Eumelanin: From Molecular State to Film
| Autor: | Alessandro Pezzella, Jordan De Angelis, Manuel Reali, Anthony Camus, Guillaume Beaulieu, Christian Pellerin, Clara Santato |
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| Přispěvatelé: | Université de Montréal. Faculté des arts et des sciences. Département de chimie |
| Rok vydání: | 2021 |
| Předmět: |
Organic electronics
Materials science Infrared Hysteresis Chemical structure Polymer films Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Infrared light 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Ammonia Physical and Theoretical Chemistry 0210 nano-technology Macromolecule |
| Zdroj: | The Journal of Physical Chemistry C. 125:3567-3576 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.0c10063 |
| Popis: | Eumelanin, a macromolecular biopigment, is an attractive candidate for sustainable (green) organic electronics. Establishing structure–property relationships in eumelanin films is an essential step to exploit its technological potential. We report on the evolution from the molecular state to film after spin coating on silicon dioxide solutions of (5,6)-dihydroxyindole (DHI) and (5,6)-dihydroxyindole-2-carboxylic acid (DHICA) eumelanin building blocks (monomers). The evolution of the spin-coated films was studied under various environmental conditions, such as ambient vs an ammonia atmosphere, which catalyzes polymerization. Atomic force microscopy images reveal dramatic morphological changes as a function of the environmental conditions. Infrared and UV–vis spectroscopies indicate that these changes are due to a combination of physical (self-assembly) and chemical (polymerization) processes. Preliminary electrical measurements on films were also carried out. |
| Databáze: | OpenAIRE |
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