Magnetic Alignment of the Chiral Nematic Phase of a Cellulose Microfibril Suspension

Langmuir ◽  
2005 ◽  
Vol 21 (5) ◽  
pp. 2034-2037 ◽  
Author(s):  
Fumiko Kimura ◽  
Tsunehisa Kimura ◽  
Moritaka Tamura ◽  
Asako Hirai ◽  
Masaya Ikuno ◽  
...  
Keyword(s):  
Nematic Phase ◽  
Cellulose Microfibril ◽  
Magnetic Alignment ◽  
Chiral Nematic

scholarly journals Self-ordered cellulose nanocrystals and microscopic investigations

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
C.F. Castro-Guerrero ◽  
A.B. Morales-Cepeda ◽  
M.R. Díaz-Guillén ◽  
F. Delgado-Arroyo ◽  
F.A. López-González
Keyword(s):  
Cellulose Nanocrystals ◽  
Self Assembly ◽  
Nematic Phase ◽  
Average Length ◽  
Periodic Change ◽  
Local Orientation ◽  
Preferred Direction ◽  
Self Assembling ◽  
Chiral Nematic ◽  
Assembly Structure

Abstract Cellulose nanocrystals were extracted from cotton. The cellulose nanocrystals made a self-assembly structure when dried under slow conditions, as it was revealed by the characterization made to the material. The AFM images of the nanocrystals showed that they had a changing local orientation, pointing in a preferred direction that underwent a periodic change. This periodic change resembles the orientation of a chiral nematic phase. The TEM images showed that the nanocrystals had a rod-like appearance with average length size of 98.5 nm and a diameter of 4.7 nm. The TEM characterization showed the nanocrystals with more details than AFM. In this paper, the self-assembling of CNC was observed by AFM, and further investigations were done by TEM, deconvoluting the process of CNC nanorods aggregation.

PBLG as a versatile liquid crystalline medium for anisotropic NMR data acquisition

2019 ◽  
Vol 55 (30) ◽  
pp. 4327-4330 ◽  
Author(s):  
Ikenna E. Ndukwe ◽  
Xiao Wang ◽  
István Pelczer ◽  
Mikhail Reibarkh ◽  
R. Thomas Williamson ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Solvent System ◽  
High Quality ◽  
Nmr Data ◽  
Chiral Nematic ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

The chiral nematic phase of poly-γ-benzyl-l-glutamate (PBLG) formed in a chloroform–DMSO co-solvent system can be used as a versatile alignment medium for the acquisition of high quality anisotropic NMR data for molecules of varying polarities.

Electroclinic effect around a smectic A-chiral nematic phase transition

2002 ◽  
Vol 29 (9) ◽  
pp. 1251-1251
Author(s):  
C. L. Folcia ◽  
J. Ortega ◽  
J. Etxebarria
Keyword(s):  
Phase Transition ◽  
Nematic Phase ◽  
Smectic A ◽  
Chiral Nematic

Sign reversal of the linear electro‐optic effect in the chiral nematic phase

1994 ◽  
Vol 76 (6) ◽  
pp. 3762-3768 ◽  
Author(s):  
L. Komitov ◽  
S. T. Lagerwall ◽  
B. Stebler ◽  
A. Strigazzi
Keyword(s):  
Nematic Phase ◽  
Sign Reversal ◽  
Chiral Nematic ◽  
Electro Optic

Achiral H-shaped liquid crystals exhibiting an electric-field-induced chiral nematic phase

2019 ◽  
Vol 7 (23) ◽  
pp. 6905-6913 ◽  
Author(s):  
Shoumi Sayama ◽  
Atsushi Yoshizawa
Keyword(s):  
Liquid Crystals ◽  
Electric Field ◽  
Nematic Phase ◽  
Nematic Liquid Crystals ◽  
Chiral Nematic

Newly designed achiral H-shaped nematic liquid crystals exhibit an electric-field-induced chiral nematic phase showing domains with opposite helical senses.

Sign Reversal of the Dielectric Anisotropy in the Chiral Nematic Phase of a Copolysiloxane

2002 ◽  
Vol 372 (1) ◽  
pp. 217-227 ◽  
Author(s):  
C. Cesarino ◽  
L. Komitov ◽  
G. Galli ◽  
E. Chiellini
Keyword(s):  
Nematic Phase ◽  
Dielectric Anisotropy ◽  
Sign Reversal ◽  
Chiral Nematic

Effects of the preparing condition of a polymer-stabilised liquid crystal with a smectic-A−chiral nematic phase transition on its properties

2009 ◽  
Vol 36 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Guohui Pan ◽  
Yubo Cao ◽  
Renwei Guo ◽  
Huicong Cheng ◽  
Zhou Yang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Nematic Phase ◽  
Smectic A ◽  
Chiral Nematic
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