Défense publique de thèse de doctorat en Sciences chimiques - Sébastien VIVEGNIS

From the solution to the coating: On the elaboration of brass alloys, nanoporous copper substrates and nanostructured silicon films

Jury

• Prof. Laurent HOUSSIAU (département de physique, UNamur), président
  Prof. Zineb MEKHALIF (département de chimie, UNamur), promotrice et secrétaire
  Prof. Guillaume BERIONNI (département de chimie, UNamur)
  Prof. Jean-François VAN HUMBEECK (CRM Groupe)
  Prof. Frank RENNER (UHasselt), co-promoteur
  Prof. Marlies VAN BAEL (UHasselt)
  Prof. Patricia LOSADA-PÉREZ (ULB)

Abstract

Over the last decades, the development of nanoporous materials has attracted increased interest in the fields of catalysis, energy storage, biotechnology, (bio)sensing and photocatalysis. The tremendously high specific surface of nanoporous materials, as well as their versatile structure and composition explain the growing interest towards these materials. Moreover, the elaboration of model materials is also a driving force in the fundamental research in order to push the boundaries of knowledge and reveal new properties and applications.

In this context, the present thesis aims to study and elaborate nanoporous copper substrates and nanostructures of silicon embedded in the nanoporous copper substrate. The nanoporous copper are prepared following a consecutive alloying/dealloying approach. Firstly, the co-electrodeposition of Zn-rich brass alloys using two complexing agents (i.e. triethanolamine and pyrophosphate) was studied. Secondly, the Zn-rich brass alloys were chemically dealloyed by a one-step immersion in acidic medium or a two-steps consecutive immersion in basic then acidic media, resulting in the formation of open-framework nanoporous copper substrates. Thirdly, the electrodeposition of silicon onto planar and nanoporous copper substrates was conducted from organic solvents.

Lien

https://medias.unamur.be/lives/live-accueil-auditoire-ch01/

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