Abstract

Inspired by the powerful photosensitizing properties of the red hair pigments pheomelanins, a photoresponsive cysteine-containing variant of the adhesive biopolymer polydopamine (pDA) is developed via oxidative copolymerization of dopamine (DA) and 5-S-cysteinyldopamine (CDA) in variable ratios.Chemical and spectral analysis indicate the presence of benzothiazole/benzothiazine units akin to those of pheomelanins. p(DA/CDA) copolymers displayimpedance properties similar to those of biological materials and a marked photoimpedance response to light stimuli. The use of the p(DA/CDA) copolymerto implement a solution-processed hybrid photocapacitive/resistive metalinsulator- semiconductor (MIS) device disclosed herein is the fi rst example oftechnological exploitation of photoactive, red-hair-inspired biomaterials as soft enhancement layer for silicon in an optoelectronic device. The bio-inspiredmaterials described herein may provide the active component of new hybrid photocapacitive sensors with a chemically tunable response to visible light.

Autore Pugliese

• Ambrico Marianna , Ambrico Paolo Francesco , Cardone Antonio , Cicco Stefania Roberta

Tutti gli autori

• Ambrico M.; Della Vecchia N. F.; Ambrico P.; Cardone A.; Cicco S. R.; Ligonzo T.; Avolio R.; Napolitano A.; d'Ischia M.

Titolo volume/Rivista

Advanced functional materials

Anno di pubblicazione

2014

ISSN

1616-301X

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

Non Disponibile