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Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities

A. Bernardus Mostert, Karl J. P. Davy, Jeremy L. Ruggles, Ben J. Powell, Ian R. Gentle, Paul Meredith Orcid Logo, Bernard Mostert Orcid Logo

Langmuir, Volume: 26, Issue: 1, Pages: 412 - 416

Swansea University Authors: Paul Meredith Orcid Logo, Bernard Mostert Orcid Logo

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DOI (Published version): 10.1021/la901290f

Abstract

The melanins are an important class of multifunctional biomacromolecules that possess a number of intriguing physical and chemical properties including electrical and photoconductivity. Unusually for a conducting organic material, eumelanin is hydrophilic and its electrical properties are strongly d...

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Published in: Langmuir
ISSN: 0743-7463 1520-5827
Published: 2010
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URI: https://cronfa.swan.ac.uk/Record/cronfa38488
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spelling 2018-02-09T13:33:09.0054734 v2 38488 2018-02-09 Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false a353503c976a7338c7708a32e82f451f 0000-0002-9590-2124 Bernard Mostert Bernard Mostert true false 2018-02-09 SPH The melanins are an important class of multifunctional biomacromolecules that possess a number of intriguing physical and chemical properties including electrical and photoconductivity. Unusually for a conducting organic material, eumelanin is hydrophilic and its electrical properties are strongly dependent on its hydration state. We have therefore measured adsorption isotherms for two polar adsorbates, water and ethanol, in the pressed powder pellets of synthetic eumelanin typically used in electrical studies. We show that a simple kinetic monolayer Langmuir model describes the adsorption and find that there are strong adsorbate−eumelanin interactions in both cases. These isotherms allow the proper scaling of electrical conductivity data and in doing so make progress toward a better understanding of eumelanin electrical properties, which is a critical prerequisite to the design of new eumelanin-like bioelectronic materials. Journal Article Langmuir 26 1 412 416 0743-7463 1520-5827 31 12 2010 2010-12-31 10.1021/la901290f COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2018-02-09T13:33:09.0054734 2018-02-09T13:33:09.0210745 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics A. Bernardus Mostert 1 Karl J. P. Davy 2 Jeremy L. Ruggles 3 Ben J. Powell 4 Ian R. Gentle 5 Paul Meredith 0000-0002-9049-7414 6 Bernard Mostert 0000-0002-9590-2124 7
title Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
spellingShingle Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
Paul Meredith
Bernard Mostert
title_short Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
title_full Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
title_fullStr Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
title_full_unstemmed Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
title_sort Gaseous Adsorption in Melanins: Hydrophilic Biomacromolecules with High Electrical Conductivities
author_id_str_mv 31e8fe57fa180d418afd48c3af280c2e
a353503c976a7338c7708a32e82f451f
author_id_fullname_str_mv 31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
a353503c976a7338c7708a32e82f451f_***_Bernard Mostert
author Paul Meredith
Bernard Mostert
author2 A. Bernardus Mostert
Karl J. P. Davy
Jeremy L. Ruggles
Ben J. Powell
Ian R. Gentle
Paul Meredith
Bernard Mostert
format Journal article
container_title Langmuir
container_volume 26
container_issue 1
container_start_page 412
publishDate 2010
institution Swansea University
issn 0743-7463
1520-5827
doi_str_mv 10.1021/la901290f
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
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description The melanins are an important class of multifunctional biomacromolecules that possess a number of intriguing physical and chemical properties including electrical and photoconductivity. Unusually for a conducting organic material, eumelanin is hydrophilic and its electrical properties are strongly dependent on its hydration state. We have therefore measured adsorption isotherms for two polar adsorbates, water and ethanol, in the pressed powder pellets of synthetic eumelanin typically used in electrical studies. We show that a simple kinetic monolayer Langmuir model describes the adsorption and find that there are strong adsorbate−eumelanin interactions in both cases. These isotherms allow the proper scaling of electrical conductivity data and in doing so make progress toward a better understanding of eumelanin electrical properties, which is a critical prerequisite to the design of new eumelanin-like bioelectronic materials.
published_date 2010-12-31T03:48:40Z
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score 11.016861