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Soft Matter. 2017 May 31;13(21):3954-3965. doi: 10.1039/c6sm02420c.

The structural impact of water sorption on device-quality melanin thin films.

Soft matter

Andrew J Clulow, A Bernardus Mostert, Margarita Sheliakina, Andrew Nelson, Norman Booth, Paul L Burn, Ian R Gentle, Paul Meredith

Affiliations

  1. Centre for Organic Photonics & Electronics, The University of Queensland, St Lucia, QLD 4072, Australia. [email protected].

PMID: 28504279 DOI: 10.1039/c6sm02420c

Abstract

The melanins are a class of pigmentary bio-macromolecules ubiquitous in the biosphere. They possess an intriguing set of physico-chemical properties and have been shown to exhibit hybrid protonic-electronic electrical conductivity, a feature derived from a process termed chemical self-doping driven by the sorption of water. Although the mechanism underlying the electrical conduction has been established, how the sorbed water interacts with the melanin structure at the physical level has not. Herein we use neutron reflectometry to study changes in the structure of synthetic melanin thin films as a function of H

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