A strategy towards melanin-based functional material: rGO and sulfonated melanin composites
Melanin is a natural pigment and one of the most promising materials for the emerging field of bioelectronics. The low conductivity of this class of materials is a limiting factor to their implementation on electronics. In this work, we have improved the electrical properties of a melanin-like mater...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/215226 |
| Acceso en línea: | http://hdl.handle.net/11449/215226 |
| Access Level: | acceso abierto |
| Palabra clave: | Bioeletronic material Melanin rGO Composites Electrical Properties |
| Sumario: | Melanin is a natural pigment and one of the most promising materials for the emerging field of bioelectronics. The low conductivity of this class of materials is a limiting factor to their implementation on electronics. In this work, we have improved the electrical properties of a melanin-like material by combining it with reduced graphene oxide (rGO). Three different concentrations of rGO (5, 10 and 15 wt%) were studied. The composites were structurally (SEM, Raman, XPS, FTIR, and solid-state NMR) and optically (UV-vis and PL) characterized. The electrical properties were investigated through transient current, current-voltage curves and electrochemical impedance under different humidity levels. An improved DC conductivity was found for the 15%rGO@sulfonated melanin composite. The results suggest that, together with sulfonated melanin, it could potentially be suitable for application in bioelectronics and/or organic electronics |
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