Eumelanin-based multisensory platform: A case of study for photolithographic patterning

Author(s)

Paulin, Joao V. ; Albano, Luiz G. S. ; Camargo, Davi H. S. ; Pereira, Mariane P. ; Bregadiolli, Bruna A. ; Graeff, Carlos F. O. ; Bufon, Carlos C. B.

• Document type: Journal article
• Source: APPLIED MATERIALS TODAY; v. 28, p. 9-pg., 2022-08-01.

Abstract

Eumelanin, the most abundant brown-black pigment found in humans, is an ideal candidate for bioelectronics and eco-design technologies due to its biocompatibility, biodegradability, and hydration-dependent conductivity. Here, we validate the use of standard photolithography for integrating synthetic eumelanin into robust solidstate device platforms without unconventional methodologies. By combining AFM, Raman, and XPS with DC and AC electrical measurements, we have shown that eumelanin's film topography, chemical composition, and charge transport are not affected by the pattern process. Based on these findings, we explore interdigitated electrode structures for pH, humidity, and contact sensing system aiming at miniaturized wearable technologies for human healthcare monitoring. (AU)

• FAPESP's process: 20/15869-6 - Rolled-up drain vertical organic transistors towards bioelectronic and neuromorphic applications
• Grantee: João Vitor Paulin
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/07627-0 - Synthesis of conjugated reduced graphene oxide-polythiophene derivatives for application as HTM in perovskite solar cells
• Grantee: Bruna Andressa Bregadiolli
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/25979-2 - Fabrication and characterization of devices and systems based on hybrid nanomembranes
• Grantee: Carlos César Bof Bufon
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties
• Grantee: Adalberto Fazzio
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/25553-3 - Fabrication and characterization of self-rolled up nanomembranes of surface-supported metal-organic frameworks (SURMOFs) for applications in ultracompact electronic devices
• Grantee: Luíz Gustavo Simão Albano
• Support Opportunities: Scholarships in Brazil - Post-Doctoral