Field-effect and capacitive properties of water-gated transistors based on polythiophene derivatives | Zendy

Rossella Porrazzo | Zendy; Sebastiano Bellani | Zendy; Alessandro Luzio | Zendy; Chiara Bertarelli | Zendy; Guglielmo Lanzani | Zendy; Mario Caironi | Zendy; Maria Rosa Antognazza | Zendy

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Field-effect and capacitive properties of water-gated transistors based on polythiophene derivatives

Author(s) -

Rossella Porrazzo,

Sebastiano Bellani,

Alessandro Luzio,

Chiara Bertarelli,

Guglielmo Lanzani,

Mario Caironi,

Maria Rosa Antognazza

Publication year - 2014

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4900888

Subject(s) - polythiophene , materials science , alkyl , polymer , side chain , capacitance , transistor , conjugated system , field effect transistor , conductive polymer , capacitive sensing , nanotechnology , chemical physics , organic chemistry , electrical engineering , chemistry , electrode , composite material , voltage , engineering

Recently, water-gated organic field-effect transistors (WGOFET) have been intensively studied for their application in the biological field. Surprisingly, a very limited number of conjugated polymers have been reported so far. Here, we systematically explore a series of polythiophene derivatives, presenting different alkyl side chains lengths and orientation, and characterized by various morphologies: comparative evaluation of their performances allows highlighting the critical role played by alkyl side chains, which significantly affects the polymer/water interface capacitance. Reported results provide useful guidelines towards further development of WGOFETs and represent a step forward in the understanding of the polymer/water interface phenomena

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