51
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El-Moghazy AY, Zhao C, Istamboulie G, Amaly N, Si Y, Noguer T, Sun G. Ultrasensitive label-free electrochemical immunosensor based on PVA-co-PE nanofibrous membrane for the detection of chloramphenicol residues in milk. Biosens Bioelectron 2018; 117:838-844. [PMID: 30096738 DOI: 10.1016/j.bios.2018.07.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 01/10/2023]
Abstract
An ultrasensitive label-free amperometric immunosensor for the detection of chloramphenicol (CAP) residues in milk has been developed by using a screen-printed carbon electrode laminated with a layer of poly (vinyl alcohol-co-ethylene) (PVA-co-PE) nanofibrous membrane that is covalently immobilized with a CAP antibody (anti-CAP). The performance of the PVA-co-PE nanofiber membrane (PVA-co-PE NFM) on the electrode was compared with a PVA-co-PE casted membrane (PVA-co-PE CM), necessary fabrication steps and performance of the sensors were investigated by electrochemical impedance spectroscopy (EIS). The application of the PVA-co-PE NFM decreased the electron-transfer-resistance by about 4 times compared with a conventional PVA-co-PE casted membrane. Under the optimal conditions, the established immunosensor exhibited high sensitivity for determination of CAP in a range 0.01-10 ng mL-1, with a limit of detection of 0.0047 ng mL-1. In addition to the good selectivity, reusability and stability over time, the prepared immunosensor was successfully used in the detection of CAP in milk samples without any pretreatment.
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Affiliation(s)
- Ahmed Y El-Moghazy
- Fiber and Polymer Science, University of California, Davis, CA 95616, USA; Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt.
| | - Cunyi Zhao
- Fiber and Polymer Science, University of California, Davis, CA 95616, USA
| | - Georges Istamboulie
- Univ. Perpignan Via Domitia, Biocapteurs-Analyses-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversite et Biotechnologies Microbiennes, USR 3579 Sorbonne Universit es (UPMC) Paris 6 et CNRS Observatoire Oceanologique, 66650 Banyuls-sur-Mer, France
| | - Noha Amaly
- Fiber and Polymer Science, University of California, Davis, CA 95616, USA; Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt
| | - Yang Si
- Fiber and Polymer Science, University of California, Davis, CA 95616, USA
| | - Thierry Noguer
- Univ. Perpignan Via Domitia, Biocapteurs-Analyses-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversite et Biotechnologies Microbiennes, USR 3579 Sorbonne Universit es (UPMC) Paris 6 et CNRS Observatoire Oceanologique, 66650 Banyuls-sur-Mer, France
| | - Gang Sun
- Fiber and Polymer Science, University of California, Davis, CA 95616, USA.
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52
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Fabrication of graphene film composite electrochemical biosensor as a pre-screening algal toxin detection tool in the event of water contamination. Sci Rep 2018; 8:10686. [PMID: 30013209 PMCID: PMC6048102 DOI: 10.1038/s41598-018-28959-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 07/02/2018] [Indexed: 11/08/2022] Open
Abstract
In this work, we fabricated a novel graphene film composite biosensor for microcystin-LR detection as an alternative to time-consuming, expensive, non-portable and often skills-demanding conventional methods of analysis involved in water quality monitoring and assessment. Excellent linear correlation (R2 = 0.99) of the electron-transfer resistance was achieved over a wide range of microcystin-LR (MC-LR) concentration, i.e. 0.005–10 μg/L. As-prepared graphene film composite biosensors can specifically detect MC-LR with remarkable sensitivity and detection limit (2.3 ng/L) much lower than the World Health Organization (WHO) provisional guideline limit of microcystin-LR concentration (i.e. 1 μg/L) in different water sources. Their great potential can be attributed to large active surface area of graphene film and efficient charge transfer process enabled by their high conductivity. Developed graphene film composite biosensors were also successfully applied to determination of MC-LR in several environmental water samples with high detection recovery, which offers a promising possibility of large-scale manufacture of sensor tips due to their macroscopic free-standing nature, the scalable fabrication route and easily tunable size.
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53
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Nezakati T, Seifalian A, Tan A, Seifalian AM. Conductive Polymers: Opportunities and Challenges in Biomedical Applications. Chem Rev 2018; 118:6766-6843. [DOI: 10.1021/acs.chemrev.6b00275] [Citation(s) in RCA: 354] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Toktam Nezakati
- Google Inc.., Mountain View, California 94043, United States
- Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London NW3 2QG, United Kingdom
| | - Amelia Seifalian
- UCL Medical School, University College London, London WC1E 6BT, United Kingdom
| | - Aaron Tan
- UCL Medical School, University College London, London WC1E 6BT, United Kingdom
| | - Alexander M. Seifalian
- NanoRegMed Ltd. (Nanotechnology and Regenerative Medicine Commercialization Centre), The London Innovation BioScience Centre, London NW1 0NH, United Kingdom
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54
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Eren E, Alver C, Karaca GY, Uygun E, Oksuz L, Oksuz AU. High-performance Flexible Complementary Electrochromic Device Based on Plasma Modified WO3
Nano Hybrids and V2
O5
Nanofilm with Low Operation Voltages. ELECTROANAL 2018. [DOI: 10.1002/elan.201800276] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Esin Eren
- Department of Chemistry, Faculty of Arts and Science; Suleyman Demirel University; 32260 Isparta Turkey
- Innovative Technologies Application and Research Center; Suleyman Demirel University; 32260 Isparta Turkey
| | - Ceyda Alver
- Department of Chemistry, Faculty of Arts and Science; Suleyman Demirel University; 32260 Isparta Turkey
| | - Gozde Yurdabak Karaca
- Department of Chemistry, Faculty of Arts and Science; Suleyman Demirel University; 32260 Isparta Turkey
| | - Emre Uygun
- Civil Engineering Department, Faculty of Engineering; Suleyman Demirel University; 32260 Isparta Turkey
- Techno Park Plazma Tek Company; Suleyman Demirel University; 32260 Isparta Turkey
| | - Lutfi Oksuz
- Department of Physics, Faculty of Arts and Science; Suleyman Demirel University; 32260 Isparta Turkey
- Techno Park Plazma Tek Company; Suleyman Demirel University; 32260 Isparta Turkey
| | - Aysegul Uygun Oksuz
- Department of Chemistry, Faculty of Arts and Science; Suleyman Demirel University; 32260 Isparta Turkey
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55
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Dailey J, Fichera M, Silbergeld E, Katz H. Impedance Spectroscopic Detection of Binding and Reactions in Acid-Labile Dielectric Polymers for Biosensor Applications. J Mater Chem B 2018; 6:2972-2981. [PMID: 30345059 PMCID: PMC6191049 DOI: 10.1039/c7tb03171h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We synthesized previously unreported copolymers with cleavable acid-labile side chains for use as electrochemical sensing layers in order to demonstrate a novel architecture for a one-step immunosensor. This one-step system is in contrast to most antigen-capture signal amplification methods that involve complicated secondary labeling techniques, or require the addition of redox probes to achieve a sensing response. A series of novel copolymers composed of various trityl-containing monomers were synthesized and characterized to determine their dielectric properties. Results indicate that the thin films of these polymers are stable in water, but some begin to degrade under acidic conditions or upon antigen binding, causing observable changes in the phase angle.
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Affiliation(s)
- Jennifer Dailey
- Department of Materials Science and Engineering, Whiting School of Engineering, Johns Hopkins University
| | - Michelangelo Fichera
- Department of Materials Science and Engineering, Whiting School of Engineering, Johns Hopkins University
| | - Ellen Silbergeld
- Department of Environmental Engineering, School of Public Health, Johns Hopkins University
| | - Howard Katz
- Department of Materials Science and Engineering, Whiting School of Engineering, Johns Hopkins University
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56
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Guerrero S, Agüí L, Yáñez-Sedeño P, Pingarrón JM. Screen-printed Gold Electrodes Functionalized with Grafted p-Aminobenzoic Acid for the Construction of Electrochemical Immunosensors. Determination of TGF-β1 Cytokine in Human Plasma. ELECTROANAL 2018. [DOI: 10.1002/elan.201700744] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Sara Guerrero
- Department of Analytical Chemistry, Faculty of Chemistry; University Complutense of Madrid; 28040- Madrid Spain
| | - Lourdes Agüí
- Department of Analytical Chemistry, Faculty of Chemistry; University Complutense of Madrid; 28040- Madrid Spain
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry; University Complutense of Madrid; 28040- Madrid Spain
| | - José M. Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry; University Complutense of Madrid; 28040- Madrid Spain
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57
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Plausinaitis D, Sinkevicius L, Mikoliunaite L, Plausinaitiene V, Ramanaviciene A, Ramanavicius A. Electrochemical polypyrrole formation from pyrrole 'adlayer'. Phys Chem Chem Phys 2018; 19:1029-1038. [PMID: 27942641 DOI: 10.1039/c6cp06545g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this research study, we investigated the morphology of polypyrrole nanostructures, which were formed during the electrochemical deposition of conducting polymer. An electrochemical quartz crystal microbalance (EQCM) cell equipped with a flow-through system was employed to exchange solutions of different compositions within the EQCM cell. When bare PBS buffer in the EQCM cell was exchanged with PBS buffer with pyrrole we observed a distinct increase in the resonance frequency Δf. This change in the resonance frequency and electrical capacitance, which was calculated from electrochemical impedance spectroscopy (EIS) data, illustrate that pyrrole on the surface of the gold electrode formed an adsorbed layer (adlayer). The formation of a pyrrole adlayer before the potential pulse that induced polymerization was investigated by QCM-based measurements. The electrochemical polymerization of this adlayer was induced by a single potential pulse and a nanostructured layer, which consisted of adsorbed polypyrrole (Ppy) nanoparticles with a diameter of 50 nm, was formed. QCM and EIS data revealed that by the next cycle of the electrochemical formation of Ppy, which was investigated after flow-through-based exchange of solutions, the initially formed Ppy surface was covered by the adlayer of pyrrole. This adlayer was desorbed when pyrrole was removed from the solution. When electrochemical polymerization was performed using 50 potential pulses, a Ppy layer, which had more complex morphology, was formed on the EQCM crystal. Scanning electron microscopy showed that the conductivity of this layer was unequally distributed. We observed that the polypyrrole layer formed by electrochemical deposition, which was performed using potential pulses, was formed out of aggregated spherical Ppy particles with a diameter of 50 nm.
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Affiliation(s)
- Deivis Plausinaitis
- Faculty of Chemistry, Department of Physical Chemistry, Vilnius University, Lithuania.
| | - Linas Sinkevicius
- Faculty of Chemistry, Department of Physical Chemistry, Vilnius University, Lithuania.
| | - Lina Mikoliunaite
- Faculty of Chemistry, Department of Physical Chemistry, Vilnius University, Lithuania.
| | | | - Almira Ramanaviciene
- Faculty of Chemistry, NanoTechnas - Centre of Nanotechnology and Materials Science, Department of Analytical and Environmental Chemistry, Vilnius University, Lithuania
| | - Arunas Ramanavicius
- Faculty of Chemistry, Department of Physical Chemistry, Vilnius University, Lithuania. and State Research Institute Centre for Physical Sciences and Technology, Laboratory of Bio-nanotechnology, Vilnius, Lithuania
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58
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Polypyrrole as Electrically Conductive Biomaterials: Synthesis, Biofunctionalization, Potential Applications and Challenges. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:347-370. [DOI: 10.1007/978-981-13-0950-2_18] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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59
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Tereshchenko A, Smyntyna V, Ramanavicius A. Interaction mechanism between TiO2 nanostructures and bovine leukemia virus proteins in photoluminescence-based immunosensors. RSC Adv 2018; 8:37740-37748. [PMID: 35558617 PMCID: PMC9089451 DOI: 10.1039/c8ra07347c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 10/24/2018] [Indexed: 01/05/2023] Open
Abstract
In this research a mechanism of interaction between a semiconducting TiO2 layer and bovine leukemia virus protein gp51, applied in the design of photoluminescence-based immunosensors, is proposed and discussed. Protein gp51 was adsorbed on the surface of a nanostructured TiO2 thin film, formed on glass substrates (TiO2/glass). A photoluminescence (PL) peak shift from 517 nm to 499 nm was observed after modification of the TiO2/glass by adsorbed gp51 (gp51/TiO2/glass). After incubation of the gp51/TiO2/glass in a solution containing anti-gp51, a new structure (anti-gp51/gp51/TiO2/glass) was formed and the PL peak shifted backwards from 499 nm to 516 nm. The above-mentioned PL shifts are attributed to the variations in the self-trapped exciton energy level, which were induced by the changes of electrostatic interaction between the adsorbed gp51 and the negatively charged TiO2 surface. The strength of the electric field affecting the photoluminescence centers, was determined from variations between the PL-spectra of TiO2/glass, gp51/TiO2/glass and anti-gp51/gp51/TiO2/glass. The principle of how these electric field variations are induced has been predicted. The highlighted origin of the changes in the photoluminescence spectra of TiO2 after its protein modification reveals an understanding of the interaction mechanism between TiO2 and proteins that is the key issue responsible for biosensor performance. In this research a mechanism of interaction between a semiconducting TiO2 layer and bovine leukemia virus protein gp51, applied in the design of photoluminescence-based immunosensors, is proposed and discussed.![]()
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Affiliation(s)
- Alla Tereshchenko
- Experimental Physics Department
- Faculty of Mathematics, Physics and Information Technologies
- Odesa National I.I. Mechnikov University
- Odesa
- Ukraine
| | - Valentyn Smyntyna
- Experimental Physics Department
- Faculty of Mathematics, Physics and Information Technologies
- Odesa National I.I. Mechnikov University
- Odesa
- Ukraine
| | - Arunas Ramanavicius
- Department of Physical Chemistry
- Institute of Chemistry
- Faculty of Chemistry and Geosciences
- Vilnius University
- LT-03225 Vilnius
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60
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Olajire AA. Corrosion inhibition of offshore oil and gas production facilities using organic compound inhibitors - A review. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.097] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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61
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RGD peptide doped polypyrrole film as a biomimetic electrode coating for impedimetric sensing of cell proliferation and cytotoxicity. J Appl Biomed 2017. [DOI: 10.1016/j.jab.2017.06.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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62
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Alarautalahti V, Hiltunen M, Onnela N, Nymark S, Kellomäki M, Hyttinen J. Polypyrrole-coated electrodes show thickness-dependent stability in different conditions during 42-day follow-up in vitro. J Biomed Mater Res B Appl Biomater 2017; 106:2202-2213. [PMID: 29058808 DOI: 10.1002/jbm.b.34024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/01/2017] [Accepted: 10/02/2017] [Indexed: 01/09/2023]
Abstract
Electroconductive polypyrrole/dodecylbenzenesulphonate (PPy/DBS) has been proposed as novel electrode coating for biomedical applications. However, as yet, little is known about its long-term stability in moist conditions. This study compares the stability of PPy/DBS-coated platinum electrodes that are either dry-stored, incubated, or both incubated and electrically stimulated. The electrical and material properties of three different coating thicknesses were monitored for 42 days. Initially, the PPy/DBS-coating decreased the low frequency impedance of the platinum electrodes by 52% to 79%. The dry-stored electrodes remained stable during the follow-up, whereas the properties of all the incubated electrodes were altered in three stages with thickness-dependent duration: stabilization, stable, and degradation. The coated electrodes would be applicable for short-term, low-frequency in vitro measurements of up to 14 days without electrical stimulation, and up to 7 days with stimulation. The coating thickness is bound to other coating properties, and should therefore be selected according to the specific target application. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2202-2213, 2018.
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Affiliation(s)
- V Alarautalahti
- Computational Biophysics and Imaging Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - M Hiltunen
- Biomaterials and Tissue Engineering Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - N Onnela
- Computational Biophysics and Imaging Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - S Nymark
- Biophysics of the Eye Research Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - M Kellomäki
- Biomaterials and Tissue Engineering Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
| | - J Hyttinen
- Computational Biophysics and Imaging Group, BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, Tampere, Finland
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63
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Design and tailoring of a three-dimensional reduced graphene oxide/helical carbon nanotube composite for electrochemical biosensing application. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3711-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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64
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Brosel-Oliu S, Galyamin D, Abramova N, Muñoz-Pascual FX, Bratov A. Impedimetric label-free sensor for specific bacteria endotoxin detection by surface charge registration. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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65
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Affiliation(s)
- Arun Kumar Prusty
- Biosensor Lab, Department of Chemistry; BITS; Pilani-K.K. Birla Goa Campus Goa 403726 India
| | - Sunil Bhand
- Biosensor Lab, Department of Chemistry; BITS; Pilani-K.K. Birla Goa Campus Goa 403726 India
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66
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Zhang W, Han C, Jia B, Saint C, Nadagouda M, Falaras P, Sygellou L, Vogiazi V, Dionysiou DD. A 3D graphene-based biosensor as an early microcystin-LR screening tool in sources of drinking water supply. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.03.161] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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67
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Dong T, Tang Q, Zhao K, Deng A, Li J. Ultrasensitive electrochemiluminescent salbutamol immunoassay with dual-signal amplification using CdSe@SiO2 as label and gold nanoparticles as substrate. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2081-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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68
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69
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Multiple signal amplified electrochemiluminescent immunoassay for brombuterol detection using gold nanoparticles and polyamidoamine dendrimers-silver nanoribbon. Anal Chim Acta 2016; 945:85-94. [DOI: 10.1016/j.aca.2016.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/27/2016] [Accepted: 10/03/2016] [Indexed: 10/20/2022]
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70
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Choudhary M, Yadav P, Singh A, Kaur S, Ramirez-Vick J, Chandra P, Arora K, Singh SP. CD 59 Targeted Ultrasensitive Electrochemical Immunosensor for Fast and Noninvasive Diagnosis of Oral Cancer. ELECTROANAL 2016. [DOI: 10.1002/elan.201600238] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Meenakshi Choudhary
- Advanced Instrumentation Research Facility; Jawaharlal Nehru University; New Delhi- 110067 India
- Department of Human Genetics; Punjabi University, Patiala Punjab- 147002 India
| | - Prashant Yadav
- CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg; New Delhi- 110012 India
| | - Anu Singh
- Advanced Instrumentation Research Facility; Jawaharlal Nehru University; New Delhi- 110067 India
| | - Satbir Kaur
- Department of Human Genetics; Punjabi University, Patiala Punjab- 147002 India
| | - Jaime Ramirez-Vick
- Department of Biomedical, Industrial & Human Factors Engineering; Wright State University; Dayton OH 45435 USA
| | - Pranjal Chandra
- Department of Biosciences and Bioengineering; Indian Institute of Technology - Guwahati; Guwahati - 781039, Assam India
| | - Kavita Arora
- Advanced Instrumentation Research Facility; Jawaharlal Nehru University; New Delhi- 110067 India
| | - Surinder P. Singh
- CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg; New Delhi- 110012 India
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71
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Dong T, Yangxiao K, Zhao K, Deng A, Li J. Signal Amplification Strategy for Highly Sensitive Detecting Brombuterol with Electrochemiluminescent Immunoassay by Using CdSe QDs as Label and Gold Nanoparticle as Substrate. ELECTROANAL 2016. [DOI: 10.1002/elan.201600332] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Tiantian Dong
- The Key Lab of Health Chemistry & Molecular Diagnosis of Suzhou; College of Chemistry, Chemical Engineering & Materials Science; Soochow University; Suzhou 215123 China
| | - Kete Yangxiao
- The Key Lab of Health Chemistry & Molecular Diagnosis of Suzhou; College of Chemistry, Chemical Engineering & Materials Science; Soochow University; Suzhou 215123 China
| | - Kang Zhao
- The Key Lab of Health Chemistry & Molecular Diagnosis of Suzhou; College of Chemistry, Chemical Engineering & Materials Science; Soochow University; Suzhou 215123 China
| | - Anping Deng
- The Key Lab of Health Chemistry & Molecular Diagnosis of Suzhou; College of Chemistry, Chemical Engineering & Materials Science; Soochow University; Suzhou 215123 China
| | - Jianguo Li
- The Key Lab of Health Chemistry & Molecular Diagnosis of Suzhou; College of Chemistry, Chemical Engineering & Materials Science; Soochow University; Suzhou 215123 China
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72
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Ma H, Li X, Yan T, Li Y, Zhang Y, Wu D, Wei Q, Du B. Electrochemiluminescent immunosensing of prostate-specific antigen based on silver nanoparticles-doped Pb (II) metal-organic framework. Biosens Bioelectron 2016; 79:379-85. [DOI: 10.1016/j.bios.2015.12.080] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 12/06/2015] [Accepted: 12/21/2015] [Indexed: 01/12/2023]
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73
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Aydemir N, Malmström J, Travas-Sejdic J. Conducting polymer based electrochemical biosensors. Phys Chem Chem Phys 2016; 18:8264-77. [DOI: 10.1039/c5cp06830d] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Conducting polymer (CP)-based electrochemical biosensors have gained great attention as such biosensor platforms are easy and cost-effective to fabricate, and provide a direct electrical readout of the presence of biological analytes with high sensitivity and selectivity.
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Affiliation(s)
- Nihan Aydemir
- Polymer Electronics Research Centre
- School of Chemical Sciences
- University of Auckland
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Jenny Malmström
- Polymer Electronics Research Centre
- School of Chemical Sciences
- University of Auckland
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - Jadranka Travas-Sejdic
- Polymer Electronics Research Centre
- School of Chemical Sciences
- University of Auckland
- New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology
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74
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The Study of Thin Films by Electrochemical Impedance Spectroscopy. NANOSTRUCTURES AND THIN FILMS FOR MULTIFUNCTIONAL APPLICATIONS 2016. [DOI: 10.1007/978-3-319-30198-3_1] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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75
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Eslami MR, Alizadeh N. Nanostructured conducting molecularly imprinted polypyrrole based quartz crystal microbalance sensor for naproxen determination and its electrochemical impedance study. RSC Adv 2016. [DOI: 10.1039/c5ra21489k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The overall process of preparation and sensing mechanism of naproxen (NAP) sensor.
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Affiliation(s)
| | - Naader Alizadeh
- Department of Chemistry
- Faculty of Sciences
- Tarbiat Modares University
- Tehran
- Iran
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76
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The effect of 3-amino benzoic acid linker and the reversal of donor–acceptor pairs on the electrochemical performance and stability of covalently bonded poly(pyrrole) nanotubes. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.09.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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77
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Tiu BDB, Advincula RC. Polymeric corrosion inhibitors for the oil and gas industry: Design principles and mechanism. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2015.08.006] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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78
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Lien TTN, Takamura Y, Tamiya E, Vestergaard MC. Modified screen printed electrode for development of a highly sensitive label-free impedimetric immunosensor to detect amyloid beta peptides. Anal Chim Acta 2015; 892:69-76. [PMID: 26388476 DOI: 10.1016/j.aca.2015.08.036] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 08/10/2015] [Accepted: 08/11/2015] [Indexed: 11/28/2022]
Abstract
Alzheimer's disease (AD) is a fatal neurodegenerative disease affecting approximately 26 million people world-wide, and the number is increasing as life expectancy increases. Since the only reliable diagnosis for the pathology is histochemical post-mortem examination, there is a rather urgent need for reliable, sensitive and quick detection techniques. Amyloid beta, being one of the established and widely accepted biomarkers of AD is a target biomolecule. Herein, we present fabrication of a labelless impedimetric amyloid beta immunosensor on carbon DEP (disposable electrochemical printed) chip. Three types of amyloid β impedimetric immunosensors were fabricated in a systematic step-wise manner in order to understand the effects that each surface modification chemistry had on detection sensitivity. We found that compared to a bare electrode, surface modification through formation of SAM of AuNPs increased sensitivity by approximately three orders of magnitude (LoD from 2.04 μM to 2.65 nM). A further modification using protein G, which helps orientate antibodies to an optimum position for interaction with antigen, lowered the LoD further to 0.57 nM. We have demonstrated that the presence of one of the most abundance proteins in biological fluids, bovine serum albumin (BSA), did not interfere with the sensitivity of the sensor. Since the DEP chips are disposable and the detection platform label-free, the developed sensor is relatively fast and cheap. These methods could easily be applied for detection of other antigens, with selection of the detection platform based on the desired for sensitivity.
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Affiliation(s)
- Truong T N Lien
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan; School of Engineering Physics, Hanoi University of Science and Technology (HUST), No.1 Dai Co Viet, Hai Ba Trung, Hanoi, Viet Nam
| | - Yuzuru Takamura
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Eiichi Tamiya
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mun'delanji C Vestergaard
- School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan; Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, Korimoto-1-21-24, Kagoshima City, Kagoshima, 890-0065, Japan.
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79
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Jiang L, Yang Y, Tu Y. A new strategy to develop the disposable label-free immunosensor with electrochemiluminescent probing. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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80
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Qiao L, Guo Y, Sun X, Jiao Y, Wang X. Electrochemical immunosensor with NiAl-layered double hydroxide/graphene nanocomposites and hollow gold nanospheres double-assisted signal amplification. Bioprocess Biosyst Eng 2015; 38:1455-68. [DOI: 10.1007/s00449-015-1388-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 03/05/2015] [Indexed: 11/29/2022]
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81
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Mazloum-Ardakani M, Hosseinzadeh L. Highly-sensitive label-free immunosensor for tumor necrosis factor α based on Ag@Pt core–shell nanoparticles supported on MWCNTs as an efficient electrocatalyst nanocomposite. RSC Adv 2015. [DOI: 10.1039/c5ra08016a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel label-free electrochemical immunosensor for enzyme-free determination of TNF-α biomarker was fabricated based on bimetallic Ag@Pt core–shell nanoparticles supported on MWCNTs as a desirable immunosensor platform.
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82
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Ramanavicius A, Genys P, Ramanaviciene A. Electrochemical Impedance Spectroscopy Based Evaluation of 1,10-Phenanthroline-5,6-dione and Glucose Oxidase Modified Graphite Electrode. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.08.130] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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83
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Sun S, Chen L, Shi H, Li Y, He X. Magnetic glass carbon electrode, modified with magnetic ferriferrous oxide nanoparticles coated with molecularly imprinted polymer films for electrochemical determination of bovine hemoglobin. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.09.034] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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84
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Highly sensitive electroluminescence immunoassay for Hg(II) ions based on the use of CdSe quantum dots, the methylmercury-6-mercaptonicotinic acid-ovalbumin conjugate, and a specific monoclonal antibody. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1343-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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85
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Li W, Yang H, Ma C, Li L, Ge S, Song X, Yu J, Yan M. Electrochemiluminescence of peroxydisulfate using flower-like Ag@Au-paper electrode and Pd@Au-assisted multiple enzymatic labels. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.06.130] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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86
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An electrochemical immunosensor for the tumor marker α-fetoprotein using a glassy carbon electrode modified with a poly(5-formylindole), single-wall carbon nanotubes, and coated with gold nanoparticles and antibody. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1313-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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87
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Tang Q, Cai F, Deng A, Li J. Ultrasensitive competitive electrochemiluminescence immunoassay for the β-adrenergic agonist phenylethanolamine A using quantum dots and enzymatic amplification. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1292-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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88
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Polypyrrole Composite Film for Highly Sensitive and Selective Electrochemical Determination Sensors. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.03.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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89
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Johne C, Fritzsch R, Ignaszak A. Three-Dimensionally Ordered Polypyrrole Electrode: Electrochemical Study on Capacity and Degradation Process. ELECTROANAL 2014. [DOI: 10.1002/elan.201400127] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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90
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Chen L, Zeng X, Si P, Chen Y, Chi Y, Kim DH, Chen G. Gold Nanoparticle-Graphite-Like C3N4 Nanosheet Nanohybrids Used for Electrochemiluminescent Immunosensor. Anal Chem 2014; 86:4188-95. [DOI: 10.1021/ac403635f] [Citation(s) in RCA: 309] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lichan Chen
- MOE Key
Laboratory of Analysis and Detection Technology for Food Safety, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore
| | - Xiaoting Zeng
- MOE Key
Laboratory of Analysis and Detection Technology for Food Safety, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Peng Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore
| | - Yingmei Chen
- MOE Key
Laboratory of Analysis and Detection Technology for Food Safety, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Yuwu Chi
- MOE Key
Laboratory of Analysis and Detection Technology for Food Safety, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Dong-Hwan Kim
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore
| | - Guonan Chen
- MOE Key
Laboratory of Analysis and Detection Technology for Food Safety, Fujian
Provincial Key Laboratory of Analysis and Detection Technology for
Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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91
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Zhang J, Cai F, Deng A, Li J. CdSe Quantum Dots Based Electrochemiluminescence Immunosensor with Simple Structure for Ultrasensitive Detection of Salbutamol. ELECTROANAL 2014. [DOI: 10.1002/elan.201300635] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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92
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Biointerfacial impedance characterization of reduced graphene oxide supported carboxyl pendant conducting copolymer based electrode. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.12.188] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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93
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He H, Peng X, Huang M, Chang G, Zhang X, Wang S. An electrochemical impedance sensor based on a small molecule modified Au electrode for the recognition of a trinucleotide repeat. Analyst 2014; 139:5482-7. [DOI: 10.1039/c4an00853g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A small molecule modified sensor was developed for the detection of XGG trinucleotide repeats (X = C, T) by electrochemical impedance spectroscopy.
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Affiliation(s)
- Hanping He
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei University
- Wuhan, PR China
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
| | - Xiaoqian Peng
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan, P. R. China
| | - Min Huang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan, P. R. China
| | - Gang Chang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei University
- Wuhan, PR China
| | - Xiuhua Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei University
- Wuhan, PR China
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
| | - Shengfu Wang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei University
- Wuhan, PR China
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
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94
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Nie G, Li C, Zhang L, Wang L. Fabrication of a simple and sensitive QDs-based electrochemiluminescence immunosensor using a nanostructured composite material for the detection of tumor markers alpha-fetoprotein. J Mater Chem B 2014; 2:8321-8328. [DOI: 10.1039/c4tb01308e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A simple label-free electrochemiluminescence immunosensor was fabricated for detection of alpha-fetoprotein (AFP) based on a nanostructured composite material (PICA–MWNT) with 2-aminoethanethiol modified CdSe nanoclusters as luminescent particles.
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Affiliation(s)
- Guangming Nie
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao 266042, People's Republic of China
| | - Chenxi Li
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao 266042, People's Republic of China
| | - Lin Zhang
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao 266042, People's Republic of China
| | - Ling Wang
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao 266042, People's Republic of China
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95
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The effect of pulse electropolymerization on the electrochemical properties of polythiophene films. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.10.063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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96
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Liu PZ, Hu XW, Mao CJ, Niu HL, Song JM, Jin BK, Zhang SY. Electrochemiluminescence immunosensor based on graphene oxide nanosheets/polyaniline nanowires/CdSe quantum dots nanocomposites for ultrasensitive determination of human interleukin-6. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.09.074] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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97
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An Immunosensor for Pathogenic Staphylococcus aureus Based on Antibody Modified Aminophenyl-Au Electrode. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/367872] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The objective of this work is to elaborate an immunosensing system which will detect and quantify Staphylococcus aureus bacteria. A gold electrode was modified by electrografting of 4-nitrophenyl diazonium, in situ synthesized in acidic aqueous solution. The immunosensor was fabricated by immobilizing affinity-purified polyclonal anti S. aureus antibodies on the modified gold electrode. Cyclic voltammetry (CV) and Faradaic Electrochemical Impedance Spectroscopy (EIS) were employed to characterize the stepwise assembly of the immunosensor. The performance of the developed immunosensor was evaluated by monitoring the electron-transfer resistance detected using Faradaic EIS. The experimental results indicated a linear relationship between the relative variation of the electron transfer resistance and the logarithmic value of S. aureus concentration, with a slope of 0.40 ± 0.08 per decade of concentration. A low quantification limit of 10±2 CFU per ml and a linear range up to 107±2×106 CFU per mL were obtained. The developed immunosensors showed high selectivity to Escherichia coli and Staphylococcus saprophyticus.
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98
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Onnela N, Savolainen V, Hiltunen M, Kellomäki M, Hyttinen J. Impedance spectra of polypyrrole coated platinum electrodes. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2013; 2013:539-42. [PMID: 24109743 DOI: 10.1109/embc.2013.6609556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Polypyrrole (PPy) coated electrodes may provide new solutions to increase the charge injection capacity and biocompatibility of metal electrodes in e.g., neural stimulus applications. In this study, electrical impedance spectra of PPy coated platinum (Pt) electrodes having three different coating thicknesses were measured and modeled. A suitable equivalent electrical circuit providing the material characteristics was chosen and the impedance data was analyzed using the model and data fitting. The modeled parameter values of different coating thicknesses were compared and our results demonstrated the changes in charge transfer properties and mechanisms of thin and thick PPy film coatings.
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99
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Geerets B, Peeters M, van Grinsven B, Bers K, de Ceuninck W, Wagner P. Optimizing the thermal read-out technique for MIP-based biomimetic sensors: towards nanomolar detection limits. SENSORS (BASEL, SWITZERLAND) 2013; 13:9148-59. [PMID: 23863857 PMCID: PMC3758641 DOI: 10.3390/s130709148] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Revised: 06/27/2013] [Accepted: 07/10/2013] [Indexed: 12/02/2022]
Abstract
In previous work, the novel heat-transfer method (HTM) for the detection of small molecules with Molecularly Imprinted Polymers (MIP)-type receptors was presented. In this study we focus on optimization of this sensor performance, with as final aim to lower the detection limit by reducing the noise level. It was determined that the noise originates foremost from the power supply, which can be controlled by varying the PID parameters. Therefore, the effect of the individual parameters was evaluated by tuning P, I and D separately at a temperature of 37 °C, giving a first indication of the optimal configuration. Next, a temperature profile was programmed and the standard deviation of the heat-transfer resistance over the entire regime was studied for a set of parameters. The optimal configuration, P1-I6-D0, reduced the noise level with nearly a factor of three compared to the original parameters of P10-I5-D0. With the optimized settings, the detection of L-nicotine in buffer solutions was studied and the detection limit improved significantly from 100 nM to 35 nM. Summarizing, optimization of the PID parameters and thereby improving the detection limit is a key parameter for first applications of the HTM-method for MIP receptors in analytical research.
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Affiliation(s)
- Bram Geerets
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium; E-Mails: (B.G.); (B.G.); (K.B.); (W.D.C.); (P.W.)
| | - Marloes Peeters
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium; E-Mails: (B.G.); (B.G.); (K.B.); (W.D.C.); (P.W.)
- IMEC vzw, Division IMOMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
| | - Bart van Grinsven
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium; E-Mails: (B.G.); (B.G.); (K.B.); (W.D.C.); (P.W.)
- IMEC vzw, Division IMOMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
| | - Karolien Bers
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium; E-Mails: (B.G.); (B.G.); (K.B.); (W.D.C.); (P.W.)
- IMEC vzw, Division IMOMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
| | - Ward de Ceuninck
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium; E-Mails: (B.G.); (B.G.); (K.B.); (W.D.C.); (P.W.)
- IMEC vzw, Division IMOMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
| | - Patrick Wagner
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, B-3590 Diepenbeek, Belgium; E-Mails: (B.G.); (B.G.); (K.B.); (W.D.C.); (P.W.)
- IMEC vzw, Division IMOMEC, Wetenschapspark 1, B-3590 Diepenbeek, Belgium
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100
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Tuan CV, Huy TQ, Hieu NV, Tuan MA, Trung T. Polyaniline Nanowires-Based Electrochemical Immunosensor for Label Free Detection of Japanese Encephalitis Virus. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.755688] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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