Sensing with FETs - once, now and future

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    In this paper a short overview is given of the several FET-based sensor devices and the operational principle of the ISFET is summarized. Some of the shortcomings of the FET sensors were circumvented by an alternative operational mode, resulting in a device capable of acid/base concentration determination by coulometric titrant generation as well as in an original pH-static enzyme sensor. A more recent example is presented in which the ISFET is used for the on-line monitoring of fermentation processes. Future research is directed towards direct covalent coupling of organic monolayers on the silicon itself. In addition, the field-effect can be applied to the so-called semiconducting nanowire devices, ultimately making single molecule detection of charged species possible.
    Original languageEnglish
    Title of host publication8. Dresdner Sensor-Symposium
    Subtitle of host publicationSensoren für Umwelt, Klima und Sicherheit
    EditorsGerald Gerlach, Peter Hauptmann
    Place of PublicationDresden
    Number of pages8
    ISBN (Print)978-3-940046-45-1
    Publication statusPublished - 10 Dec 2007
    Event8. Dresdner Sensor-Symposium, DSS 2007 - Dresden, Germany
    Duration: 10 Dec 200712 Dec 2007
    Conference number: 8

    Publication series

    NameDresdner Beiträge zur Sensorik


    Conference8. Dresdner Sensor-Symposium, DSS 2007
    Abbreviated titleDSS


    • EWI-11860
    • METIS-245994
    • IR-64609


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