title: Critical assessment of graphene as ion-to-electron transducer for all-solid-state potentiometric sensors.
abstract: Carboxy-functionalized graphene was used as a solid contact for potassium ion-selective electrodes with poly(vinyl chloride) based membrane. Transducer layers were obtained simply by application of a dispersion of graphene derivative in water. Analytical performance of thus obtained sensors was compared with that of all-solid-state sensors with typical transducer materials: poly(octylthiophene) applied as chloroform solution, conducting polymers available as aqueous dispersions of poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) ions or polyaniline. It was found that all sensors tested were characterized with similar analytical parameters. Carboxy-functionalized graphene contact layer was in some respect similar to polyaniline one, what most probably results from the presence of pH sensitive groups in both materials.
authors: Department of Chemistry, Warsaw University, Pasteura 1, PL-02 093 Warsaw, Poland.
authors: Ewa
authors: E
authors: Jaworska
authors: Wiktor
authors: W
authors: Lewandowski
authors: Józef
authors: J
authors: Mieczkowski
authors: Krzysztof
authors: K
authors: Maksymiuk
authors: Agata
authors: A
authors: Michalska