Chemical stability and reversibility of PEDOT:PSS electrodes in view of low-cost biocompatible cellulose-assisted biosensors

Machrafi, Hatim; Bobinac, I.; Dongo, P.; Gallo, V.; Iermano, F.; Iorio, C. S.

doi:10.1016/j.mtcomm.2021.102437

Article (Scientific journals)

Chemical stability and reversibility of PEDOT:PSS electrodes in view of low-cost biocompatible cellulose-assisted biosensors

Machrafi, Hatim; Bobinac, I.; Dongo, P. et al.

2021 • In Materials Today Communications, 27

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/266695

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10.1016/j.mtcomm.2021.102437

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Keywords :

Biocompatible electrode; PEDOT:PSS hydrogel; Reversibility; Additives; Biosensors; Cathodes; Cellulose; Chemical stability; Conducting polymers; Drug delivery; Electric batteries; Electric conductivity; Hydrogels; Mechanical stability; Thin films; Wearable technology; Biosensing devices; Cross-linkers; Electrical conductivity; Low-costs; PEDOT/PSS; Preparation method; Biocompatibility; Batteries; Resistivity

Abstract :

[en] The increasing necessity for small electronics and wireless technologies in energetic devices, such as batteries or supercapacitors and in medical devices, such as sensors, drug delivery systems, calls for new materials, devices and preparation methods. In this work, the possibility of using a PEDOT:PSS hydrogel film as a cathode for a biocompatible cellulose-assisted biosensing device has been explored. The effect of film formulation and preparation method on the electrical conductivity is investigated, i.e. adding a cross-linker and different solvent additives on one side and adding an ionic liquid with and without a metal salt on the other side, for two film thicknesses. The chemical composition of the electrode is studied as a function of the used formulation as well as after being used as cathode in the biosensing device. It appeared that the electrode based on the cross-linker was mechanically robust, but suffered in electrical conductivity, despite the enhancement provided by the solvent additives. The electrode based on the ionic liquid showed a considerable increase in electrical performance, although the mechanical stability was not easy to maintain. The thin film showed a higher electrical conductivity. Although the metal salt enhanced somewhat further the electrical performance, the mechanical one suffered considerably. An application of the PEDOT:PSS electrode as cathode in a biosensing device showed promising results. Concentrations of the order of μl were measured without difficulty and the cathode seemed to be chemically stable and therefore reutilisable, opening future applications in reutilisable low-cost wearable biosensors and corresponding wearable batteries. © 2021 Elsevier Ltd

Disciplines :

Chemistry

Author, co-author :

Machrafi, Hatim ; Université de Liège - ULiège > GIGA In silico med. - Thermodynamics of Irreversible Proces.

Bobinac, I.; Physical Chemistry Group, Université Libre de Bruxelles, Belgium

Dongo, P.; Physical Chemistry Group, Université Libre de Bruxelles, Belgium

Gallo, V.; Physical Chemistry Group, Université Libre de Bruxelles, Belgium

Iermano, F.; Physical Chemistry Group, Université Libre de Bruxelles, Belgium

Iorio, C. S.; Physical Chemistry Group, Université Libre de Bruxelles, Belgium

Language :

English

Title :

Chemical stability and reversibility of PEDOT:PSS electrodes in view of low-cost biocompatible cellulose-assisted biosensors

Publication date :

2021

Journal title :

Materials Today Communications

eISSN :

2352-4928

Publisher :

Elsevier Ltd

Volume :

Peer reviewed :

Peer Reviewed verified by ORBi

European Projects :

H2020 - 785219 - GrapheneCore2 - Graphene Flagship Core Project 2

Funders :

EU - European Union [BE]

Available on ORBi :

since 06 January 2022

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