Polyelectrolyte Layer-by-Layer Assembly on Organic Electrochemical Transistors

Anna-Maria Pappa, Sahika Inal, Kirsty Roy, Yi Zhang, Charalampos Pitsalidis, Adel Hama, Jolien Pas, George G. Malliaras, Roisin M. Owens

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


Oppositely charged polyelectrolyte multilayers (PEMs) were built up in a layer-by-layer (LbL) assembly on top of the conducting polymer channel of an organic electrochemical transistor (OECT), aiming to combine the advantages of well-established PEMs with a high performance electronic transducer. The multilayered film is a model system to investigate the impact of biofunctionalization on the operation of OECTs comprising a poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS) film as the electrically active layer. Understanding the mechanism of ion injection into the channel that is in direct contact with charged polymer films provides useful insights for novel biosensing applications such as nucleic acid sensing. Moreover, LbL is demonstrated to be a versatile electrode modification tool enabling tailored surface features in terms of thickness, softness, roughness, and charge. LbL assemblies built up on top of conducting polymers will aid the design of new bioelectronic platforms for drug delivery, tissue engineering, and medical diagnostics.
Original languageEnglish (US)
Pages (from-to)10427-10434
Number of pages8
JournalACS Applied Materials & Interfaces
Issue number12
StatePublished - Mar 16 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the Marie Curie ITN project OrgBio No. 607896 and the Agence Nationale de la Recherche 3Bs project. The authors are grateful to Alberto Salleo for fruitful discussions and to NeuroSys for the kind gift of mRNA.


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