laboratory of Chemical Sensing and
Analysis in Universities of Shandong, School of Chemistry and Chemical
Engineering, University of Jinan, Jinan, Shandong 250022, P.R. China
| | - Yakun Wan
- Key Laboratory of Chemical Sensing and
Analysis in Universities of Shandong, School of Chemistry and Chemical
Engineering, University of Jinan, Jinan, Shandong 250022, P.R. China
- CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia
Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
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37
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Sun D, Lu J, Zhong Y, Yu Y, Wang Y, Zhang B, Chen Z. Sensitive electrochemical aptamer cytosensor for highly specific detection of cancer cells based on the hybrid nanoelectrocatalysts and enzyme for signal amplification. Biosens Bioelectron 2015; 75:301-7. [PMID: 26332382 DOI: 10.1016/j.bios.2015.08.056] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 08/19/2015] [Accepted: 08/23/2015] [Indexed: 11/15/2022]
Abstract
Human cancer is becoming a leading cause of death in the world and the development of a straightforward strategy for early detection of cancer is urgently required. Herein, a sandwich-type electrochemical aptamer cytosensor was developed for detection of human liver hepatocellular carcinoma cells (HepG2) based on the hybrid nanoelectrocatalysts and enzyme for signal amplification. The thiolated TLS11a aptamers were used as a selective bio-recognition element, attached to the gold nanoparticles (AuNPs) modified the glassy carbon electrode (GCE) surface. Meanwhile, the electrochemical nanoprobes were fabricated through the G-quadruplex/hemin/aptamer complexes and horseradish peroxidase (HRP) immobilized on the surfaces of Au@Pd core-shell nanoparticle-modified magnetic Fe3O4/MnO2 beads (Fe3O4/MnO2/Au@Pd). After the target cells were captured, the hybrid nanoprobes were further assembled to form an aptamer-cell-nanoprobes sandwich-like system on the electrode surface. Then, hybrid Fe3O4/MnO2/Au@Pd nanoelectrocatalysts, G-quadruplex/hemin HRP-mimicking DNAzymes and the natural HRP enzyme efficiently catalyzed the oxidation of hydroquinone (HQ) with H2O2, amplifying the electrochemical signals and improving the detection sensitivity. This electrochemical cytosensor delivered a wide detection range of 1×10(2)-1×10(7)cellsmL(-1), high sensitivity with a low detection limit of 15cellsmL(-1), good selectivity and repeatability. Finally, an electrochemical reductive desorption method was performed to break gold-thiol bond and desorb the components on the AuNPs/GCE for regenerating the cytosensor. These results have demonstrated that the electrochemical cytosensor has the potential to be a feasible tool for cost-effective cancer cell detection in early cancer diagnosis.
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Affiliation(s)
- Duanping Sun
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Jing Lu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Yuwen Zhong
- Center for Disease Control and Prevention of Guangdong Province, Guangzhou 511130, China.
| | - Yanyan Yu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Yu Wang
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Beibei Zhang
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Zuanguang Chen
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China.
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38
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Lv X, Li Y, Yan T, Pang X, Cao W, Du B, Wu D, Wei Q. Electrochemiluminescence modified electrodes based on RuSi@Ru(bpy)32+ loaded with gold functioned nanoporous CO/Co3O4 for detection of mycotoxin deoxynivalenol. Biosens Bioelectron 2015; 70:28-33. [DOI: 10.1016/j.bios.2015.03.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/25/2015] [Accepted: 03/09/2015] [Indexed: 11/28/2022]
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39
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Mazloum-Ardakani M, Hosseinzadeh L, Taleat Z. Synthesis and electrocatalytic effect of Ag@Pt core-shell nanoparticles supported on reduced graphene oxide for sensitive and simple label-free electrochemical aptasensor. Biosens Bioelectron 2015; 74:30-6. [PMID: 26094037 DOI: 10.1016/j.bios.2015.05.072] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 05/11/2015] [Accepted: 05/21/2015] [Indexed: 01/30/2023]
Abstract
Bimetallic Ag@Pt core-shell nanoparticles supported on reduced graphene oxide nanosheets (Ag@Pt-GRs) was synthesized and used as novel desirable sensor platform and electrocatalyst for catechol as probe in aptasensor. Gold screen-printed electrodes modified with Ag@Pt-GRs and applied to advance enzyme-free and label-free electrochemical aptasensor for detection of protein biomarker tumor necrosis factor-alpha (TNF-α). The morphology of the Ag@Pt-GRs could be characterized by transmission electron microscopy, X-ray diffraction and UV-vis spectra. The results showed that these nanocomposite exhibited attractive electrocatalytic activity and also yielded large surface area, which improve the amount of immobilized TNF-α aptamer. Due to the excellent electrocatalytic activity of Ag@Pt-GRs towards the oxidation of catechol, determination of TNF-α antigen was based on its obstruction to the electrocatalytic oxidation of catechol by Ag@Pt-GRs after binding to the surface of electrode through interaction with the aptamer. The calibration curve was obtained by differential pulse voltammetry and square wave voltammetry. Under optimum conditions, the results demonstrated that this electrochemical aptasensor possessed a dynamic range from 0.0 pg/mL to 60 pg/mL with a low detection limit of 2.07 pg/mL for TNF-α. The analytical usefulness of the aptasensor was finally demonstrated analyzing serum samples. The simple fabrication method, high sensitivity, specificity, good reproducibility and stability as well as acceptable accuracy for TNF-α detection in human serum samples are the main advantages of this aptasensor, which might have broad applications in protein diagnostics and bioassay.
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Affiliation(s)
| | - Laleh Hosseinzadeh
- Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran
| | - Zahra Taleat
- Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran
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40
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Meng Y. Synthesis and Adsorption Property of SiO₂@Co(OH)₂ Core-Shell Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2015; 5:554-564. [PMID: 28347025 PMCID: PMC5312898 DOI: 10.3390/nano5020554] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/17/2015] [Accepted: 03/19/2015] [Indexed: 11/16/2022]
Abstract
Silica nanoparticles were directly coated with cobalt hydroxide by homogeneous precipitation of slowly decomposing urea in cobalt nitrate solution. The cobalt hydroxide was amorphous, and its morphology was nanoflower-like. The BET (Brunauer-Emmett-Teller) surface area of the core-shell composite was 221 m²/g. Moreover, the possible formation procedure is proposed: the electropositive cobalt ions were first adsorbed on the electronegative silica nanoparticles surface, which hydrolyzed to form cobalt hydroxide nanoparticles. Then, the cobalt hydroxide nanoparticles were aggregated to form nanoflakes. Finally, the nanoflakes self-assembled, forming cobalt hydroxide nanoflowers. Adsorption measurement showed that the core-shell composite exhibited excellent adsorption capability of Rhodamine B (RB).
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Affiliation(s)
- Yongde Meng
- Department of Chemistry, Hanshan Normal University, Chaozhou 521041, China.
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41
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Dutta S, Ray C, Mallick S, Sarkar S, Roy A, Pal T. Au@Pd core–shell nanoparticles-decorated reduced graphene oxide: a highly sensitive and selective platform for electrochemical detection of hydrazine. RSC Adv 2015. [DOI: 10.1039/c5ra04817f] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An Aucore–Pdshell-decorated reduced graphene oxide nanocomposite is successfully employed for the electrochemical detection of low-level hydrazine in an aqueous solution.
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Affiliation(s)
- Soumen Dutta
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Chaiti Ray
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Sourav Mallick
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Sougata Sarkar
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Anindita Roy
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Tarasankar Pal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
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42
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Xu W, Xue S, Yi H, Jing P, Chai Y, Yuan R. A sensitive electrochemical aptasensor based on the co-catalysis of hemin/G-quadruplex, platinum nanoparticles and flower-like MnO2 nanosphere functionalized multi-walled carbon nanotubes. Chem Commun (Camb) 2015; 51:1472-4. [DOI: 10.1039/c4cc08860c] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sensitive thrombin electrochemical aptasensor is developed based on the co-catalysis of hemin/G-quadruplex, platinum nanoparticles and flower-like MnO2 nanosphere functionalized multi-walled carbon nanotubes.
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Affiliation(s)
- Wenju Xu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Shuyan Xue
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Huayu Yi
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Pei Jing
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Yaqin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
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