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dc.contributor.authorWustoni, Shofarul
dc.contributor.authorCombe, Craig
dc.contributor.authorOhayon, David
dc.contributor.authorAkhtar, Mahmood Hassan
dc.contributor.authorMcCulloch, Iain
dc.contributor.authorInal, Sahika
dc.date.accessioned2019-08-28T12:32:33Z
dc.date.available2019-08-28T12:32:33Z
dc.date.issued2019-08-25
dc.identifier.citationWustoni, S., Combe, C., Ohayon, D., Akhtar, M. H., McCulloch, I., & Inal, S. (2019). Membrane-Free Detection of Metal Cations with an Organic Electrochemical Transistor. Advanced Functional Materials, 1904403. doi:10.1002/adfm.201904403
dc.identifier.doi10.1002/adfm.201904403
dc.identifier.urihttp://hdl.handle.net/10754/656659
dc.description.abstractAlkali-metal ions, particularly sodium (Na+) and potassium (K+), are the messengers of living cells, governing a cascade of physiological processes through the action of ion channels. Devices that can monitor, in real time, the concentrations of these cations in aqueous media are in demand not only for the study of cellular machinery, but also to detect conditions in the human body that lead to electrolyte imbalance. In this work, conducting polymers are developed that respond rapidly and selectively to varying concentrations of Na+ and K+ in aqueous media. These polymer films, bearing crown-ether-functionalized thiophene units specific to either Na+ or K+, generate an electrical output proportional to the cation type and concentration. Using electropolymerization, the ion-selective polymers are integrated as the gate electrode of an organic electrochemical transistor (OECT). The OECT current changes with respect to the concentration of the ion to which the polymer electrode is selective. Designed as a single, miniaturized chip, the OECT enables the selective detection of the cations within a physiologically relevant range. These electrochemical ion sensors require neither ion-selective membranes nor a reference electrode to operate and have the potential to surpass existing technologies for the detection of alkali-metal ions in aqueous media.
dc.description.sponsorshipThis research was supported by King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research Competitive Research Grants (CRG) OSR award number OSR-2016-CRG5-3003 to S.I. and I.M. Figure 1, inset of Figure 2a, and TOC illustration were produced by Xavier Pita, scientific illustrator at KAUST.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201904403
dc.rightsArchived with thanks to Advanced Functional Materials
dc.subjectbioelectronics
dc.subjectconjugated polymer
dc.subjectcrown ether
dc.subjection sensor
dc.subjectorganic electrochemical transistor
dc.titleMembrane-Free Detection of Metal Cations with an Organic Electrochemical Transistor
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentBioscience Program
dc.contributor.departmentChemical Science Program
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentKing Abdullah University of Science and Technology (KAUST)Biological and Environmental Science and Engineering Thuwal 23955-6900 Saudi Arabia
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalAdvanced Functional Materials
dc.rights.embargodate2020-08-26
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemistry and Center for Plastic ElectronicImperial College London London SW7 2AZ UK
kaust.personWustoni, Shofarul
kaust.personCombe, Craig
kaust.personOhayon, David
kaust.personAkhtar, Mahmood Hassan
kaust.personMcCulloch, Iain
kaust.personInal, Sahika
kaust.grant.numberOSR-2016-CRG5-3003
refterms.dateFOA2020-08-26T00:00:00Z
kaust.acknowledged.supportUnitCompetitive Research
kaust.acknowledged.supportUnitOffice of Sponsored Research
kaust.acknowledged.supportUnitOSR
kaust.acknowledged.supportUnitscientific illustrator


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