| Title | Exploring ion mobility mechanisms in poly indolequinone polymers: a case study on black soldier fly melanin |
|---|---|
| ID_Doc | 23278 |
| Authors | Ambrico, M; Mostert, AB; Ambrico, PF; Phua, J; Mattiello, S; Gunnella, R |
| Title | Exploring ion mobility mechanisms in poly indolequinone polymers: a case study on black soldier fly melanin |
| Year | 2024 |
| Published | Journal Of Physics D-Applied Physics, 57, 26 |
| 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. |
| https://iopscience.iop.org/article/10.1088/1361-6463/ad3765/pdf |
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