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Electron Hopping Across Hemin-Doped Serum Albumin Mats on Centimetre-Length Scales

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Title: Electron Hopping Across Hemin-Doped Serum Albumin Mats on Centimetre-Length Scales
Authors: Amdursky, N
Wang, X
Meredith, P
Riley, DJ
Payne, DJ
Bradley, D
Stevens, MM
Item Type: Journal Article
Abstract: Exploring long-range electron transport across protein assemblies is a central interest in both the fundamental research of biological processes and the emerging field of bioelectronics. This work examines the use of serum-albumin-based freestanding mats as macroscopic electron mediators in bioelectronic devices. In particular, this study focuses on how doping the protein mat with hemin improves charge-transport. It is demonstrated that doping can increase conductivity 40-fold via electron hopping between adjacent hemin molecules, resulting in the highest measured conductance for a protein-based material yet reported, and transport over centimeter length scales. The use of distance-dependent AC impedance and DC current–voltage measurements allows the contribution from electron hopping between adjacent hemin molecules to be isolated. Because the hemin-doped serum albumin mats have both biocompatibility and fabrication simplicity, they should be applicable to a range of bioelectronic devices of varying sizes, configurations, and applications.
Issue Date: 31-May-2017
Date of Acceptance: 30-Mar-2017
URI: http://hdl.handle.net/10044/1/46153
DOI: https://dx.doi.org/10.1002/adma.201700810
ISSN: 1521-4095
Publisher: Wiley
Journal / Book Title: Advanced Materials
Volume: 29
Issue: 27
Copyright Statement: © 2017 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: The Royal Society
Wellcome Trust
Commission of the European Communities
Commission of the European Communities
Funder's Grant Number: UF100105
098411/Z/12/Z
ERC-2013-CoG-616417
PIEF-GA-2013-623123
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
current-voltage
electron transfer
impedance spectroscopy
protein films
SHEWANELLA-ONEIDENSIS MR-1
CHEMICALLY-MODIFIED ENZYMES
MICROBIAL NANOWIRES
BACTERIAL NANOWIRES
METAL-ELECTRODES
GLUCOSE-OXIDASE
TRANSPORT
LONG
BIOFILMS
FILMS
02 Physical Sciences
03 Chemical Sciences
09 Engineering
Publication Status: Published
Article Number: 1700810
Appears in Collections:Faculty of Engineering
Materials
Faculty of Natural Sciences



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