A strategy towards melanin-based functional material: RGO and sulfonated melanin composites

• Autor(a) principal: Bregadiolli, Bruna Andressa [UNESP]
• Data de Publicação: 2021
• Outros Autores: Paulin, João Vitor [UNESP], Albano, Luiz Gustavo Simão, Martins, Lucas Michelão [UNESP], De Camargo, Davi Henrique Starnini, Da Silva-Filho, Luiz Carlos [UNESP], Bufon, Carlos Cesar Bof [UNESP], Graeff, Carlos Frederico De Oliveira [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1039/d1tc02749b; http://hdl.handle.net/11449/233895

Melanin is a natural pigment and is one of the most promising materials in the emerging field of bioelectronics. The low conductivity of this class of materials is a limiting factor to their implementation in 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 applications in bioelectronics and/or organic electronics. This journal is