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Understanding Melanin: A Nano-Based Material for the future
Nanomaterials, Issue: 1st
Swansea University Author:
Bernard Mostert
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DOI (Published version): 10.1201/b20041-6
Abstract
Melanin, the human skin pigment, is an emerging bioelectronic material due to its unique electrical properties as well as being readily prepared in electronic grade thin films on the nanometer scale. These electrical properties include bistable electrical switching, broadband optical absorbance, Arrh...
Published in: | Nanomaterials |
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ISBN: | 978-981-4669-72-6 978-981-4669-73-3 |
Published: |
New York
Pan Stanford
2016
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URI: | https://cronfa.swan.ac.uk/Record/cronfa38478 |
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v2 38478 2018-02-09 Understanding Melanin: A Nano-Based Material for the future a353503c976a7338c7708a32e82f451f 0000-0002-9590-2124 Bernard Mostert Bernard Mostert true false 2018-02-09 BGPS Melanin, the human skin pigment, is an emerging bioelectronic material due to its unique electrical properties as well as being readily prepared in electronic grade thin films on the nanometer scale. These electrical properties include bistable electrical switching, broadband optical absorbance, Arrhenius-dependent conductivity, and an electron paramagnetic free-radical signal. Furthermore, melanin has other electrical properties, such as water-dependent conductivity and potential protonic conduction. However, to use melanin as a bioelectronic material, greater clarity is required on its charge transport behavior. Here we show that the current charge transport model for melanin, an amorphous semiconductor model, cannot describe melanin’s hydration-dependent conductivity. We go on to show with a hydration-dependent muon spin resonance (μSR) experiment that melanin’s charge transport properties are described by a comproportionation reaction, in which water self-dopes the system with extra charge carriers. This new understanding of melanin’s charge transport properties opens up new avenues of exploration. We specifically see melanin as a candidate for nanoscale devices, which can act as transducers of ionic signals to electronic signals. Book chapter Nanomaterials 1st Pan Stanford New York 978-981-4669-72-6 978-981-4669-73-3 Melanin, muon spin resonance, bioelectronics, charge transport, free radical 22 1 2016 2016-01-22 10.1201/b20041-6 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University 2024-07-31T22:03:39.2563627 2018-02-09T12:27:42.4744234 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Bernard Mostert 0000-0002-9590-2124 1 P Meredith 2 B Powell 3 I Gentle 4 G Hanson 5 F Pratt 6 |
title |
Understanding Melanin: A Nano-Based Material for the future |
spellingShingle |
Understanding Melanin: A Nano-Based Material for the future Bernard Mostert |
title_short |
Understanding Melanin: A Nano-Based Material for the future |
title_full |
Understanding Melanin: A Nano-Based Material for the future |
title_fullStr |
Understanding Melanin: A Nano-Based Material for the future |
title_full_unstemmed |
Understanding Melanin: A Nano-Based Material for the future |
title_sort |
Understanding Melanin: A Nano-Based Material for the future |
author_id_str_mv |
a353503c976a7338c7708a32e82f451f |
author_id_fullname_str_mv |
a353503c976a7338c7708a32e82f451f_***_Bernard Mostert |
author |
Bernard Mostert |
author2 |
Bernard Mostert P Meredith B Powell I Gentle G Hanson F Pratt |
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Book chapter |
container_title |
Nanomaterials |
container_issue |
1st |
publishDate |
2016 |
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Swansea University |
isbn |
978-981-4669-72-6 978-981-4669-73-3 |
doi_str_mv |
10.1201/b20041-6 |
publisher |
Pan Stanford |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics |
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description |
Melanin, the human skin pigment, is an emerging bioelectronic material due to its unique electrical properties as well as being readily prepared in electronic grade thin films on the nanometer scale. These electrical properties include bistable electrical switching, broadband optical absorbance, Arrhenius-dependent conductivity, and an electron paramagnetic free-radical signal. Furthermore, melanin has other electrical properties, such as water-dependent conductivity and potential protonic conduction. However, to use melanin as a bioelectronic material, greater clarity is required on its charge transport behavior. Here we show that the current charge transport model for melanin, an amorphous semiconductor model, cannot describe melanin’s hydration-dependent conductivity. We go on to show with a hydration-dependent muon spin resonance (μSR) experiment that melanin’s charge transport properties are described by a comproportionation reaction, in which water self-dopes the system with extra charge carriers. This new understanding of melanin’s charge transport properties opens up new avenues of exploration. We specifically see melanin as a candidate for nanoscale devices, which can act as transducers of ionic signals to electronic signals. |
published_date |
2016-01-22T22:03:40Z |
_version_ |
1806130028860145664 |
score |
11.021648 |