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Engineering polydopamine films with tailored behaviour for next-generation eumelanin-related hybrid devices

Content Provider	Royal Society of Chemistry (RSC)
Author	Farinola, Gianluca M. d'Ischia, Marco Vecchia, Nicola F. Della Ambrico, Marianna Cardone, Antonio Cicco, Stefania R. Augelli, Vincenzo Ambrico, Paolo F. Ligonzo, Teresa Talamo, Maurizio Mastropasqua Napolitano, Alessandra
Copyright Year	2013
Abstract	Eumelanin-type biopolymers have attracted growing interest in the quest for soft bioinspired functional materials for application in organoelectronics. Recently, a metal-insulator-semiconductor device with a good quality interface was produced by spin coating of a commercial synthetic eumelanin-like material on a dry plasma-modified silicon surface. As a proof-of-concept step toward the design and implementation of next-generation eumelanin-inspired devices, we report herein an expedient chemical strategy to bestow n-type performance to polydopamine, a highly popular eumelanin-related biopolymer with intrinsic semiconductor behaviour, and to tune its electrical properties. The strategy relies on aerial co-oxidation of dopamine with suitable aromatic amines, e.g. 3-aminotyrosine or p-phenylenediamine, leading to good quality black polymeric films. Capacitance–voltage experiments on poly(dopamine/3-aminotyrosine) and poly(dopamine/p-phenylenediamine)-based metal insulator semiconductor devices on p-Si indicated a significant increase in flat band voltage with respect to polydopamine and previous synthetic eumelanin-based diodes. Variations of the flat band voltage under vacuum were observed for each device. These results point to polydopamine as a versatile eumelanin-type water-dependent semiconductor platform amenable to fine tuning of its electronic properties through incorporation of π-conjugating aromatic amines to tailor functionality.
Starting Page	1018
Ending Page	1028
Page Count	11
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	1
Issue Number	5
Journal	Journal of Materials Chemistry C
DOI	10.1039/c2tc00480a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spin coating Extrinsic semiconductor Biopolymer Semiconductor Dopamine P-Phenylenediamine
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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