ILCEC Kent e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 X = , ,. CH 3 F F F F Components in LCEs rod-like LC monomers: spacers: (m = 2 or 7) terphenyl transverse rods (TR3):

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... taphenyl transverse rod (TR5): crosslinker: flat-shaped LC monomers: O O O O O O n n X n = 1, 3 or 9 n = 3 or 9 H O O O O 7 7 O O 8 8 e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 Scheme 2: Synthesis of Siloxane-based MCLCE-C11(MeHQ)Si8XL10 as an Example • MCLCEs were synthesized by a modified procedure based on a standard hydrosilylation reaction. Conditions used produced a polydomain film. 4b 2c e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6-50 0 50 100 150 200 Exo Up Temperature (o C) 1 w/g 2nd heating 1st cooling Thermal Behavior (DSC) for C11(MeHQ)Si8XL10 LCE film: g-25SmC104I e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 •SmC mesophase at room temperature in the stretched C11(MeHQ)Si8XL10. Mechanically-induced monodomain-'stable' under zero load WAXD of C11(MeHQ)Si8XL10 0 5 10 15 20 25 30 35 40 45 50 22.2 Å 20.7 Å 41.3 Å (a) unstretched (b) stretched Intensity (a.u.) 2 Theta () 20.7 Å 7.1 Å 4.6 Å 14.0 Å   sin 2d n  Bragg's Law: e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 •Mather (shape memory) •Urayama (slow dynamics) •Watanabe and Hedden (hairpin unfolding) •others e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 Typical Mechanical Properties of a Polydomain LCE-C11(MeHQ)Si8XL10 I. Initial linear region II. Plateau region, polydomain-monodomain (P-M) transition (opaque to transparent) III. Further increase in stress until failing at about 375% strain 0 50 100 150 200 250 300 350 400 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Stress (MPa) Strain (%) I II III (a) (b) P-M transition (a) (b) e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s e l e c t r o n i c-L i q u i d C r y s t a l P r e s e n t a t i o n s h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 h t t p : / / w w w. e-l c. o r g / p r e s e n t a t i o n s / d o c s / 2 0 0 9 _ 1 0 _ 0 2 _ 1 1 _ 3 5 _ 4 6 0 20 40 60 80 100 120 140 160 180 1150 1200 1250 0.0 0.5