Reference : Micrometer-Scale Porous Buckling Shell Actuators Based on Liquid Crystal Networks
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/37744
Micrometer-Scale Porous Buckling Shell Actuators Based on Liquid Crystal Networks
English
Jampani, Venkata mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Mulder, Dirk mailto [Technical University of Eindhoven]
Reguengo de Sousa, Kevin mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Gélébart, Anne-Hélène mailto [Technical University of Eindhoven]
Lagerwall, Jan mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Schenning, Albertus P.H.J. mailto []
5-Jun-2018
Advanced Functional Materials
John Wiley & Sons
28
31
1801209
Yes (verified by ORBilu)
International
1616-301X
1616-3028
Weinheim
United Kingdom
[en] buckling ; liquid crystal elastomer actuators ; microfluidics ; spherical topology
[en] Micrometer‐scale liquid crystal network (LCN) actuators have potential for application areas like biomedical systems, soft robotics, and microfluidics. To fully harness their power, a diversification in production methods is called for, targeting unconventional shapes and complex actuation modes. Crucial for controlling LCN actuation is the combination of macroscopic shape and molecular‐scale alignment in the ground state, the latter becoming particularly challenging when the desired shape is more complex than a flat sheet. Here, one‐step processing of an LCN precursor material in a glass capillary microfluidic set‐up to mold it into thin shells is used, which are stretched by osmosis to reach a diameter of a few hundred micrometers and thickness on the order of a micrometer, before they are UV crosslinked into an LCN. The shells exhibit radial alignment of the director field and the surface is porous, with pore size that is tunable via the osmosis time. The LCN shells actuate reversibly upon heating and cooling. The decrease in order parameter upon heating induces a reduction in thickness and expansion of surface area of the shells that triggers continuous buckling in multiple locations. Such buckling porous shells are interesting as soft cargo carriers with capacity for autonomous cargo release.
European Commission - EC
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/37744
10.1002/adfm.201801209
H2020 ; 648763 - INTERACT - Intelligent Non-woven Textiles and Elastomeric Responsive materials by Advancing liquid Crystal Technology
FnR ; FNR11703329 > Venkata Subba Rao Jampani > TRENDSETTER > Template-free Reconfigurable Nematic Defect-arrays for designing Self-organisable Topological Three-dimensional Elastomer responsive-Rafts > 15/11/2017 > 14/10/2020 > 2017

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