| Full text | |
| Author(s): |
Paulin, J. V.
[1, 2]
;
Coleone, A. P.
[1]
;
Batagin-Neto, A.
[3, 1]
;
Burwell, G.
[2]
;
Meredith, P.
[2, 4]
;
Graeff, C. F. O.
[5, 1]
;
Mostert, A. B.
[6]
Total Authors: 7
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Sch Sci, Postgrad Program Sci & Technol Mat POSMAT, Bauru, SP - Brazil
[2] Swansea Univ, Dept Phys, Singleton Pk, Swansea SA2 8PP, W Glam - Wales
[3] Sao Paulo State Univ UNESP, Campus Itapeva, Itapeva - Brazil
[4] Univ Queensland, Sch Math & Phys, St Lucia Campus, Brisbane, Qld 4072 - Australia
[5] Sao Paulo State Univ UNESP, Sch Sci, Dept Phys, Bauru, SP - Brazil
[6] Swansea Univ, Dept Chem, Singleton Pk, Swansea SA2 8PP, W Glam - Wales
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | JOURNAL OF MATERIALS CHEMISTRY C; v. 9, n. 26, p. 8345-8358, JUL 14 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Melanins are an essential natural pigment found throughout nature. Due to their inherent biocompatibility, optical and electronic properties, the melanins are attracting attention as model materials for sustainable organic optoelectronic and bioelectronic applications. Standard melanin is notoriously insoluble, which complicates processability considerably. Hence, the creation of synthetic derivatives that have similar optical-electronic properties but with increased solubility are avenues of active investigation. In this work, we investigate soluble non-functionalised (NF) and sulfonated (S) melanin derivatives. So far, these new synthetic derivatives' optical and electrical properties have not been explored in full, which would allow their effective application in optoelectronic devices. Our optical results suggest that these materials have high refractive indices and also high dispersion and chromatic aberration. In addition, no significant differences in NF-melanin's charge transport deposited from pure water or aqueous ammonia solution were observed, and S-melanin's functional groups did not affect the hydration-dependence conductivity, only its sensitivity to environmental humidity. The similarities and differences in spectra and values comparing NF and S-melanin are discussed based on their structural differences. (AU) | |
| FAPESP's process: | 12/03116-7 - Simulation of electronic and optical properties of organic materials |
| Grantee: | Augusto Batagin Neto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| 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: | 15/23000-1 - Vertical organic field-effect transistor using dyes of natural origin as active layer |
| Grantee: | João Vitor Paulin |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 18/02411-1 - Proton injecting systems based on melanin derivatives |
| Grantee: | João Vitor Paulin |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |