La présentation sera en anglais et en ligne.

Eumelanin, the black-brown biopigment belonging to the melanin family, is a candidate for green electronics. Ubiquitous in flora and fauna, eumelanin is a chemically and structurally disordered biomacromolecule that requires model systems to at least reveal the mechanisms that control the electronic transport physics. Over the last two decades, research on eumelanin has progressed and promoted its potential use in energy storage devices, biosensors, and organic thin-film transistors. However, a well-defined structure-functional property relationship of eumelanin is highly desired to guide the device fabrication with optimized performance. 

In this talk, I will review the current understanding of the charge carrier transport in eumelanin. Then I will discuss the implications of various environmental conditions (ambient, ammonia atmosphere, Nitrogen atmosphere) on the morphological and chemical structure of solution-processed eumelanin films revealed by AFM, IR, and UV-vis spectroscopy. 1 The dependence of the HOMO-LUMO gap on film preparation (solution processing vs thermal evaporation), measured by the ultraviolet photoemission spectroscopy (UPS) and inverse photoemission spectroscopy (IPES), will also be discussed. 2 Finally, the provided results pave the way for the design of optimized metal-eumelanin interfaces for green organic electronic applications. 
 

Biographie

Dieudonné a obtenu sa maîtrise en génie physique de l'Université des Sciences et Techniques d'Oran en 2016, Algérie. Il a travaillé pour Lumitel Burundi jusqu'en 2019 puis a rejoint Polytechnique Montréal, où il fait son doctorat. thèse. Ses travaux et intérêts de recherche consistent à développer des dispositifs électroniques utilisant des matériaux bio-sourcés parmi lesquels l'eumélanine est l'une des priorités. Dieudonné est également étudiant stagiaire dans le programme CREATE SEED (https://www.polymtl.ca/create-seed/en/about) qui se concentre sur la promotion de la durabilité dans les industries électroniques et l'éco-conception.