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Exploring ion mobility mechanisms in poly indolequinone polymers: a case study on black soldier fly melanin
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Bernard Mostert ,
P F Ambrico ,
J Phua ,
S Mattiello ,
R Gunnella
Journal of Physics D: Applied Physics, Volume: 57, Issue: 26, Start page: 265303
Swansea University Author:
Bernard Mostert
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DOI (Published version): 10.1088/1361-6463/ad3765
Abstract
Black soldier fly (BSF) melanin is a new supply of the brown-black pigment eumelanin. Given that eumelanin is a model bioelectronic material for applications such as medical devices and sensors, understanding BSF melanin's electrical properties is important to confirm its viability as an advanc...
| Published in: | Journal of Physics D: Applied Physics |
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| ISSN: | 0022-3727 1361-6463 |
| Published: |
IOP Publishing
2024
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa67143 |
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| Abstract: |
Black soldier fly (BSF) melanin is a new supply of the brown-black pigment eumelanin. Given that eumelanin is a model bioelectronic material for applications such as medical devices and sensors, understanding BSF melanin's electrical properties is important to confirm its viability as an advanced material. Presented here is a systematic, hydration dependent alternating current study of BSF melanin utilising both H2O and D2O vapours. There is a clear difference between the vapours, enabling a thorough analysis including Nyquist plots with model circuit analysis, broad band dielectric spectroscopic modelling as well as applying the Trukhan model to understand free ion concentration and mobility changes as a function of hydration. We find that BSF melanin behaves similarly to previous reports on synthetic systems, and the analysis here sheds additional light on potential charge transport changes. Significantly, a key finding is that there are two different mobility mechanisms for ion transport depending on hydration. |
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| Keywords: |
BSF/melanin, hydration, mobility, circular economy |
| College: |
Faculty of Science and Engineering |
| Funders: |
M A aknowledges the CNR-Short Term Mobility program 2021 Prot.0052594/230721; M A and P F A acknowledge the Italian Ministry of University and Research (MUR) PONa3_00369 SISTEMA; This work has been funded by Italian Ministry of University and Research (MUR), PRIN MUSSEL- 2017YJMPZN MUSSEL. R G acknowledges the European Union—NextGenerationEU under the Italian Ministry of University and Research (MUR) National Innovation Ecosystem grant ECS00000041—VITALITY—Spoke 9. For A B M: 'This work was also supported by the UKRI Research Partnerships Investment Fund through the Centre for Integrative Semiconductor Materials.' |
| Issue: |
26 |
| Start Page: |
265303 |