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Liustrovaite V, Drobysh M, Ratautaite V, Ramanaviciene A, Rimkute A, Simanavicius M, Dalgediene I, Kucinskaite-Kodze I, Plikusiene I, Chen CF, Viter R, Ramanavicius A. Electrochemical biosensor for the evaluation of monoclonal antibodies targeting the N protein of SARS-CoV-2 virus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171042. [PMID: 38369150 DOI: 10.1016/j.scitotenv.2024.171042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/11/2024] [Accepted: 02/15/2024] [Indexed: 02/20/2024]
Abstract
The emergence of COVID-19 caused by the coronavirus SARS-CoV-2 has prompted a global pandemic that requires continuous research and monitoring. This study presents a design of an electrochemical biosensing platform suitable for the evaluation of monoclonal antibodies targeting the SARS-CoV-2 nucleocapsid (N) protein. Screen-printed carbon electrodes (SPCE) modified with gold nanostructures (AuNS) were applied to design a versatile and sensitive sensing platform. Electrochemical techniques, including electrochemical impedance spectroscopy (EIS) and square wave voltammetry (SWV), were used to investigate the interactions between immobilised recombinant N (rN) protein and several monoclonal antibodies (mAbs). The electrochemical characterisation of SPCE/AuNS/rN demonstrated a successful immobilisation of rN, enhancing the electron transfer kinetics. Affinity interactions between immobilised rN and four mAbs (mAb-4B3, mAb-4G6, mAb-12B2, and mAb-1G5) were explored. Although mAb-4B3 showed some non-linearity, the other monoclonal antibodies exhibited specific and well-defined interactions followed by the formation of an immune complex. The biosensing platform demonstrated high sensitivity in the linear range (LR) from 0.2 nM to 1 nM with limits of detection (LOD) ranging from 0.012 nM to 0.016 nM for mAb-4G6, mAb-12B2, and mAb-1G5 and limits of quantification (LOQ) values ranging from 0.035 nM to 0.139 nM, as determined by both EIS and SWV methods. These results highlight the system's potential for precise and selective detection of monoclonal antibodies specific to the rN. This electrochemical biosensing platform provides a promising route for the sensitive and accurate detection of monoclonal antibodies specific to the rN protein.
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Affiliation(s)
- Viktorija Liustrovaite
- NanoTechnas - Center of Nanotechnology and Materials Science, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University (VU), Naugarduko St. 24, LT-03225 Vilnius, Lithuania; Department of Physical Chemistry, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University (VU), Naugarduko St. 24, LT-03225 Vilnius, Lithuania
| | - Maryia Drobysh
- Department of Physical Chemistry, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University (VU), Naugarduko St. 24, LT-03225 Vilnius, Lithuania; Department of Nanotechnology, State Research Institute Center for Physical and Technological Sciences (FTMC), Sauletekio Ave. 3, Vilnius, Lithuania
| | - Vilma Ratautaite
- Department of Nanotechnology, State Research Institute Center for Physical and Technological Sciences (FTMC), Sauletekio Ave. 3, Vilnius, Lithuania
| | - Almira Ramanaviciene
- NanoTechnas - Center of Nanotechnology and Materials Science, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University (VU), Naugarduko St. 24, LT-03225 Vilnius, Lithuania
| | - Agne Rimkute
- Institute of Biotechnology, Life Sciences Center, Vilnius University (VU), Sauletekio Ave. 7, Vilnius, Lithuania
| | - Martynas Simanavicius
- Institute of Biotechnology, Life Sciences Center, Vilnius University (VU), Sauletekio Ave. 7, Vilnius, Lithuania
| | - Indre Dalgediene
- Institute of Biotechnology, Life Sciences Center, Vilnius University (VU), Sauletekio Ave. 7, Vilnius, Lithuania
| | - Indre Kucinskaite-Kodze
- Institute of Biotechnology, Life Sciences Center, Vilnius University (VU), Sauletekio Ave. 7, Vilnius, Lithuania
| | - Ieva Plikusiene
- NanoTechnas - Center of Nanotechnology and Materials Science, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University (VU), Naugarduko St. 24, LT-03225 Vilnius, Lithuania
| | - Chien-Fu Chen
- Institute of Applied Mechanics, National Taiwan University, Taipei City 106, Taiwan.
| | - Roman Viter
- Institute of Atomic Physics and Spectroscopy, University of Latvia, 19 Raina Blvd., Riga, LV 1586, Latvia; Center for Collective Use of Scientific Equipment, Sumy State University, 31, Sanatornaya st., 40018 Sumy, Ukraine.
| | - Arunas Ramanavicius
- Department of Physical Chemistry, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University (VU), Naugarduko St. 24, LT-03225 Vilnius, Lithuania; Department of Nanotechnology, State Research Institute Center for Physical and Technological Sciences (FTMC), Sauletekio Ave. 3, Vilnius, Lithuania.
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Paul M, Kühnel H, Oberpertinger R, Mehofer C, Pollhammer D, Wellenzohn M. Two-Layer Inkjet-Printed Microwave Split-Ring Resonators for Detecting Analyte Binding to the Gold Surface. SENSORS (BASEL, SWITZERLAND) 2024; 24:1688. [PMID: 38475224 DOI: 10.3390/s24051688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/26/2024] [Accepted: 03/02/2024] [Indexed: 03/14/2024]
Abstract
This work focuses on demonstrating the working principle of inkjet-printed Au nanoparticle (NP) two-layer Gigahertz (2.6 GHz) microwave split-ring resonators (SRRs) as a novel platform for the detection of analytes on flexible substrates. In contrast to the standard fabrication of split-ring resonator biosensors using printed circuit board technology, which results in a seven-layer system, the resonators in this work were fabricated using a two-layer system. A ground plane is embedded in the SRR measurement setup. In this method, a microwave electromagnetic wave is coupled into the Au SRR via an inkjet-printed Cu-NP stripline that is photonically sintered. This coupling mechanism facilitates the detection of analytes by inducing resonance shifts in the SRR. In this study, the functionality of the printed sensors was demonstrated using two different Au functionalization processes, firstly, with HS-PEG7500-COOH, and, secondly, with protein G with an N-terminal cysteine residue. The sensing capabilities of the printed structures are shown by the attachment of biomolecules to the SRR and the measurement of the resulting resonance shift. The experiments show a clear shift of the resonance frequency in the range of 20-30 MHz for both approaches. These results demonstrate the functionality of the simplified printed two-layer microwave split-ring resonator for use as a biosensor.
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Affiliation(s)
- Matthias Paul
- Department of Engineering, Applied Electronics and Technical Informatics, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
- Competence Center for IT-Security, Department of Engineering, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
| | - Harald Kühnel
- Department of Applied Life Sciences, Bioengineering, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
| | - Rudolf Oberpertinger
- Department of Engineering, Applied Electronics and Technical Informatics, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
| | - Christoph Mehofer
- Department of Engineering, High Tech Manufacturing, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
| | - Doris Pollhammer
- Department of Applied Life Sciences, Bioengineering, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
| | - Markus Wellenzohn
- Department of Engineering, Applied Electronics and Technical Informatics, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
- Competence Center for IT-Security, Department of Engineering, University of Applied Sciences Vienna (FH Campus Wien), 1100 Vienna, Austria
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3
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Calabrese A, Capo A, Capaccio A, Agovino E, Varriale A, Pascale M, D'Auria S, Staiano M. An Impedance-Based Immunosensor for the Detection of Ovalbumin in White Wine. BIOSENSORS 2023; 13:669. [PMID: 37504068 PMCID: PMC10377481 DOI: 10.3390/bios13070669] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/17/2023] [Accepted: 06/20/2023] [Indexed: 07/29/2023]
Abstract
Food allergies are an exceptional response of the immune system caused by the ingestion of specific foods. The main foods responsible for allergic reactions are milk, eggs, seafood, soy, peanuts, tree nuts, wheat, and their derived products. Chicken egg ovalbumin (OVA), a common allergen molecule, is often used for the clarification process of wine. Traces of OVA remain in the wine during the fining process, and they can cause significant allergic reactions in sensitive consumers. Consequently, the European Food Safety Authority (EFSA) and the American Food and Drug Administration (FDA) have shown the risks for allergic people to assume allergenic foods and food ingredients, including eggs. Commonly, OVA detection requires sophisticated and time-consuming analytical techniques. Intending to develop a faster assay, we designed a proof-of-concept non-Faradaic impedimetric immunosensor for monitoring the presence of OVA in wine. Polyclonal antibodies anti-OVA were covalently immobilised onto an 11-mercaptoundecanoic-acid (11-MUA)-modified gold surface. The developed immunosensor was able to detect OVA in diluted white wine without the need for an external probe or any pre-treatment step with a sensitivity of 0.20 µg/mL, complying with the limit established by the resolution OIV/COMEX 502-2012 for the quantification of allergens in wine.
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Affiliation(s)
| | | | | | | | | | | | - Sabato D'Auria
- Department of Biology, Agriculture and Food Science, CNR, Piazzale Aldo Moro, 7, 00185 Rome, Italy
| | - Maria Staiano
- Institute of Food Science, CNR, 83100 Avellino, Italy
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Sensitive determination of benzo(a)pyrene in vegetable oils based on the electrochemiluminescence quenching of ruthenium (II) dipyrido[3,2-a:2′,3′-c]phenazine complex. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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5
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Rong G, Zheng Y, Li X, Guo M, Su Y, Bian S, Dang B, Chen Y, Zhang Y, Shen L, Jin H, Yan R, Wen L, Zhu P, Sawan M. A high-throughput fully automatic biosensing platform for efficient COVID-19 detection. Biosens Bioelectron 2022; 220:114861. [PMCID: PMC9630290 DOI: 10.1016/j.bios.2022.114861] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 09/19/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
Abstract
We propose a label-free biosensor based on a porous silicon resonant microcavity and localized surface plasmon resonance. The biosensor detects SARS-CoV-2 antigen based on engineered trimeric angiotensin converting enzyme-2 binding protein, which is conserved across different variants. Robotic arms run the detection process including sample loading, incubation, sensor surface rinsing, and optical measurements using a portable spectrometer. Both the biosensor and the optical measurement system are readily scalable to accommodate testing a wide range of sample numbers. The limit of detection is 100 TCID50/ml. The detection time is 5 min, and the throughput of one single robotic site is up to 384 specimens in 30 min. The measurement interface requires little training, has standard operation, and therefore is suitable for widespread use in rapid and onsite COVID-19 screening or surveillance.
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Affiliation(s)
- Guoguang Rong
- CenBRAIN Neurotech, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China
| | - Yuqiao Zheng
- CenBRAIN Neurotech, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China
| | - Xiangqing Li
- School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China
| | - Mengzhun Guo
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake, University, Hangzhou, Zhejiang, 310030, China,Center for Infectious Disease Research, Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, 310030, China,Institute of Biology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310030, China
| | - Yi Su
- CenBRAIN Neurotech, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China
| | - Sumin Bian
- CenBRAIN Neurotech, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China
| | - Bobo Dang
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake, University, Hangzhou, Zhejiang, 310030, China,Center for Infectious Disease Research, Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, 310030, China,Institute of Biology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310030, China
| | - Yin Chen
- Zhejiang Provincial Center for Disease Control and Prevention, 3399 Binsheng Road, Hangzhou, Zhejiang, 310051, China
| | - Yanjun Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, 3399 Binsheng Road, Hangzhou, Zhejiang, 310051, China
| | - Linhai Shen
- Hangzhou Center for Disease Control and Prevention, 568 Mingshi Road, Jianggan District, Hangzhou, Zhejiang, 310021, China
| | - Hui Jin
- Hangzhou Center for Disease Control and Prevention, 568 Mingshi Road, Jianggan District, Hangzhou, Zhejiang, 310021, China
| | - Renhong Yan
- Key Laboratory of Structural Biology of Zhejiang Province, School of Life Sciences, Westlake, University, Hangzhou, Zhejiang, 310030, China,Center for Infectious Disease Research, Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, 310030, China
| | - Liaoyong Wen
- School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China
| | - Peixi Zhu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, Zhejiang, 310014, China
| | - Mohamad Sawan
- CenBRAIN Neurotech, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China,Institute of Advanced Study, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, 310024, China,Corresponding author. CenBRAIN Neurotech, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou, Zhejiang, 310030, China
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Barhoum A, J Forster R. Label-free electrochemical immunosensor for picomolar detection of the cervical cancer biomarker MCM5. Anal Chim Acta 2022; 1225:340226. [PMID: 36038236 DOI: 10.1016/j.aca.2022.340226] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/28/2022] [Accepted: 07/31/2022] [Indexed: 01/15/2023]
Abstract
An immunosensor for label-free electrochemical detection of MiniChromosome Maintenance Protein 5, MCM5, a protein overexpressed in cervical cancer, based on a gold electrode is reported. The electrode was first modified with a submonolayer (capture layer) of 11-mercaptoundecanoic acid (11-MUA) and then activated with N-(3-dimethylaminopropyl)-N-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) to immobilize the capture antibody. The change in electrode surface properties (wettability) during the formation of the 11-MUA layers was determined using the static water contact angle (WCA). The binding of MCM5 antigens to the capture antibody was monitored by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using 5 mM [Fe(CN)6]3-/4- in 0.1 M LiClO4(aq) as an electroactive probe. AC Impedance was used to measure charge transfer resistance (Rct), which reflects impeded electron transfer when the antigen is bound to the antibody functionalized surface. After exposing the antibody-functionalized surface to MCM5 antigens, Rct increases linearly with the logarithmic value of MCM5 antigen concentration, with a linear dynamic range of 10-6 to 10-11 g/mL, a correlation coefficient of 0.99, and a detection limit of 2.9 pM (10-11 g/mL). This excellent sensitivity was achieved with simple preparation steps and minimal reagent consumption, without the need for complicated procedures such as enzymatic amplification, fluorescent labeling, or nanoparticle modification.
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Affiliation(s)
- Ahmed Barhoum
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, D09 V209, Ireland.
| | - Robert J Forster
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, D09 V209, Ireland
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Yan Y, Qiu C, Qu W, Zhuang Y, Chen K, Wang C, Zhang R, Wang P, Wu Y, Gao J. Detection of BaP in seawater based on multi-walled carbon nanotubes composites immunosenor. Front Chem 2022; 10:950854. [PMID: 36092661 PMCID: PMC9452799 DOI: 10.3389/fchem.2022.950854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/29/2022] [Indexed: 11/13/2022] Open
Abstract
Benzo(a)pyrene, as the main polycyclic aromatic hydrocarbon pollutant in marine oil spill pollution, has negative effects on marine ecology and human health. A facile and sensitive method of rapid benzo(a)pyrene detection in seawater is essential for marine conservation. In this paper, a novel immunosensor is fabricated using a multi-walled carbon nanotubes-chitosan composite loaded with benzo(a)pyrene antibody. This immunosensor is based on a biosensing assay mechanism that uses multi-walled carbon nanotubes-chitosan composites as conductive mediators to enhance electron transfer kinetics. Then, potassium ferricyanide was used as an electrochemical probe to produce an electrochemical signal for the voltammetric behavior investigation of the immune response by differential pulse voltammetry. Under optimal experimental conditions, the peak current change was inversely proportional to the benzo(a)pyrene concentration in the range of 0.5 ng⋅ml−1 and 80 ng⋅ml−1 with a detection limit of 0.27 ng⋅ml−1. The immunosensor was successfully applied to assay BaP in seawater, and the recovery was between 96.6 and 100%, which exhibited a novel, sensitive and interference-resistant analytical method for real-time water environment monitoring. The results demonstrate that the proposed immunosensor has a great potential for application in the monitoring of seawater.
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Affiliation(s)
- Yirou Yan
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Chengjun Qiu
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
- *Correspondence: Chengjun Qiu,
| | - Wei Qu
- College of Electronic and Information Engineering, Beibu Gulf University, Qinzhou, China
| | - Yuan Zhuang
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Kaixuan Chen
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Cong Wang
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Ruoyu Zhang
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Ping Wang
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Yuxuan Wu
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
| | - Jiaqi Gao
- College of Mechanical, Naval Architecture and Ocean Engineering, Beibu Gulf University, Qinzhou, China
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Shaban SM, Byeok Jo S, Hafez E, Ho Cho J, Kim DH. A comprehensive overview on alkaline phosphatase targeting and reporting assays. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214567] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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9
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Catalyst-controlled functionalization of carboxylic acids by electrooxidation of self-assembled carboxyl monolayers. Nat Commun 2022; 13:1319. [PMID: 35288543 PMCID: PMC8921278 DOI: 10.1038/s41467-022-28992-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/15/2022] [Indexed: 12/26/2022] Open
Abstract
While the electrooxidative activation of carboxylic acids is an attractive synthetic methodology, the resulting transformations are generally limited to either homocoupling or further oxidation followed by solvent capture. These reactions require extensive electrolysis at high potentials, which ultimately renders the methodology incompatible with metal catalysts that could possibly provide new and complementary product distributions. This work establishes a proof-of-concept for a rare and synthetically-underutilized strategy for selective electrooxidation of carboxylic acids in the presence of oxidatively-sensitive catalysts that control reaction selectivity. We leverage the formation of self-adsorbed monolayers of carboxylate substrates at the anode to promote selective oxidation of the adsorbed carboxylate over a more easily-oxidized catalyst. Consequently, reactions operate at lower potentials, greater faradaic efficiencies, and improved catalyst compatibility over conventional approaches, which enables reactions to be performed with inexpensive Fe complexes that catalyze selective radical additions to olefins. This work leverages substrate self-assembly at an electrode to promote selective substrate electrooxidation in the presence of oxidatively sensitive catalysts. This strategy is applied to decarboxylative coupling of carboxylic acids with olefins.
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Farcău C. Silver film over nanospheres (AgFoN) as tri-modal plasmonic sensing platform for Surface Plasmon Resonance Spectroscopy, Surface-Enhanced Raman Scattering, and Surface-Enhanced Fluorescence. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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11
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Deshmukh R, Roy U, Bhand S. A Novel Electrochemical Genosensor for Specific Detection of xanQ Genein Escherichia coli Strains in Water. CURR ANAL CHEM 2022. [DOI: 10.2174/1573411018666220126094751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
A rapid and specific detection of pathogens is of great importance from public health viewpoint as well as from economic perspectives. Genosensor based on sequence specific detection of Escherichia coli facilitates significant improvements in rapidity and specificity over traditional microbiological methods.
Objective:
The present study was aimed to identify a sequence of xanQ genetic marker for designing the DNA sensing probe and to fabricate a genosensor using the interdigitated gold electrode (IDE). A label-free genosensor for E. coli detection in water by a novel nucleic acid sensing probe, URecA1016 is reported. The URecA1016 sensing probe-functionalized gold-interdigitated electrode surface by covalent coupling using 11Mercaptoundecanoic acid (crosslinker) to develop the electrochemical genosensor.
Results:
Upon DNA hybridization, the non-Faradaic sensing measurements showed a decreasing capacitance value with 10 min response time at 120 Hz frequency and 10 mV applied potential. The linearity range of the genosensor was between 1 and 1000 pg/mL for DNA of E. coli with limit of quantification (LoQ) of 1.27 pg DNA/mL of E. coli (equivalent to approximately 150 CFU/mL) at 95% confidence. Whilst the genosensor was E. coli species-specific as has been tested for detection of E. coli MTCC 3221, E. coli O157:H7 ATCC 43895, E. coli O78:H11 MTCC 723 any cross-reactivity could not be observed with DNA of Shigella flexneri MTCC 9543 and Bacillus subtilis MTCC 736. The capacitance change responses were also recorded and discussed.
Conclusions:
The URecA1016 sensing probe was found to be specific for detection of different E. coli species spiked in water. The results obtained in our study demonstrated the possible application potential of genosensor for E. coli detection in real water samples.
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Affiliation(s)
- Rehan Deshmukh
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Goa Campus, NH17B Bypass, Goa 403726, India
- School of Biology, Faculty of Science, Dr. Vishwanath Karad MIT World Peace University, Pune, India
| | - Utpal Roy
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Goa Campus, NH17B Bypass, Goa 403726, India
| | - Sunil Bhand
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Goa Campus, NH17B Bypass, Goa 403726, India
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Electrochemical Development of an Immunosensor for Detection Polychlorinated biphenyls (PCBs) for Environmental Analysis. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9110307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polychlorinated biphenyls (PCBs) are a highly toxic family of synthetic chemical compounds. PCBs are widely spread in the environment and their toxicity can cause serious ailments to living organisms such as cancer; therefore, developing a device for the detection of PCBs in the environment is significant. In this paper, polyclonal primary anti-PCB antibodies were immobilized onto a gold screen-printed electrode with the purpose of creating an electrochemical immunosensor for the detection of Aroclor 1254. It was modified with 11-mercaptoundecanoic acid (11-MUA) and the activation of the carboxylic acid terminal was performed by cross-linking 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hyrodsuccinmide (NHS) on the electrode surface. Cyclic voltammetry, electrochemical impedance spectroscopy (EIS), linear sweep voltammetry, atomic force microscopy (AFM), scanning electron microscopy (SEM), and contact angle measurement were employed to characterize SAM development on the gold electrode. Using a competitive assay, a 0.09 ng/mL−1 limit of detection and a linear range of 0.101–220 ng/mL−1 were determined. The self-assembled monolayers (SAM) were successful in encapsulating the PCBs on the immunosensor. The electrochemical detection showed better resolution when compared to traditional methods such as the ELISA optical technique. The novel electrochemical immunosensor approach that is discussed in this paper has the potential to offer rapid sample screening in a portable, disposable format and could contribute to the effective control and prevention of PCBs in the environment.
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Yao J, Xu X, Liu L, Kuang H, Wang Z, Xu C. A gold-based strip sensor for the detection of benzo[ a]pyrene in edible oils. Analyst 2021; 146:3871-3879. [PMID: 34028472 DOI: 10.1039/d1an00612f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
This report describes the development of a sensitive and broadly specific indirect competitive enzyme-linked immunosorbent assay (icELISA) and a gold nanoparticle-based immunochromatographic strip (GNP-ICS) assay for the detection of benzo[a]pyrene (B[a]P), using an anti-B[a]P monoclonal antibody (mAb). A broad-specific anti-B[a]P mAb (4E8) was raised from two types of haptens, with half maximal inhibitory concentrations and limits of detection (LOD) values of 2.51 and 0.54 ng mL-1, respectively. In addition, the cross-reactivity was up to 390% with structurally related compounds. The GNP-ICS assay based on a GNP-labeled mAb showed broad specificity in the detection of B[a]P and its analogues, with cut-off and visual LOD values of 100 and 10 ng mL-1, respectively. Furthermore, the recoveries from the developed icELISA and GNP-ICS assay in edible oil samples spiked with B[a]P were validated by high-performance liquid chromatography-fluorescence detection. The results revealed that the icELISA could reliably detect B[a]P in edible oils.
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Affiliation(s)
- Jingjing Yao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China. and International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Xinxin Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China. and International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Liqiang Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China. and International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Hua Kuang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China. and International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
| | - Zhengyou Wang
- Standards & Quality Center of National Food and Strategic Reserves Administration, Xicheng District, 100037 Beijing, China
| | - Chuanlai Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China. and International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, People's Republic of China
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Chen JS, Chen PF, Lin HTH, Huang NT. A Localized surface plasmon resonance (LSPR) sensor integrated automated microfluidic system for multiplex inflammatory biomarker detection. Analyst 2021; 145:7654-7661. [PMID: 32966364 DOI: 10.1039/d0an01201g] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Inflammation is a complex biological response of the human body to external or internal stimuli, such as invading pathogens, defective cells, or irritating substances. One important indicator of inflammatory conditions or the progress of various diseases, such as cancer, cardiovascular diseases, neurological diseases, connective tissue diseases, sepsis, or Alzheimer's disease, is the concentration level of inflammatory biomarkers, including immunoglobulins, cytokines, and C-reactive protein (CRP). Since inflammatory biomarkers are highly correlated with each other, it is important to measure them simultaneously. To enable continuous and dynamic inflammatory biomarker detection, we utilized localized surface plasmon resonance (LSPR) to perform label-free molecule sensing. Since the LSPR sensing mechanism requires only a small sensing area with simplified optical setup, it can be easily integrated with a microfluidic device. To simplify reagent operation complexity, we developed an automated microfluidic control system to control reagent guiding and switching in the immunoassay with less manual processes and potential operation errors. Our results successfully demonstrated multiplex IgG, TNF-α, and CRP measurement with only 60 μL assay volume and 3.5 h assay time. In each test, 20 sensing spot measurements under four different reagent conditions can be performed. Overall, we envision that the LSPR sensor integrated automated microfluidic control system could perform rapid, multiplex, and multiparallel continuous inflammatory biomarker detection, which would be beneficial for various applications, such as immune status monitoring, diagnosis and prognosis of inflammatory diseases.
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Affiliation(s)
- Jhih-Siang Chen
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, 10617, Taiwan.
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15
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Nayak J, Sahoo SK, Kumar R. Study of Anticancer Drugs Interaction with Hemoglobin by Electrochemical Methods and Molecular Docking: Implications towards Anticancer Treatment. ChemistrySelect 2021. [DOI: 10.1002/slct.202100424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jyotsnamayee Nayak
- Department of Chemistry S.V. National Institute of Technology Surat 395007 India
| | - Suban K. Sahoo
- Department of Chemistry S.V. National Institute of Technology Surat 395007 India
| | - Rajender Kumar
- Department of Chemistry and Chemical Sciences, School of Physical and Material Sciences Central University of Himachal Pradesh, Kangra Himachal Pradesh 176215 India
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Piovarci I, Melikishvili S, Tatarko M, Hianik T, Thompson M. Detection of Sub-Nanomolar Concentration of Trypsin by Thickness-Shear Mode Acoustic Biosensor and Spectrophotometry. BIOSENSORS 2021; 11:117. [PMID: 33920444 PMCID: PMC8070231 DOI: 10.3390/bios11040117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/26/2021] [Accepted: 04/06/2021] [Indexed: 05/03/2023]
Abstract
The determination of protease activity is very important for disease diagnosis, drug development, and quality and safety assurance for dairy products. Therefore, the development of low-cost and sensitive methods for assessing protease activity is crucial. We report two approaches for monitoring protease activity: in a volume and at surface, via colorimetric and acoustic wave-based biosensors operated in the thickness-shear mode (TSM), respectively. The TSM sensor was based on a β-casein substrate immobilized on a piezoelectric quartz crystal transducer. After an enzymatic reaction with trypsin, it cleaved the surface-bound β-casein, which increased the resonant frequency of the crystal. The limit of detection (LOD) was 0.48 ± 0.08 nM. A label-free colorimetric assay for trypsin detection has also been performed using β-casein and 6-mercaptohexanol (MCH) functionalized gold nanoparticles (AuNPs/MCH-β-casein). Due to the trypsin cleavage of β-casein, the gold nanoparticles lost shelter, and MCH increased the attractive force between the modified AuNPs. Consequently, AuNPs aggregated, and the red shift of the absorption spectra was observed. Spectrophotometric assay enabled an LOD of 0.42 ± 0.03 nM. The Michaelis-Menten constant, KM, for reverse enzyme reaction has also been estimated by both methods. This value for the colorimetric assay (0.56 ± 0.10 nM) is lower in comparison with those for the TSM sensor (0.92 ± 0.44 nM). This is likely due to the better access of the trypsin to the β-casein substrate at the surface of AuNPs in comparison with those at the TSM transducer.
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Affiliation(s)
- Ivan Piovarci
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina F1, 84248 Bratislava, Slovakia; (I.P.); (S.M.); (M.T.)
| | - Sopio Melikishvili
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina F1, 84248 Bratislava, Slovakia; (I.P.); (S.M.); (M.T.)
| | - Marek Tatarko
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina F1, 84248 Bratislava, Slovakia; (I.P.); (S.M.); (M.T.)
| | - Tibor Hianik
- Department of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina F1, 84248 Bratislava, Slovakia; (I.P.); (S.M.); (M.T.)
| | - Michael Thompson
- Lash Miller Laboratories, Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada
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YaĞar H, Özcan HM, Mehmet O. A new electrochemical impedance biosensor based on aromatic thiol for alpha-1 antitrypsin determination. Turk J Chem 2021; 45:104-118. [PMID: 33679157 PMCID: PMC7925324 DOI: 10.3906/kim-2007-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/19/2020] [Indexed: 11/03/2022] Open
Abstract
Alpha-1 antitrypsin (A1AT) is one of the acute phase proteins which are synthesized in the liver. A1AT inhibits the activity of many proteases, but its main task is to protect the lungs from the attack of neutrophil elastase. In an autosomal hereditary disease known as alpha-1 antitrypsin deficiency, the A1AT level in blood serum decreases, increasing the risk of developing emphysema, liver apoptosis, and liver cancer. Thus, the detection of A1AT concentration in blood serum is very important. In this study, an impedimetric biosensor was developed, forming an SAM (self-assembled monolayer) with 4-mercaptophenylacetic acid (4MPA) on the surface of the gold electrode. An A1AT biosensor was constructed using immobilization of an A1AT-specific antibody (anti-A1AT) after activating the carboxyl groups of 4MPA with EDC/NHS. Each immobilization stage was characterized by using electrochemical impedance spectroscopy, cyclic voltammetry, and scanning electron microscopy with energy dispersive X-ray spectroscopy. With the designed biosensor, precise and highly reproducible results were obtained for A1AT concentrations in the range of 100-600 µg/mL. A1AT detection was also successfully carried out in artificial serum solutions spiked with A1AT.
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Affiliation(s)
- Hülya YaĞar
- Department of Chemistry, Faculty of Science, Trakya University, Edirne Turkey
| | - Hakkı Mevlüt Özcan
- Department of Chemistry, Faculty of Science, Trakya University, Edirne Turkey
| | - Osman Mehmet
- Department of Chemistry, Faculty of Science, Trakya University, Edirne Turkey
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18
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Zainal PNS, Alang Ahmad SA, Abdul Aziz SFN, Rosly NZ. Polycyclic Aromatic Hydrocarbons: Occurrence, Electroanalysis, Challenges, and Future Outlooks. Crit Rev Anal Chem 2020; 52:878-896. [PMID: 33155481 DOI: 10.1080/10408347.2020.1839736] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
The past several decades have seen increasing concern regarding the wide distribution of polycyclic aromatic hydrocarbons (PAHs) in environmental matrices. Primary toxicological data show PAHs' persistent characteristics and possible toxicity effects. Because of this pressing global issue, electroanalytical methods have been introduced. These methods are effective for PAH determination in environmental waters, even outclassing sophisticated analytical techniques such as chromatography, conventional spectrophotometry, fluorescence, and capillary electrophoresis. Herein, the literature published on PAHs is reviewed and discussed with special regard to PAH occurrence. Moreover, the recent developments in electrochemical sensors for PAH determination and the challenges and future outlooks in this field, are also presented.
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Affiliation(s)
| | - Shahrul Ainliah Alang Ahmad
- Faculty of Science, Department of Chemistry, Universiti Putra Malaysia, Selangor, Malaysia.,Institute of Advanced Technology, Universiti Putra Malaysia, Selangor, Malaysia
| | | | - Nor Zida Rosly
- Institute of Advanced Technology, Universiti Putra Malaysia, Selangor, Malaysia
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19
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Application of corn zein as an anchoring molecule in a carbon nanotube enhanced electrochemical sensor for the detection of gliadin. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107350] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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20
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Manny TF, Miah R, Islam F, Sen D, Mahmud R. Enhanced Oxidation of Uric Acid at Thiourea-Modified Gold Electrode in Alkaline Media. RUSS J ELECTROCHEM+ 2020. [DOI: 10.1134/s1023193520070046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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21
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Kanyong P, Davis JJ. Homogeneous functional self-assembled monolayers: Faradaic impedance baseline signal drift suppression for high-sensitivity immunosensing of C-reactive protein. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2019.113675] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Felemban S, Vazquez P, Moore E. Future Trends for In Situ Monitoring of Polycyclic Aromatic Hydrocarbons in Water Sources: The Role of Immunosensing Techniques. BIOSENSORS-BASEL 2019; 9:bios9040142. [PMID: 31835623 PMCID: PMC6955691 DOI: 10.3390/bios9040142] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/02/2019] [Accepted: 12/05/2019] [Indexed: 12/18/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are hazardous environmental pollutants found in water, soil, and air. Exposure to this family of chemicals presents a danger to human health, and as a result, it is imperative to design methods that are able to detect PAHs in the environment, thus improving the quality of drinking water and agricultural soils. This review presents emerging immunoassay techniques used for in situ detection of PAH in water samples and how they compare to common-place techniques. It will discuss their advantages and disadvantages and why it is required to find new solutions to analyze water samples. These techniques are effective in reducing detection times and complexity of measurements. Immunoassay methods presented here are able to provide in situ analysis of PAH concentrations in a water sample, which can be a great complement to existing laboratory techniques due to their real-time screening and portability for immunoassay techniques. The discussion shows in detail the most relevant state-of-the-art surface functionalization techniques used in the field of immunosensors, with the aim to improve PAH detection capabilities. Specifically, three surface functionalization techniques are key approaches to improve the detection of PAHs, namely, substrate surface reaction, layer-by-layer technique, and redox-active probes. These techniques have shown promising improvements in the detection of PAHs in water samples, since they show a wider linear range and high level of sensitivity compared to traditional PAH detection techniques. This review explores the various methods used in the detection of PAH in water environments. It provides extra knowledge to scientists on the possible solutions that can be used to save time and resources. The combination of the solutions presented here shows great promise in the development of portable solutions that will be able to analyze a sample in a matter of minutes on the field.
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23
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Makelane H, Waryo T, Feleni U, Iwuoha E. Dendritic copolymer electrode for second harmonic alternating current voltammetric signalling of pyrene in oil-polluted wastewater. Talanta 2019; 196:204-210. [DOI: 10.1016/j.talanta.2018.12.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 12/10/2018] [Accepted: 12/12/2018] [Indexed: 01/25/2023]
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24
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Nootchanat S, Jaikeandee W, Yaiwong P, Lertvachirapaiboon C, Shinbo K, Kato K, Ekgasit S, Baba A. Fabrication of Miniature Surface Plasmon Resonance Sensor Chips by Using Confined Sessile Drop Technique. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11954-11960. [PMID: 30844226 DOI: 10.1021/acsami.9b01617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study, we demonstrate a simple and efficient method to fabricate miniature surface plasmon resonance (SPR) sensor chips by using confined sessile drop technique. A liquid optical adhesive (NOA 61) was dropped on the circular flat surface of cylindrical substrates made of poly(dimethylsiloxane) (PDMS). The formation of hemispherical optical prisms was accomplished by taking advantage of the sharp edges of cylindrical PDMS substrates that prevented the overflow of liquid NOA 61 at the edge of substrates. The size of the hemispherical optical prisms can be controlled by changing the diameter of the cylindrical PDMS substrates. After UV curing, the SPR sensor chips were obtained by the deposition of 3 nm thick chromium and 47 nm thick gold on the flat side of the prisms. The fabricated miniature SPR sensor chips were then mounted on a three-dimensional-printed flow cell to complete the microfluidic SPR sensor module. The miniature SPR sensor chips provided a comparable sensitivity to the conventional high-refractive-index glass SPR chips. To demonstrate the detection capability of nanometer-sized materials, we applied the miniature microfluidic SPR system for monitoring the deposition of layer-by-layer ultrathin films of poly(diallyldimethylammonium chloride)/poly(sodium 4-styrenesulfonate) and for detecting human immunoglobulin G.
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Affiliation(s)
- Supeera Nootchanat
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
| | - Wisansaya Jaikeandee
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
- Sensor Research Unit, Department of Chemistry, Faculty of Science , Chulalongkorn University , Bangkok 10330 , Thailand
| | - Patrawadee Yaiwong
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
- Department of Chemistry, Faculty of Science , Chiang Mai University , Chiang Mai 50200 , Thailand
| | - Chutiparn Lertvachirapaiboon
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
| | - Kazunari Shinbo
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
| | - Keizo Kato
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
| | - Sanong Ekgasit
- Sensor Research Unit, Department of Chemistry, Faculty of Science , Chulalongkorn University , Bangkok 10330 , Thailand
| | - Akira Baba
- Graduate School of Science and Technology , Niigata University , 8050 Ikarashi 2-Nocho , Nishi-ku, Niigata 959-2181 , Japan
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Szymanowska P, Nowak D, Piasecki T. Performance Evaluation of Miniature Integrated Electrochemical Cells Fabricated Using LTCC Technology. SENSORS 2019; 19:s19061314. [PMID: 30884751 PMCID: PMC6471413 DOI: 10.3390/s19061314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 11/28/2022]
Abstract
Miniaturized and integrated analytical devices, including chemical sensors, are at the forefront of modern analytical chemistry. The construction of novel analytical tools takes advantage of contemporary micro- and nanotechnologies, as well as materials science and technology. Two electrochemical techniques were used in experiments: electrochemical impedance spectroscopy and cyclic voltammetry. The goal of this study was to investigate electron transfer resistance in a model solution containing Fe2+/3+ ions and protein adsorption using integrated electrochemical cells with different geometry. Tests performed at various Fe2+/3+ concentration allowed to verify that these cells work properly. The influence of bovine serum albumin adsorbing to the surface of the integrated electrochemical cells was investigated. In electrochemical impedance spectroscopy, the value of Rct increased with protein adsorption and the relative change of Rct was in range 21% to 55%. In cyclic voltammetry the decreasing amperometric response of the working electrode was used as evidence of protein adsorption on the electrode.
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Affiliation(s)
- Paulina Szymanowska
- Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, Z. Janiszewskiego 11/17, 50-372 Wrocław, Poland.
| | - Damian Nowak
- Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, Z. Janiszewskiego 11/17, 50-372 Wrocław, Poland.
| | - Tomasz Piasecki
- Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, Z. Janiszewskiego 11/17, 50-372 Wrocław, Poland.
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26
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Oliveira N, Costa-Rama E, Viswanathan S, Delerue-Matos C, Pereira L, Morais S. Label-free Voltammetric Immunosensor for Prostate Specific Antigen Detection. ELECTROANAL 2018. [DOI: 10.1002/elan.201800417] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Nélia Oliveira
- REQUIMTE/LAQV; Instituto Superior de Engenharia do Porto; Instituto Politécnico do Porto; Rua Dr. António Bernardino de Almedia 431 4200-072 Porto Portugal
| | - Estefanía Costa-Rama
- REQUIMTE/LAQV; Instituto Superior de Engenharia do Porto; Instituto Politécnico do Porto; Rua Dr. António Bernardino de Almedia 431 4200-072 Porto Portugal
| | - Subramanian Viswanathan
- Department of Industrial Chemistry; Alagappa University; Karaikudi- 630003, Tamilnadu, India
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV; Instituto Superior de Engenharia do Porto; Instituto Politécnico do Porto; Rua Dr. António Bernardino de Almedia 431 4200-072 Porto Portugal
| | - Lourdes Pereira
- Department of Medical Sciences; CICECO-Aveiro Institute of Materials; University of Aveiro, Campus Santiago; 3810-193 Aveiro Portugal
| | - Simone Morais
- REQUIMTE/LAQV; Instituto Superior de Engenharia do Porto; Instituto Politécnico do Porto; Rua Dr. António Bernardino de Almedia 431 4200-072 Porto Portugal
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27
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Silambarasan K, Joseph J. Electrochemical Diagnosis of Chemical Switch: Impact of Structural Changes on Charge Transport Mechanism of “Redox Anion Bound Polysilsesquioxane” Film. ChemElectroChem 2018. [DOI: 10.1002/celc.201800799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - James Joseph
- Electrodics and Electrocatalysis division; Central Electrochemical Research Institute; Karaikudi India
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28
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Alizadeh Zeinabad H, Ghourchian H, Falahati M, Fathipour M, Azizi M, Boutorabi SM. Ultrasensitive interdigitated capacitance immunosensor using gold nanoparticles. NANOTECHNOLOGY 2018; 29:265102. [PMID: 29629877 DOI: 10.1088/1361-6528/aabca3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Immunosensors based on interdigitated electrodes (IDEs), have recently demonstrated significant improvements in the sensitivity of capacitance detection. Herein, a novel type of highly sensitive, compact and portable immunosensor based on a gold interdigital capacitor has been designed and developed for the rapid detection of hepatitis B surface antigen (HBsAg). To improve the efficiency of antibody immobilization and time-saving, a self-assembled monolayer (SAM) of 2-mercaptoethylamine film was coated on IDEs. Afterwards, carboxyl groups on primary antibodies were activated through 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and were immobilized on amino-terminated SAM for better control of the oriented immobilization of antibodies on gold IDEs. In addition, gold nanoparticles conjugated with a secondary antibody were used to enhance the sensitivity. Under optimal conditions, the immunosensor exhibited the sensitivity of 0.22 nF.pg ml-1, the linear range from 5 pg ml-1 to 1 ng ml-1 and the detection limit of 1.34 pg ml-1, at a signal-to-noise ratio of 3.
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Affiliation(s)
- Hojjat Alizadeh Zeinabad
- Laboratory of Bioanalysis, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran. MEMS & NEMS Lab, Department of Electrical and Computer Engineering, University of Tehran, Tehran, Iran. Department of Nanotechnology, Faculty of Advance Science and Technology, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
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29
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Fan Z, Li Z, Liu S, Yang F, Bian Z, Wang Y, Tang G, Zhao Q, Deng H, Liu S. Rapid fluorescence immunoassay of benzo[a]pyrene in mainstream cigarette smoke based on a dual-functional antibody–DNA conjugate. RSC Adv 2018; 8:29562-29569. [PMID: 35547323 PMCID: PMC9085264 DOI: 10.1039/c8ra04915g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 08/13/2018] [Indexed: 11/24/2022] Open
Abstract
Benzo[a]pyrene (BaP) is considered as one of the most carcinogenic pollutants in cigarette smoke. The development of simple and sensitive BaP screening methods can help assess the risk of cigarette exposure to the human body rapidly. In this report, a rapid fluorescence immunoassay (RFIA) method for the detection of BaP is proposed, the core of which is the synthesis of bifunctional covalent antibody–DNA conjugates for target recognition and signal amplification. Based on the optimization of the SYBR Green I and PAH–BSA concentrations, as well as DNA–antibody immune complex's dilution in the RFIA system, a serial dilution of BaP was tested with this method. The results showed that the linear working range of the RFIA for BaP is 0.46 to 333 ng mL−1, which is much wider than traditional ELISA. The detection limit was 0.32 ng mL−1, which was more sensitive than other methods such as the redox-labeled electrochemical immunoassay method and the competitive piezoelectric biosensor. Then the cross-reactions (CR) of other PAHs in cigarette smoke were evaluated using this RFIA and found that the cross-reactions of naphthalene, anthracene, and pyrene were very low (<1%). The cross-reaction in this RFIA system can be reduced by improving the specificity of the antibody. To the best of our knowledge, this is the first time that the BaP in mainstream cigarette smoke was tested; the RFIA demonstrates fast and simple experimental manipulations and better working curves and sensitivity. Benzo[a]pyrene (BaP) is considered as one of the most carcinogenic pollutants in cigarette smoke.![]()
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Affiliation(s)
- Ziyan Fan
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Zhonghao Li
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Shanshan Liu
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Fei Yang
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Zhaoyang Bian
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Ying Wang
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Gangling Tang
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Qinxiao Zhao
- School of Basic Medical Science
- Shandong University
- Jinan
- China
| | - Huimin Deng
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
| | - Shili Liu
- China National Tobacco Quality Supervision and Test Center
- Zhengzhou 450001
- China
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30
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Soares J, Iwaki LEO, Soares AC, Rodrigues VC, Melendez ME, Fregnani JHG, Reis RM, Carvalho AL, Corrêa DS, Oliveira ON. Immunosensor for Pancreatic Cancer Based on Electrospun Nanofibers Coated with Carbon Nanotubes or Gold Nanoparticles. ACS OMEGA 2017; 2:6975-6983. [PMID: 30023536 PMCID: PMC6044935 DOI: 10.1021/acsomega.7b01029] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 10/05/2017] [Indexed: 05/15/2023]
Abstract
We report the fabrication of immunosensors based on nanostructured mats of electrospun nanofibers of polyamide 6 and poly(allylamine hydrochloride) coated either with multiwalled carbon nanotubes (MWCNTs) or gold nanoparticles (AuNPs), whose three-dimensional structure was suitable for the immobilization of anti-CA19-9 antibodies to detect the pancreatic cancer biomarker CA19-9. Using impedance spectroscopy, the sensing platform was able to detect CA19-9 with a detection limit of 1.84 and 1.57 U mL-1 for the nanostructured architectures containing MWCNTs and AuNPs, respectively. The high sensitivity achieved can be attributed to the irreversible adsorption between antibodies and antigens, as confirmed with polarization-modulated infrared reflection absorption spectroscopy. The adsorption mechanism was typical Langmuir-Freundlich processes. The high sensitivity and selectivity of the immunosensors were also explored in tests with blood serum from patients with distinct concentrations of CA19-9, for which the impedance spectra data were processed with a multidimensional projection technique. The robustness of the immunosensors in dealing with patient samples without suffering interference from analytes present in biological fluids is promising for a simple, effective diagnosis of pancreatic cancer at early stages.
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Affiliation(s)
- Juliana
C. Soares
- São
Carlos Institute of Physics, University
of São Paulo, 13560-60 São Carlos, Brazil
| | - Leonardo E. O. Iwaki
- São
Carlos Institute of Physics, University
of São Paulo, 13560-60 São Carlos, Brazil
- Department
of Materials Engineering, São Carlos School of Engineering, University of São Paulo, 13563-120 São Carlos, Brazil
| | - Andrey C. Soares
- São
Carlos Institute of Physics, University
of São Paulo, 13560-60 São Carlos, Brazil
- Department
of Materials Engineering, São Carlos School of Engineering, University of São Paulo, 13563-120 São Carlos, Brazil
| | | | - Matias E. Melendez
- Molecular
Oncology Research Center, Barretos Cancer
Hospital, 14784-400 Barretos, Brazil
| | | | - Rui M. Reis
- Molecular
Oncology Research Center, Barretos Cancer
Hospital, 14784-400 Barretos, Brazil
- ICVS/3B’s-PT
Government Associate Laboratory, Life and Health Sciences Research
Institute (ICVS), University of Minho, 4710-057 Braga, Portugal
| | - Andre L. Carvalho
- Molecular
Oncology Research Center, Barretos Cancer
Hospital, 14784-400 Barretos, Brazil
| | - Daniel S. Corrêa
- Nanotechnology
National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, 13560-970 São Carlos, Brazil
| | - Osvaldo N. Oliveira
- São
Carlos Institute of Physics, University
of São Paulo, 13560-60 São Carlos, Brazil
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31
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Muñoz J, Crivillers N, Mas-Torrent M. Carbon-Rich Monolayers on ITO as Highly Sensitive Platforms for Detecting Polycyclic Aromatic Hydrocarbons in Water: The Case of Pyrene. Chemistry 2017; 23:15289-15293. [DOI: 10.1002/chem.201703264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Jose Muñoz
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); and CIBER-BBN; Campus de la UAB 08193 Bellaterra (Cerdanyola del Vallès) Spain
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); and CIBER-BBN; Campus de la UAB 08193 Bellaterra (Cerdanyola del Vallès) Spain
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); and CIBER-BBN; Campus de la UAB 08193 Bellaterra (Cerdanyola del Vallès) Spain
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32
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Qiao B, Li Y, Meng X, Sun Y, Hu P, Lu S, Ren H, Liu Z, Zhou Y. Development of an indirect competitive ELISA for the detection of acenaphthene and pyrene. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1313201] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Bin Qiao
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
| | - Yansong Li
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
| | - Xingyu Meng
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, People’s Republic of China
| | - Yu Sun
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
- Grain and Oil Food Processing Key Laboratory of Jilin Province, Jilin Business and Technology College, Changchun, People’s Republic of China
| | - Pan Hu
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
| | - Shiying Lu
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
| | - Honglin Ren
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
| | - Zengshan Liu
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
| | - Yu Zhou
- Key Laboratory of Zoonoses, Ministry of Education, Institute of Zoonoses/College of Veterinary Medicine, The First Hospital of Jilin University, Jilin University, Changchun, People’s Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, People’s Republic of China
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33
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Duffy GF, Moore EJ. Electrochemical Immunosensors for Food Analysis: A Review of Recent Developments. ANAL LETT 2016. [DOI: 10.1080/00032719.2016.1167900] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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34
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Development of an Indirect Competitive ELISA Kit for the Rapid Detection of Benzopyrene Residues. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0239-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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A regenerating ultrasensitive electrochemical impedance immunosensor for the detection of adenovirus. Biosens Bioelectron 2015; 68:129-134. [DOI: 10.1016/j.bios.2014.12.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 11/28/2014] [Accepted: 12/15/2014] [Indexed: 12/27/2022]
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36
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Electrochemical detection of benzo(a)pyrene in acetonitrile-water binary medium. Talanta 2015; 138:46-51. [PMID: 25863370 DOI: 10.1016/j.talanta.2015.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/28/2015] [Accepted: 02/01/2015] [Indexed: 11/23/2022]
Abstract
Electrochemical oxidation of adsorbed benzo(a)pyrene (BaP) on the glassy carbon electrode (GCE) was explored in acetonitrile-water. When the GCE was incubated in 100 nM BaP acetonitrile-water (V(water):V(acetonitrile)=1:1) for 10 min at open circuit, and then transferred into blank acetonitrile-water (V(water):V(acetonitrile)=1:1, pH= 0.70) for differential pulse voltammetry measurement, a distinct oxidation peak at 0.98 V (vs. Ag/AgCl) was observed. The peak potential was about 180 mV lower than that in acetonitrile. Importantly, the peak current was more than 22 times greater. The effects of water on BaP preconcentration on the electrode and electrochemical oxidation were revealed, respectively. Based on the results, an electrochemical assay for BaP detection was developed. The GCE was respectively incubated in acetonitrile-water (V(water):V(acetonitrile)=1:1)with BaP concentration ranged from 0 nM to 1000 nM, and then transferred into the corresponding blank acetonitrile-water (pH= 0.70) for DPV measurements. When the BaP concentration was increased, an increased oxidative current at 0.98 V (vs. Ag/AgCl) was observed, and a detection limit of 0.67 nM was achieved. Because all other priority polycyclic aromatic hydrocarbons could not be electrochemically oxidized at 0.98 V, the electrochemical assay showed very high selectivity to BaP. Finally, the developed electrochemical assay was successfully applied to determination of BaP in a series of real world samples, such as drinking water, tap water, lake water and river water.
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37
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Bach P, Stratmann M, Valencia-Jaime I, Romero A, Renner F. Lithiation and Delithiation Mechanisms of Gold Thin Film Model Anodes for Lithium Ion Batteries: Electrochemical Characterization. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.02.184] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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38
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Liu S, Wei M, Zheng X, Xu S, Xia F, Zhou C. Alizarin red S functionalized mesoporous silica modified glassy carbon electrode for electrochemical determination of anthracene. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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39
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Wang C, Yu C. Analytical characterization using surface-enhanced Raman scattering (SERS) and microfluidic sampling. NANOTECHNOLOGY 2015; 26:092001. [PMID: 25676092 DOI: 10.1088/0957-4484/26/9/092001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
With the rapid development of analytical techniques, it has become much easier to detect chemical and biological analytes, even at very low detection limits. In recent years, techniques based on vibrational spectroscopy, such as surface enhanced Raman spectroscopy (SERS), have been developed for non-destructive detection of pathogenic microorganisms. SERS is a highly sensitive analytical tool that can be used to characterize chemical and biological analytes interacting with SERS-active substrates. However, it has always been a challenge to obtain consistent and reproducible SERS spectroscopic results at complicated experimental conditions. Microfluidics, a tool for highly precise manipulation of small volume liquid samples, can be used to overcome the major drawbacks of SERS-based techniques. High reproducibility of SERS measurement could be obtained in continuous flow generated inside microfluidic devices. This article provides a thorough review of the principles, concepts and methods of SERS-microfluidic platforms, and the applications of such platforms in trace analysis of chemical and biological analytes.
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40
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Garcia-Mutio D, Guerreiro A, Gomez-Caballero A, Gutierrez-Climente R, Piletsky S, Goicolea M, Barrio R. Molecularly Imprinted High Affinity Nanoparticles for 4-Ethylphenol Sensing. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proeng.2015.08.821] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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41
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Wei M, Duan S, Liu S, Zheng X, Xia F, Zhou C. Electrochemical determination of phenanthrene based on anthraquinone sulfonate and poly diallyldimethylammonium chloride modified indium–tin oxide electrode. RSC Adv 2015. [DOI: 10.1039/c5ra02803e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The amount of Phe could be quantified by the electrochemical oxidation peak current difference of AQS at AQS/PDDA/ITO through the specific interaction between AQS and Phe.
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Affiliation(s)
- Maochao Wei
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- Jinan 250022
- China
| | - Shuo Duan
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
| | - Shan Liu
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- Jinan 250022
- China
| | - Xiangli Zheng
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- Jinan 250022
- China
| | - Fangquan Xia
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- Jinan 250022
- China
| | - Changli Zhou
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- Jinan 250022
- China
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42
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Gopinath SC, Tang TH, Citartan M, Chen Y, Lakshmipriya T. Current aspects in immunosensors. Biosens Bioelectron 2014; 57:292-302. [DOI: 10.1016/j.bios.2014.02.029] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/11/2014] [Accepted: 02/11/2014] [Indexed: 02/08/2023]
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43
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Liu S, Wei M, Zheng X, Xu S, Zhou C. Highly sensitive and selective sensing platform based on π–π interaction between tricyclic aromatic hydrocarbons with thionine–graphene composite. Anal Chim Acta 2014; 826:21-7. [DOI: 10.1016/j.aca.2014.04.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 04/03/2014] [Accepted: 04/05/2014] [Indexed: 12/18/2022]
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44
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Hackl C, Beyreiss R, Geissler D, Jezierski S, Belder D. Rapid prototyping of electrochromatography chips for improved two-photon excited fluorescence detection. Anal Chem 2014; 86:3773-9. [PMID: 24666258 DOI: 10.1021/ac500793e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present study, we introduce two-photon excitation at 532 nm for label-free fluorescence detection in chip electrochromatography. Two-photon excitation at 532 nm offers a promising alternative to one-photon excitation at 266 nm, as it enables the use of economic chip materials instead of fused silica. In order to demonstrate these benefits, one-photon and two-photon induced fluorescence detection are compared in different chip layouts and materials with respect to the achievable sensitivity in the detection of polycyclic aromatic hydrocarbons (PAHs). Customized chromatography chips with cover or bottom slides of different material and thickness are produced by means of a rapid prototyping method based on liquid-phase lithography. The design of thin bottom chips (180 μm) enables the use of high-performance immersion objectives with low working distances, which allows one to exploit the full potential of two-photon excitation for a sensitive detection. The developed method is applied for label-free analysis of PAHs separated on a polymer monolith inside polymer glass sandwich chips made from fused silica or soda-lime glass. The obtained limits of detection range from 40 nM to 1.95 μM, with similar sensitivities in fused silica thin bottom chips for one-photon and two-photon excitation. In deep-UV non- or less-transparent devices two-photon excitation is mandatory for label-free detection of aromatics with high sensitivity.
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Affiliation(s)
- Claudia Hackl
- Institut für Analytische Chemie, Universität Leipzig , Linnéstraße 3, 04103 Leipzig, Germany
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45
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Wang Y, Wei Q, Zhang Y, Wu D, Ma H, Guo A, Du B. A sandwich-type immunosensor using Pd-Pt nanocrystals as labels for sensitive detection of human tissue polypeptide antigen. NANOTECHNOLOGY 2014; 25:055102. [PMID: 24406637 DOI: 10.1088/0957-4484/25/5/055102] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A sandwich-type immunosensor was developed for the detection of human tissue polypeptide antigen (hTPA). In this work, a graphene sheet (GS) was synthesized to modify the surface of a glassy carbon electrode (GCE), and Pd-Pt bimetallic nanocrystals were used as secondary-antibody (Ab2) labels for the fabrication of the immunosensor. The amperometric response of the immunosensor for catalyzing hydrogen peroxide (H2O2) was recorded. And electrochemical impedance spectroscopy was used to characterize the fabrication process of the immunosensor. The anti-human tissue polypeptide antigen primary antibody (Ab1) was immobilized onto the GS modified GCE via cross-linking with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxysuccinimide (EDC/NHS). With Ab1 immobilized onto the GS modified GCE and Ab2 linked on Pd-Pt bimetallic nanocrystals, the immunosensor demonstrated a wide linear range (0.0050-15 ng ml(-1)), a low detection limit (1.2 pg ml(-1)), good reproducibility, good selectivity and acceptable stability. This design strategy may provide many potential applications in the detection of other cancer biomarkers.
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Affiliation(s)
- Yaoguang Wang
- Key Laboratory of Chemical Sensing and Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, People's Republic of China
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46
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Cho E, Ahn M, Kim YH, Kim J, Kim S. Protons are one of the limiting factors in determining sensitivity of nano surface-assisted (+)-mode LDI MS analyses. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1489-1492. [PMID: 23955002 DOI: 10.1007/s13361-013-0713-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/01/2013] [Accepted: 07/12/2013] [Indexed: 06/02/2023]
Abstract
A proton source employing a nanostructured gold surface for use in (+)-mode laser desorption ionization mass spectrometry (LDI-MS) was evaluated. Analysis of perdeuterated polyaromatic hydrocarbon compound dissolved in regular toluene, perdeuterated toluene, and deuterated methanol all showed that protonated ions were generated irregardless of solvent system. Therefore, it was concluded that residual water on the surface of the LDI plate was the major source of protons. The fact that residual water remaining after vacuum drying was the source of protons suggests that protons may be the limiting reagent in the LDI process and that overall ionization efficiency can be improved by incorporating an additional proton source. When extra proton sources, such as thiolate compounds and/or citric acid, were added to a nanostructured gold surface, the protonated signal abundance increased. These data show that protons are one of the limiting components in (+)-mode LDI MS analyses employing nanostructured gold surfaces. Therefore, it has been suggested that additional efforts are required to identify compounds that can act as proton donors without generating peaks that interfere with mass spectral interpretation.
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Affiliation(s)
- Eunji Cho
- Department of Chemistry, Kyungpook National University, Daegu, 702-701, Republic of Korea
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47
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Development of electrochemical immunosensors towards point of care diagnostics. Biosens Bioelectron 2013; 47:1-11. [DOI: 10.1016/j.bios.2013.02.045] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/27/2013] [Accepted: 02/28/2013] [Indexed: 12/21/2022]
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48
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Metal complex oligomer and polymer wires on electrodes: Tactical constructions and versatile functionalities. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.04.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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49
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Flow electrochemical biosensors based on enzymatic porous reactor and tubular detector of silver solid amalgam. Anal Chim Acta 2013; 778:24-30. [DOI: 10.1016/j.aca.2013.03.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 03/18/2013] [Accepted: 03/21/2013] [Indexed: 11/24/2022]
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