| Full text | |
| Author(s): |
Nozella, Natan L.
;
Paulin, Joao V.
;
Nogueira, Gabriel L.
;
Guerra, Nayrim B.
;
de Oliveira, Rafael F.
;
Graeff, Carlos F. O.
Total Authors: 6
|
| Document type: | Journal article |
| Source: | ACS APPLIED ELECTRONIC MATERIALS; v. 7, n. 8, p. 6-pg., 2025-04-03. |
| Abstract | |
Sustainability demands innovative materials and technologies to address environmental and societal needs. In this context, natural biomaterials are gaining significant attention, with eumelanin (EuM) standing out due to its biocompatibility, abundance, and distinct electronic properties. However, the conducting nature of EuM and the main carrier involved in the charge transport have been the subject of a long-standing and inconclusive debate. This work contributes to this discussion by presenting the observation of n-type conduction in EuM films employed as channel material in organic electrochemical transistors (OECTs). The device current is modulated based on strong ionic electronic coupling between electrolyte cations and the pi electron system of EuM's indole units, resulting in charge mobility of mu OECT = 0.019 +/- 0.016 cm2 V-1 s-1. Our findings provide an innovative contribution to the ongoing debate on the semiconducting properties of EuM and demonstrate a novel electronic device, highlighting the remarkable potential of EuM for sustainable electronics. (AU) | |
| FAPESP's process: | 21/06238-5 - Functionalized solution-processed 2D materials: development of prototyping electric sensors and biosensors |
| Grantee: | Rafael Furlan de Oliveira |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 22/00410-3 - Obtation and characterization of organic electrochemical transistors based on melanin |
| Grantee: | Natan Luis Nozella |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 22/10998-8 - Development of perovskite and Nb2O5 films aiming at the stability of perovskite solar cells |
| Grantee: | Gabriel Leonardo Nogueira |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/07296-2 - CDMF - Center for the Development of Functional Materials |
| Grantee: | Elson Longo da Silva |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 21/09207-3 - Fabrication of electrochemical transistors based on doped melanin with improved ionic and electronic conductivity |
| Grantee: | Nayrim Brizuela Guerra |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |