DI-UMONS : Dépôt institutionnel de l’université de Mons

Recherche transversale
(titres de publication, de périodique et noms de colloque inclus)
2019-09-01 - Colloque/Présentation - communication orale - Anglais - page(s)

Thiry Damien , Vinx Nathan , Damman Pascal , Tessier Pierre-Yves, Snyders Rony , "Recent advances in the control of the nano-architecture of organic-based thin films" in Euromat 2019, Stockholm, Suède, 2019

  • Codes CREF : Chimie des surfaces et des interfaces (DI1327)
  • Unités de recherche UMONS : Chimie des interactions plasma-surface (S882)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Centre d’Innovation et de Recherche en Matériaux Polymères (CIRMAP)

Abstract(s) :

(Anglais) Introduction/Purpose Nowadays, the development of strategies for the fabrication of structured surfaces continues to attract a considerable attention [1]. In this context, in this work, an innovative approach including the controlled generation of surfaces instabilities in bilayer system based on a mechnically responsive plasma polymer films (PPF) in combination with stiffer coatings is developed. Methods As a case study, the PPF were grown from propanethiol on silicon or PET substrates. The mechanical properties of the PPF playing a key role in the deformation mechanism are investigated by the AFM force measurements method. For inducing the reorganization of the material, a top Al thin film is synthesized by the magnetron sputtering technique. Results The analysis of the AFM data reveals that the nature of the PPF is dramatically affected by the substrate temperature (Ts): from a high viscous liquid (η ~ 106 Pa.s.) to a viscoelastic (E ~ 0,1 GPa) and finally to a stiffer elastic solid (E ~ 0,9 GPa) material when increasing Ts from 10°C to 45°C. When the PPF are further covered by an Al thin film, it results in the formation of a wrinkled surface (Figure 1). The dimensions of the wrinkles can be adjusted in a wide range (i.e. from the nanometer to the micrometer scale) tuning the mechanical properties of the PPF. For applicative purpose, the same methodology has been applied on PET substrate. It has been shown that for a given strain, the electrical resistivity of the Al wrinkled structure is mostly unchanged in comparison to a flat Al thin film deposited on PET ehxibiting a drastic increase (i.e. 400 %). These data clearly pave the way for the fabrication of flexible electrode. Conclusions The whole set of our data unambigously reveals the attractiveness of our method for the fabrication of micro/nano pattern with tuneable dimensions finding potential applications in flexible electronic.