[Phys-seminars] 2017-03-27 Condensed Matter Seminar

manassen manassen at bgu.ac.il
Wed Mar 22 11:38:36 IST 2017


Condensed Matter Seminar

 DATE: 27-03-17

 TIME: 11:30

 PLACE: Physics building (#54) room 207

TITLE: 
Non-gradient properties of self-assembled electrolytes: From block co-polymers to ionic liquids

SPEAKER: 
Arik Yochelis, The Jacob Blaustein Institutes for Desert Research.

ABSTRACT/COMMENTS: 
Self-assembly driven by phase separation coupled to Coulombic interactions is fundamental to a wide range of applications, examples of which include soft matter lithography via di-block copolymers, membrane design using poly-electrolytes, and renewable energy applications based on complex nano-materials, such as ionic liquids. However, so far continuum mean-field theories offer only corrections to dilute electrolytes and thus, cannot be exploited to tackle the challenging properties of nano-structuring and mass transport beyond Einstein-Stokes relations. By focusing on two case models, charged polymers and ionic liquids, we show that although charged self-assembly is a gradient system, it surprisingly displays several fundamental features related to far from equilibrium systems, such as multiplicity of spatially localized states and patterning via type-I and II morphological phase transitions at finite wavenumber. Specifically, these insights allow a novel thermodynamically c
 onsistent description (via Onsager\'s energy dissipation relations) for electrolytes that ranges from solvent free to dilute limit.


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