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    Membrane-Free Detection of Metal Cations with an Organic Electrochemical Transistor

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    Revised Manuscript_Wustoni et al_Adv Func Mat 2019.pdf
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    1.008Mb
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    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Wustoni, Shofarul cc
    Combe, Craig
    Ohayon, David
    Akhtar, Mahmood Hassan
    McCulloch, Iain cc
    Inal, Sahika cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Program
    Chemical Science Program
    Environmental Science and Engineering Program
    KAUST Solar Center (KSC)
    King Abdullah University of Science and Technology (KAUST)Biological and Environmental Science and Engineering Thuwal 23955-6900 Saudi Arabia
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-2016-CRG5-3003
    Date
    2019-08-25
    Embargo End Date
    2020-08-26
    Permanent link to this record
    http://hdl.handle.net/10754/656659
    
    Metadata
    Show full item record
    Abstract
    Alkali-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.
    Citation
    Wustoni, 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
    Sponsors
    This 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.
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.201904403
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201904403
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.201904403
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Bioscience Program; Environmental Science and Engineering Program; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)

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