Light-Induced Formation of Dynamic and Permanent Surface Topologies in Chiral–Nematic Polymer Networks

2012 ◽  
Vol 45 (19) ◽  
pp. 8005-8012 ◽  
Author(s):  
Danqing Liu ◽  
Cees W. M. Bastiaansen ◽  
Jaap M. J. den Toonder ◽  
Dirk J. Broer
Keyword(s):  
Polymer Networks ◽  
Chiral Nematic ◽  
Nematic Polymer

scholarly journals Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant

1999 ◽  
Vol 85 (11) ◽  
pp. 7517-7521 ◽  
Author(s):  
Peter van de Witte ◽  
Edda E. Neuteboom ◽  
Martin Brehmer ◽  
Johan Lub
Keyword(s):  
Polymer Films ◽  
Twist Angle ◽  
Chiral Nematic ◽  
Nematic Polymer

scholarly journals Modeling out-of-plane actuation in thin-film nematic polymer networks: From chiral ribbons to auto-origami boxes via twist and topology

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Vianney Gimenez-Pinto ◽  
Fangfu Ye ◽  
Badel Mbanga ◽  
Jonathan V. Selinger ◽  
Robin L. B. Selinger
Keyword(s):  
Thin Film ◽  
Polymer Networks ◽  
And Topology ◽  
Out Of Plane ◽  
Nematic Polymer

Electroluminescent Nematic Polymer Networks with Polarised Emission

2001 ◽  
Vol 364 (1) ◽  
pp. 511-518 ◽  
Author(s):  
Adam Contoret ◽  
Simon Farrar ◽  
Perregrin Jackson ◽  
Stephen M. Kelly ◽  
Sultan Khan ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Nematic Polymer

scholarly journals Localised polymer networks in chiral nematic liquid crystals for high speed photonic switching

2016 ◽  
Vol 119 (18) ◽  
pp. 183106 ◽  
Author(s):  
Chloe C. Tartan ◽  
Patrick S. Salter ◽  
Martin J. Booth ◽  
Stephen M. Morris ◽  
Steve J. Elston
Keyword(s):  
Liquid Crystals ◽  
High Speed ◽  
Nematic Liquid Crystals ◽  
Polymer Networks ◽  
Photonic Switching ◽  
Chiral Nematic

scholarly journals A blend of stretching and bending in nematic polymer networks

Soft Matter ◽  
2020 ◽  
Vol 16 (38) ◽  
pp. 8877-8892
Author(s):  
Olivier Ozenda ◽  
André M. Sonnet ◽  
Epifanio G. Virga
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Polymer Networks ◽  
Nematic Polymer

Nematic polymer networks are (heat and light) activable materials, which combine the features of rubber and nematic liquid crystals.

scholarly journals Sensors: A Printable Optical Time-Temperature Integrator Based on Shape Memory in a Chiral Nematic Polymer Network (Adv. Funct. Mater. 21/2013)

2013 ◽  
Vol 23 (21) ◽  
pp. 2665-2665 ◽  
Author(s):  
Dylan J. D. Davies ◽  
Antonio R. Vaccaro ◽  
Stephen M. Morris ◽  
Nicole Herzer ◽  
Albertus P. H. J. Schenning ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polymer Network ◽  
Chiral Nematic ◽  
Optical Time ◽  
Nematic Polymer ◽  
Time Temperature Integrator

scholarly journals Ridge energy for thin nematic polymer networks

2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Andrea Pedrini ◽  
Epifanio G. Virga
Keyword(s):  
Thin Sheet ◽  
Polymer Network ◽  
Polymer Networks ◽  
Isometric Immersions ◽  
Immersed Surfaces ◽  
Extra Energy ◽  
External Agents ◽  
Spontaneous Deformation ◽  
Nematic Polymer ◽  
Degree Of Order

Abstract Minimizing the elastic free energy of a thin sheet of nematic polymer network among smooth isometric immersions is the strategy purported by the mainstream theory. In this paper, we broaden the class of admissible spontaneous deformations: we consider ridged isometric immersions, which can cause a sharp ridge in the immersed surfaces. We propose a model to compute the extra energy distributed along such ridges. This energy comes from bending; it is shown under what circumstances it scales quadratically with the sheet’s thickness, falling just in between stretching and bending energies. We put our theory to the test by studying the spontaneous deformation of a disk on which a radial hedgehog was imprinted at the time of crosslinking. We predict the number of folds that develop in terms of the degree of order induced in the material by external agents (such as heat and illumination). Graphic Abstract

scholarly journals Ridge approximation for thin nematic polymer networks

2021 ◽  
Vol 129 (18) ◽  
pp. 184701
Author(s):  
Andrea Pedrini ◽  
Epifanio G. Virga
Keyword(s):  
Polymer Networks ◽  
Nematic Polymer
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