Surface ordering near the smectic-A-smectic-C transition in thin, free-standing, liquid-crystal films

1997 ◽  
Vol 84 (3) ◽  
pp. 522-524 ◽  
Author(s):  
V. K. Dolganov ◽  
E. I. Demikhov ◽  
R. Fouret ◽  
C. Gors
Keyword(s):  
Liquid Crystal ◽  
Free Standing ◽  
Surface Ordering ◽  
Liquid Crystal Films ◽  
Smectic A ◽  
Smectic C ◽  
Crystal Films

Smectic C to smectic A transition induced mechanically by the rupture of freely suspended liquid crystal films

Soft Matter ◽  
2017 ◽  
Vol 13 (17) ◽  
pp. 3199-3204 ◽  
Author(s):  
Torsten Trittel ◽  
Kirsten Harth ◽  
Ralf Stannarius
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Films ◽  
Smectic A ◽  
Smectic C ◽  
Crystal Films ◽  
Freely Suspended

CHARACTERIZATION SEVERAL NOVEL PHASE TRANSITIONS IN A UNIQUE LOWER DIMENSION SYSTEM OF FREE-STANDING LIQUID-CRYSTAL FILMS

1996 ◽  
Vol 10 (07) ◽  
pp. 269-277 ◽  
Author(s):  
A.J. JIN ◽  
M. VEUM ◽  
C.F. CHOU ◽  
J.T. HO ◽  
V. SURENDRANATH ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Wetting Transition ◽  
Layer By Layer ◽  
Free Standing ◽  
Crystal Sample ◽  
Liquid Crystal Films ◽  
Smectic A ◽  
Phase Sequence ◽  
Crystal Films ◽  
Clearing Temperature

Motivated by the defect-mediated two-stage melting theory, extensive experiments have been concluded on free-standing films of a liquid-crystal sample which exhibits the isotropic-smectic-A–hexatic B-crystal-B bulk phase sequence. For a two-layer film, which is virtually two-dimensional, our calorimetric measurement shows an apparently divergent anomaly near the smectic-A-hexatic-B transition. Its anomaly has a dominant fluctuation contribution and can be fitted to a power law with an exponent α≈0.37±0.05, in disagreement with the theoretical prediction. Thicker films exhibit surface-initiated layer-by-layer (LBL) wetting transition upon cooling. Moreover, these films also exhibit interesting LBL thinning transitions above the bulk clearing temperature.

Sign in / Sign up

Export Citation Format

Share Document