Chemically grafted field-effect transistors for the recognition of ionic species in aqueous solutions

Elaboration and electrical characterization of silicone-based anion-exchange materials

“…Secondly, the ionophore has to be chemically attached, either onto the electrode surface [22] or to the polymer [23]. Chemical grafting to the electrode surface as a monolayer often results in a poor sensitivity [24,25]; grafting as a thick layer by means of a solgel process provided a high sensitivity [26] but was difficult to achieve reproducibly [27]. A method consisting in the synthesis of a functional polymer by A method that combines the advantages of chemical attachment and a high enough density of ion-exchange sites inside a thick layer consists in the chemical grafting of the ionophore onto a polymer and subsequently coating the transducer with the functional polymer [28].…”