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Miranda Mugica M, McGuinness KL, Lawrence NS. Electropolymerised pH Insensitive Salicylic Acid Reference Systems: Utilization in a Novel pH Sensor for Food and Environmental Monitoring. SENSORS (BASEL, SWITZERLAND) 2022; 22:555. [PMID: 35062515 PMCID: PMC8777722 DOI: 10.3390/s22020555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/31/2021] [Accepted: 01/08/2022] [Indexed: 06/14/2023]
Abstract
This work summarizes the electrochemical response of a salicylic acid-based carbon electrode for use as a novel solid-state reference electrode in a redox-based pH sensor. This novel reference produces a pH insensitive response over a range of pH 3-10 in solutions with low buffer concentrations, different compositions, conductivities, and ionic strengths is produced. The pH of the local environment is shown to be determined by the chemistry and the electrochemical response of the redox active species on the surface of the electrode; the local pH can be controlled by the electropolymerized salicylic acid moieties due to the acid concentration on the surface, avoiding any perturbation in environmental pH and leading to a stable novel reference system. Sensitivities of -7.1 mV/pH unit, -2.4 mV/pH unit, -0.2 mV/pH unit, and 2.5 mV/pH units were obtained for different food medias, hydroponic solution, seawater, and cell-culture media, respectively, confirming its ability to control the local pH of the electrode. This reference system is paired with a new pH sensing element based on electropolymerized flavanone to provide a calibration free, pH sensitive sensor to effectively and accurately measure the pH of various media with high viscosity, low conductivity, low/high buffer concentration or cell-culture environment, presenting a maximum error of +/-0.03 pH units.
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2
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Srinivas S, Ashokkumar K, Sriraghavan K, Senthil Kumar A. A prototype device of microliter volume voltammetric pH sensor based on carbazole-quinone redox-probe tethered MWCNT modified three-in-one screen-printed electrode. Sci Rep 2021; 11:13905. [PMID: 34230547 PMCID: PMC8260652 DOI: 10.1038/s41598-021-93368-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 06/14/2021] [Indexed: 11/30/2022] Open
Abstract
As an alternate for the conventional glass-based pH sensor which is associated with problems like fragile nature, alkaline error, and potential drift, the development of a new redox-sensitive pH probe-modified electrode that could show potential, current-drift and surface-fouling free voltammetric pH sensing is a demanding research interest, recently. Herein, we report a substituted carbazole-quinone (Car-HQ) based new redox-active pH-sensitive probe that contains benzyl and bromo-substituents, immobilized multiwalled carbon nanotube modified glassy carbon (GCE/MWCNT@Car-HQ) and screen-printed three-in-one (SPE/MWCNT@Car-HQ) electrodes for selective, surface-fouling free pH sensor application. This new system showed a well-defined surface-confined redox peak at an apparent standard electrode potential, Eo' = - 0.160 V versus Ag/AgCl with surface-excess value, Γ = 47 n mol cm-2 in pH 7 phosphate buffer solution. When tested with various electroactive chemicals and biochemicals such as cysteine, hydrazine, NADH, uric acid, and ascorbic acid, MWCNT@Car-HQ showed an unaltered redox-peak potential and current values without mediated oxidation/reduction behavior unlike the conventional hydroquinone, anthraquinone and other redox mediators based voltammetry sensors with serious electrocatalytic effects and in turn potential and current drifts. A strong π-π interaction, nitrogen-atom assisted surface orientation and C-C bond formation on the graphitic structure of MWCNT are the plausible reasons for stable and selective voltammetric pH sensing application of MWCNT@Car-HQ system. Using a programed/in-built three-in-one screen printed compatible potentiostat system, voltammetric pH sensing of 3 μL sample of urine, saliva, and orange juice samples with pH values comparable to that of milliliter volume-based pH-glass electrode measurements has been demonstrated.
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Affiliation(s)
- Sakthivel Srinivas
- Nano and Bioelectrochemistry Research Laboratory, Carbon Dioxide Research and Green Technology Centre, Vellore Institute of Technology, Vellore, 632 014, India
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632 014, India
| | - Krishnan Ashokkumar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632 014, India
| | - Kamaraj Sriraghavan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632 014, India.
| | - Annamalai Senthil Kumar
- Nano and Bioelectrochemistry Research Laboratory, Carbon Dioxide Research and Green Technology Centre, Vellore Institute of Technology, Vellore, 632 014, India.
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632 014, India.
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3
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Sisodia N, Miranda M, McGuinness KL, Wadhawan JD, Lawrence NS. Intra‐ and Inter‐molecular Sulf‐ hydryl Hydrogen Bonding: Facilitating Proton Transfer Events for Determination of pH in Sea Water. ELECTROANAL 2020. [DOI: 10.1002/elan.202060332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Neel Sisodia
- ANB Sensors Ltd. 4 Penn Farm Haslingfield Cambridge CB23 1JZ United Kingdom
| | - Monica Miranda
- ANB Sensors Ltd. 4 Penn Farm Haslingfield Cambridge CB23 1JZ United Kingdom
| | - Kay L. McGuinness
- ANB Sensors Ltd. 4 Penn Farm Haslingfield Cambridge CB23 1JZ United Kingdom
| | - Jay D. Wadhawan
- Department of Chemical Engineering The University of Hull Cottingham Road Hull HU6 7RX United Kingdom
| | - Nathan S. Lawrence
- ANB Sensors Ltd. 4 Penn Farm Haslingfield Cambridge CB23 1JZ United Kingdom
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4
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McBeth C, Dughaishi RA, Paterson A, Sharp D. Ubiquinone modified printed carbon electrodes for cell culture pH monitoring. Biosens Bioelectron 2018; 113:46-51. [PMID: 29727751 DOI: 10.1016/j.bios.2018.04.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/06/2018] [Accepted: 04/24/2018] [Indexed: 11/30/2022]
Abstract
The measurement of pH is important throughout many biological systems, but there are limited available technologies to enable its periodical monitoring in the complex, small volume, media often used in cell culture experiments across a range of disciplines. Herein, pad printed electrodes are developed and characterised through modification with: a commercially available fullerene multiwall carbon nanotube composite applied in Nafion, casting of hydrophobic ubiquinone as a pH probe to provide the electrochemical signal, and coated in Polyethylene glycol to reduce fouling and potentially enhance biocompatibility, which together are proven to enable the determination of pH in cell culture media containing serum. The ubiquinone oxidation peak position (Epa) provided an indirect marker of pH across the applicable range of pH 6-9 (R2 = 0.9985, n = 15) in complete DMEM. The electrochemical behaviour of these sensors was also proven to be robust; retaining their ability to measure pH in cell culture media supplemented with serum up to 20% (v/v) [encompassing the range commonly employed in cell culture], cycled > 100 times in 10% serum containing media and maintain > 60% functionality after 5 day incubation in a 10% serum containing medium. Overall, this proof of concept research highlights the potential applicability of this, or similar, electrochemical approaches to enable to detection or monitoring of pH in complex cell culture media.
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Affiliation(s)
- Craig McBeth
- Centre for Biomedical Science Research, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds LS1 3HE, United Kingdom
| | - Rajaa Al Dughaishi
- Centre for Biomedical Science Research, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds LS1 3HE, United Kingdom
| | - Andrew Paterson
- Centre for Biomedical Science Research, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds LS1 3HE, United Kingdom
| | - Duncan Sharp
- Centre for Biomedical Science Research, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds LS1 3HE, United Kingdom.
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5
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Hernandez-Vargas G, Sosa-Hernández JE, Saldarriaga-Hernandez S, Villalba-Rodríguez AM, Parra-Saldivar R, Iqbal HMN. Electrochemical Biosensors: A Solution to Pollution Detection with Reference to Environmental Contaminants. BIOSENSORS 2018; 8:E29. [PMID: 29587374 PMCID: PMC6023016 DOI: 10.3390/bios8020029] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/22/2018] [Accepted: 03/23/2018] [Indexed: 02/05/2023]
Abstract
The increasing environmental pollution with particular reference to emerging contaminants, toxic heavy elements, and other hazardous agents is a serious concern worldwide. Considering this global issue, there is an urgent need to design and develop strategic measuring techniques with higher efficacy and precision to detect a broader spectrum of numerous contaminants. The development of precise instruments can further help in real-time and in-process monitoring of the generation and release of environmental pollutants from different industrial sectors. Moreover, real-time monitoring can also reduce the excessive consumption of several harsh chemicals and reagents with an added advantage of on-site determination of contaminant composition prior to discharge into the environment. With key scientific advances, electrochemical biosensors have gained considerable attention to solve this problem. Electrochemical biosensors can be an excellent fit as an analytical tool for monitoring programs to implement legislation. Herein, we reviewed the current trends in the use of electrochemical biosensors as novel tools to detect various contaminant types including toxic heavy elements. A particular emphasis was given to screen-printed electrodes, nanowire sensors, and paper-based biosensors and their role in the pollution detection processes. Towards the end, the work is wrapped up with concluding remarks and future perspectives. In summary, electrochemical biosensors and related areas such as bioelectronics, and (bio)-nanotechnology seem to be growing areas that will have a marked influence on the development of new bio-sensing strategies in future studies.
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Affiliation(s)
- Gustavo Hernandez-Vargas
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, CP 64849, Monterrey, N.L., Mexico.
| | - Juan Eduardo Sosa-Hernández
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, CP 64849, Monterrey, N.L., Mexico.
| | - Sara Saldarriaga-Hernandez
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, CP 64849, Monterrey, N.L., Mexico.
- Exact and Natural Sciences, Institute of Biology, University of Antioquia, St. 67 No. 53-108, Medellín 050021, Colombia.
| | - Angel M Villalba-Rodríguez
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, CP 64849, Monterrey, N.L., Mexico.
| | - Roberto Parra-Saldivar
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, CP 64849, Monterrey, N.L., Mexico.
- Microsystems Technologies Laboratories, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA.
- Harvard-MIT Division of Health Sciences and Technology, MIT, Cambridge, MA 02139, USA.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Campus Monterrey, Ave. Eugenio Garza Sada 2501, CP 64849, Monterrey, N.L., Mexico.
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Munteanu FD, Titoiu AM, Marty JL, Vasilescu A. Detection of Antibiotics and Evaluation of Antibacterial Activity with Screen-Printed Electrodes. SENSORS 2018; 18:s18030901. [PMID: 29562637 PMCID: PMC5877114 DOI: 10.3390/s18030901] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/12/2018] [Accepted: 03/15/2018] [Indexed: 12/19/2022]
Abstract
This review provides a brief overview of the fabrication and properties of screen-printed electrodes and details the different opportunities to apply them for the detection of antibiotics, detection of bacteria and antibiotic susceptibility. Among the alternative approaches to costly chromatographic or ELISA methods for antibiotics detection and to lengthy culture methods for bacteria detection, electrochemical biosensors based on screen-printed electrodes present some distinctive advantages. Chemical and (bio)sensors for the detection of antibiotics and assays coupling detection with screen-printed electrodes with immunomagnetic separation are described. With regards to detection of bacteria, the emphasis is placed on applications targeting viable bacterial cells. While the electrochemical sensors and biosensors face many challenges before replacing standard analysis methods, the potential of screen-printed electrodes is increasingly exploited and more applications are anticipated to advance towards commercial analytical tools.
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Affiliation(s)
- Florentina-Daniela Munteanu
- Faculty of Food Engineering, Tourism and Environmental Protection, "Aurel Vlaicu" University of Arad, Elena Dragoi, No. 2, Arad 310330, Romania.
| | - Ana Maria Titoiu
- International Centre of Biodynamics, 1B Intrarea Portocalelor, Bucharest 060101, Romania.
| | - Jean-Louis Marty
- BAE Laboratory, Université de Perpignan via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan, France.
| | - Alina Vasilescu
- International Centre of Biodynamics, 1B Intrarea Portocalelor, Bucharest 060101, Romania.
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Daoudi J, Betelu S, Tzedakis T, Bertrand J, Ignatiadis I. A Multi-Parametric Device with Innovative Solid Electrodes for Long-Term Monitoring of pH, Redox-Potential and Conductivity in a Nuclear Waste Repository. SENSORS (BASEL, SWITZERLAND) 2017; 17:E1372. [PMID: 28608820 PMCID: PMC5492355 DOI: 10.3390/s17061372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/19/2017] [Accepted: 06/02/2017] [Indexed: 11/16/2022]
Abstract
We present an innovative electrochemical probe for the monitoring of pH, redox potential and conductivity in near-field rocks of deep geological radioactive waste repositories. The probe is composed of a monocrystalline antimony electrode for pH sensing, four AgCl/Ag-based reference or Cl- selective electrodes, one Ag₂S/Ag-based reference or S2- selective electrode, as well as four platinum electrodes, a gold electrode and a glassy-carbon electrode for redox potential measurements. Galvanostatic electrochemistry impedance spectroscopy using AgCl/Ag-based and platinum electrodes measure conductivity. The use of such a multi-parameter probe provides redundant information, based as it is on the simultaneous behaviour under identical conditions of different electrodes of the same material, as well as on that of electrodes made of different materials. This identifies the changes in physical and chemical parameters in a solution, as well as the redox reactions controlling the measured potential, both in the solution and/or at the electrode/solution interface. Understanding the electrochemical behaviour of selected materials thus is a key point of our research, as provides the basis for constructing the abacuses needed for developing robust and reliable field sensors.
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Affiliation(s)
- Jordan Daoudi
- Water, Environment and Eco-technologies, BRGM French Geological Survey, 45060 Orléans, France.
| | - Stephanie Betelu
- Water, Environment and Eco-technologies, BRGM French Geological Survey, 45060 Orléans, France.
| | - Theodore Tzedakis
- Laboratory of Chemical Engineering, Université de Toulouse III Paul Sabatier, 31062 Toulouse, France.
| | - Johan Bertrand
- Monitoring and Data Processing Department (DRD/MTD), ANDRA French National Radioactive Waste Management Agency, 92290 Châtenay Malabry, France.
| | - Ioannis Ignatiadis
- Water, Environment and Eco-technologies, BRGM French Geological Survey, 45060 Orléans, France.
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8
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9
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Galdino FE, Smith JP, Kwamou SI, Kampouris DK, Iniesta J, Smith GC, Bonacin JA, Banks CE. Graphite Screen-Printed Electrodes Applied for the Accurate and Reagentless Sensing of pH. Anal Chem 2015; 87:11666-72. [PMID: 26561992 DOI: 10.1021/acs.analchem.5b01236] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A reagentless pH sensor based upon disposable and economical graphite screen-printed electrodes (GSPEs) is demonstrated for the first time. The voltammetric pH sensor utilizes GSPEs which are chemically pretreated to form surface immobilized oxygenated species that, when their redox behavior is monitored, give a Nernstian response over a large pH range (1-13). An excellent experimental correlation is observed between the voltammetric potential and pH over the entire pH range of 1-13 providing a simple approach with which to monitor solution pH. Such a linear response over this dynamic pH range is not usually expected but rather deviation from linearity is encountered at alkaline pH values; absence of this has previously been attributed to a change in the pKa value of surface immobilized groups from that of solution phase species. This non-deviation, which is observed here in the case of our facile produced reagentless pH sensor and also reported in the literature for pH sensitive compounds immobilized upon carbon electrodes/surfaces, where a linear response is observed over the entire pH range, is explained alternatively for the first time. The performance of the GSPE pH sensor is also directly compared with a glass pH probe and applied to the measurement of pH in "real" unbuffered samples where an excellent correlation between the two protocols is observed validating the proposed GSPE pH sensor.
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Affiliation(s)
- Flávia E Galdino
- Institute of Chemistry, University of Campinas-UNICAMP , P.O. Box 6154, 13083-970, Campinas, São Paulo Brazil.,Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University , Chester Street, Manchester M1 5GD, U.K
| | - Jamie P Smith
- Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University , Chester Street, Manchester M1 5GD, U.K
| | - Sophie I Kwamou
- Université Paris-Est Créteil-Val de Marne , Faculté des Sciences et Technologie, 61 Avenue du Général de Gaulle, 94010 Créteil Cedex France
| | - Dimitrios K Kampouris
- Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University , Chester Street, Manchester M1 5GD, U.K
| | - Jesus Iniesta
- Physical Chemistry Department and Institute of Electrochemistry, University of Alicante ,03690, San Vicente del Raspeig, Alicante Spain
| | - Graham C Smith
- Faculty of Science and Engineering, Department of Natural Sciences, University of Chester Thornton Science Park, Pool Lane, Ince, Chester CH2 4NU, U.K
| | - Juliano A Bonacin
- Institute of Chemistry, University of Campinas-UNICAMP , P.O. Box 6154, 13083-970, Campinas, São Paulo Brazil
| | - Craig E Banks
- Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University , Chester Street, Manchester M1 5GD, U.K
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Dai C, Song P, Wadhawan JD, Fisher AC, Lawrence NS. Screen Printed Alizarin-Based Carbon Electrodes: Monitoring pH in Unbuffered Media. ELECTROANAL 2015. [DOI: 10.1002/elan.201400704] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Dai C, Crawford LP, Song P, Fisher AC, Lawrence NS. A novel sensor based on electropolymerized substituted-phenols for pH detection in unbuffered systems. RSC Adv 2015. [DOI: 10.1039/c5ra22595g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymeric waves associated with the electrochemical oxidation of salicylaldehyde and its derivatives exhibit Nernstian responses to pH variations in both buffered and unbuffered media.
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Affiliation(s)
- Chencheng Dai
- Schlumberger Gould Research Center
- Cambridge CB3 0 EL
- UK
- Department of Chemical Engineering and Biotechnology
- Cambridge
| | | | - Peng Song
- Schlumberger Gould Research Center
- Cambridge CB3 0 EL
- UK
- Department of Chemical Engineering and Biotechnology
- Cambridge
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12
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Qin Y, Kwon HJ, Howlader MMR, Deen MJ. Microfabricated electrochemical pH and free chlorine sensors for water quality monitoring: recent advances and research challenges. RSC Adv 2015. [DOI: 10.1039/c5ra11291e] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Recent advances of micro-electrochemical ph and free chlorine sensors are reviewed and their technological challenges and perspectives are provided.
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Affiliation(s)
- Yiheng Qin
- Department of Electrical and Computer Engineering
- McMaster University
- Hamilton
- Canada
| | - Hyuck-Jin Kwon
- Department of Electrical and Computer Engineering
- McMaster University
- Hamilton
- Canada
| | | | - M. Jamal Deen
- Department of Electrical and Computer Engineering
- McMaster University
- Hamilton
- Canada
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Abstract
Chronic nonhealing wounds are a major source of morbidity and mortality in bed-ridden and diabetic patients. Monitoring of physical and chemical parameters important in wound healing and remodeling process can be of immense benefit for optimum management of such lesions. Low-cost flexible polymeric and paper-based substrates are attractive platforms for fabrication of such sensors. In this review, we discuss recent advances in flexible physiochemical sensors for chronic wound monitoring. After a brief introduction to wound healing process and commercial wound dressings, we describe various flexible biocompatible substrates that can be used as the base platform for integration of wound monitoring sensors. We will then discuss several fabrication methods that can be utilized to integrate physical and chemical sensors onto such substrates. Finally, we will present physical and chemical sensors developed for monitoring wound microenvironment and outline future development venues.
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Hayat A, Marty JL. Disposable screen printed electrochemical sensors: tools for environmental monitoring. SENSORS (BASEL, SWITZERLAND) 2014; 14:10432-53. [PMID: 24932865 PMCID: PMC4118360 DOI: 10.3390/s140610432] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 06/03/2014] [Accepted: 06/05/2014] [Indexed: 12/04/2022]
Abstract
Screen printing technology is a widely used technique for the fabrication of electrochemical sensors. This methodology is likely to underpin the progressive drive towards miniaturized, sensitive and portable devices, and has already established its route from "lab-to-market" for a plethora of sensors. The application of these sensors for analysis of environmental samples has been the major focus of research in this field. As a consequence, this work will focus on recent important advances in the design and fabrication of disposable screen printed sensors for the electrochemical detection of environmental contaminants. Special emphasis is given on sensor fabrication methodology, operating details and performance characteristics for environmental applications.
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Affiliation(s)
- Akhtar Hayat
- Images, Universite´De Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan Cedex 66860, France.
| | - Jean Louis Marty
- Images, Universite´De Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan Cedex 66860, France.
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15
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Zhang F, Wu J, Wang R, Wang L, Ying Y. Portable pH-inspired electrochemical detection of DNA amplification. Chem Commun (Camb) 2014; 50:8416-9. [DOI: 10.1039/c4cc03011g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Li M, Phair J, Cardosi MF, Davis J. Nanostructuring carbon fibre probes for use in central venous catheters. Anal Chim Acta 2013; 812:1-5. [PMID: 24491756 DOI: 10.1016/j.aca.2013.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 10/20/2013] [Accepted: 11/07/2013] [Indexed: 11/18/2022]
Abstract
A carbon fibre probe is described which utilises the oxidation of an endogenous biomarker to provide diagnostic information on the condition of intravascular access lines. The probe surface was modified through anodic oxidation to provide a high selectivity towards urate which was used as a redox probe through which the pH could be determined. A Nernstian response (-60 mV/pH) was obtained which was free from the interference of other redox species common to biofluids. The electroanalytical performance of the probe has been optimised and the applicability of the approach demonstrated through testing the responses in whole blood.
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Affiliation(s)
- Meixian Li
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jolene Phair
- School of Engineering, University of Ulster, Jordanstown, Northern Ireland BT37 0QB, UK
| | - Marco F Cardosi
- Lifescan Scotland Ltd, Beechwood Park North, Inverness IV2 3ED, UK
| | - James Davis
- School of Engineering, University of Ulster, Jordanstown, Northern Ireland BT37 0QB, UK.
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Davis J, Molina MT, Leach CP, Cardosi MF. Plasma-polyplumbagin-modified microfiber probes: a functional material approach to monitoring vascular access line contamination. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9367-9371. [PMID: 24045102 DOI: 10.1021/am402821c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Atmospheric plasma treated carbon fiber filaments (10 micrometer) were used as the base substrate in the design of a probe intended for use within intravascular access devices. The microfiber probe was further functionalized with a polyplumbagin layer through which the line pH could be determined voltammetrically and therein provide the potential for obtaining diagnostic information relating to bacterial colonization of the line. The redox processes attributed to the immobilized polymer are characterized and a methodology developed to enable the acquisition of a redox signal that is selective and sensitive to pH. The applicability of the composite probe was demonstrated through examining the direct response in whole blood.
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Affiliation(s)
- James Davis
- School of Engineering, University of Ulster , Jordanstown, Northern Ireland BT37 0QB, United Kingdom
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Musa AE, Alonso-Lomillo MA, del Campo FJ, Abramova N, Domínguez-Renedo O, Arcos-Martínez MJ, Kutter JP. Thick-film voltammetric pH-sensors with internal indicator and reference species. Talanta 2012; 99:737-43. [DOI: 10.1016/j.talanta.2012.07.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 06/25/2012] [Accepted: 07/05/2012] [Indexed: 10/28/2022]
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19
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Recent developments and applications of screen-printed electrodes in environmental assays—A review. Anal Chim Acta 2012; 734:31-44. [DOI: 10.1016/j.aca.2012.05.018] [Citation(s) in RCA: 365] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/04/2012] [Accepted: 05/12/2012] [Indexed: 11/21/2022]
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20
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Song W, Li DW, Li YT, Li Y, Long YT. Disposable biosensor based on graphene oxide conjugated with tyrosinase assembled gold nanoparticles. Biosens Bioelectron 2011; 26:3181-6. [DOI: 10.1016/j.bios.2010.12.022] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Revised: 11/28/2010] [Accepted: 12/13/2010] [Indexed: 10/18/2022]
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