Titre: ''Single crystals and bespoke textures
in self-assembled soft materials''
Endroit : Pavillon Roger-Gaudry, salle S-142
Heure : 11:00 AM
Hôte : Professeur Chinedum Osuji
Résumé : “Controlling structure and thereby manipulating the use
properties of condensed matter is a central concern in materials
science. A striking disparity exists in our ability to enact such
structural control in self-assembled soft materials, relative to hard
condensed matter systems. In this talk we examine strategies for
directing self-assembly in nanostructured soft materials to create
single crystals and bespoke textures. Our work elucidates physical
processes that are relevant for such directed self-assembly, in
part by leveraging in situ scattering tools, with an overall goal of
exploiting fundamental understanding to create useful materials
or devices. In particular, we consider the use of magnetic fields and
confinement effects for directed self-assembly of soft mesophases
of block copolymers and discotic liquid crystals. The ability to
produce highly ordered functional materials over macroscopic
length scales is demonstrated. We explore the role of alignment
and connectivity in creating materials with highly anisotropic ion
transport, and in creating highly selective nanofiltration membranes
with uniformly aligned nanopores produced by molecular selfassembly.
Application of orthogonal fields, and field processing
across sequential phase transitions enables a novel realization of
macroscopic single crystals of self-assembled mesophases with
precisely specified texture. Recent progress on low field (sub-1 T)
alignment and the associated potential to develop bespoke textures
in block copolymers using local field screening are presented.”
Selected references
-
- 'Chinedum Osuji Bio, Stats, and Results | Olympics at'. Sports-reference.com. Retrieved 2013-02-16.
- Chinedum Osuji (2012-02-10). 'Osuji Lab - Polymer Physics, Complex Fluids and Soft Materials Science: Directed Self Assembly, Supramolecular Polymers, Colloidal Rheology, Microfluidics'. Eng.yale.edu. Retrieved 2013-02-16.
- 'Chinedum Osuji - Yale School of Engineering & Applied Science | Yale School of Engineering & Applied Science'. Seas.yale.edu. 2012-11-30. Retrieved 2013-02-16.
- 'Chinedum Osuji Lab – Just another WordPress site'. osujilab.seas.upenn.edu. Retrieved 2018-07-14.
Courriel : w.skene@umontreal.ca
Numéro de téléphone : 514-340-5174
