Phase Separation and Liquid Crystal Self-Assembly in Surfactant−Inorganic−Solvent Systems

Langmuir ◽  
2003 ◽  
Vol 19 (6) ◽  
pp. 2049-2057 ◽  
Author(s):  
Flor R. Siperstein ◽  
Keith E. Gubbins
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Self Assembly ◽  
Solvent Systems

scholarly journals Phase Analysis of the Cellulose Triacetate-Nitromethane System

2012 ◽  
Vol 2012 ◽  
pp. 1-12
Author(s):  
Anna B. Shipovskaya ◽  
Natalia O. Gegel ◽  
Sergei L. Shmakov ◽  
Sergei Yu. Shchyogolev
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Light And Electron Microscopy ◽  
State Diagram ◽  
Cellulose Triacetate ◽  
Cellulose Ester ◽  
Turbidity Spectrum ◽  
Solvent Systems ◽  
Liquid Liquid Phase Separation ◽  
Comprehensive Study

A comprehensive study was made on the cellulose triacetate-nitromethane system to explore its phase separation within ranges 2–25 wt.% and−5÷+80°Cby means of polarization light and electron microscopy, the turbidity spectrum method, differential thermal and X-ray analyses, and rheological techniques. The physical state of the polymer was identified within the phase coexistence boundaries on the phase diagram which included three types of phase separation (amorphous (with a UCST atTcr=57∘Candccr=7.3 wt.%), crystal, and liquid crystal). The boundaries of the regions determining the coexistence of the liquid crystal (LC) and the partly crystal phase were found to be inside the region of amorphous liquid-liquid phase separation. For cellulose ester-solvent systems, this state diagram is the first experimental evidence for the possibility of coexistence of several phases with amorphous, LC, and crystal polymer ordering.

Self-assembly of polymer droplets in a nematic liquid crystal at phase separation

2008 ◽  
Vol 77 (4) ◽  
Author(s):  
Kosuke Kita ◽  
Masatoshi Ichikawa ◽  
Yasuyuki Kimura
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Nematic Liquid Crystal ◽  
Self Assembly

A Comparative Study of the Phase Separation of a Nematic Liquid Crystal in the Self-assembling Drying Protein Drops

MRS Advances ◽  
2019 ◽  
Vol 4 (22) ◽  
pp. 1309-1314 ◽  
Author(s):  
Anusuya Pal ◽  
Amalesh Gope ◽  
Germano S. Iannacchione
Keyword(s):  
Liquid Crystal ◽  
Phase Separation ◽  
Self Assembly ◽  
Intensity Variation ◽  
The Self ◽  
Drying Process ◽  
Bright Region ◽  
Self Assembling ◽  
Initial Aqueous Solution ◽  
Significant Difference

ABSTRACTThe drying process, self-assembly of the proteins and the phase separation of a thermotropic liquid crystal (LC) from an initial aqueous solution represent a rich area of study. A focus of this work is to compare the behavior of two different proteins, bovine serum albumin [BSA] and lysozyme [Lys] in the ternary system through optical microscopy. During the drying process, the intensity profile shows three regimes in the presence of LC whereas no intensity variation is observed in its absence in both protein drops. The striking outcome is the presence of an umbilical defect of [+1] strength in every domain near the edge of BSA drop, whereas, each domain has a central dark region surrounded by a bright region in the dried Lys drop. Finally, the crack spacing in the dried Lys drop is reduced in the presence of LC whereas, no significant difference is found in the dried BSA drop.

Phase separation of a nematic liquid crystal in the self-assembly of lysozyme in a drying aqueous solution drop

2019 ◽  
Vol 9 (01) ◽  
pp. 150-158 ◽  
Author(s):  
Anusuya Pal ◽  
Amalesh Gope ◽  
Rumani Kafle ◽  
Germano S. Iannacchione
Keyword(s):  
Aqueous Solution ◽  
Liquid Crystal ◽  
Phase Separation ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
The Self ◽  
Image Position

Abstract

Reversible microscale assembly of nanoparticles driven by the phase transition of a thermotropic liquid crystal

2017 ◽  
Author(s):  
Niamh Mac Fhionnlaoich ◽  
Stephen Schrettl ◽  
Nicholas B. Tito ◽  
Ye Yang ◽  
Malavika Nair ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Self Assembly ◽  
Nematic Phase ◽  
Hierarchical Control ◽  
Building Blocks ◽  
Model System ◽  
Microscopic Level ◽  
Reversible Process ◽  
Thermotropic Liquid Crystal

The arrangement of nanoscale building blocks into patterns with microscale periodicity is challenging to achieve via self-assembly processes. Here, we report on the phase transition-driven collective assembly of gold nanoparticles in a thermotropic liquid crystal. A temperature-induced transition from the isotropic to the nematic phase leads to the assembly of individual nanometre-sized particles into arrays of micrometre-sized aggregates, whose size and characteristic spacing can be tuned by varying the cooling rate. This fully reversible process offers hierarchical control over structural order on the molecular, nanoscopic, and microscopic level and is an interesting model system for the programmable patterning of nanocomposites with access to micrometre-sized periodicities.

scholarly journals Orientational self-assembly of nanoparticles in nematic droplets

2021 ◽  
Author(s):  
Natália Tomašovičová ◽  
Marianna Batkova ◽  
Ivan Batko ◽  
Veronika Lacková ◽  
Vlasta Zavišová ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Self Assembly

The interplay between the anchoring of liquid crystal (LC) molecules at the substrate and at the surface of nanoparticles (NPs) results in an orientational self-assembly of nanoparticles in sessile nematic droplets.

1,2,3-Triazole lamellar liquid crystal and its non-covalent palladium complex dimer: structure, mesomorphism and self-assembly properties

2021 ◽  
pp. 1-13
Author(s):  
Meihao Xia ◽  
Yao Chen ◽  
Ziran Chen ◽  
Wenhao Yu ◽  
Haomin Cheng ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Self Assembly ◽  
Palladium Complex ◽  
Lamellar Liquid Crystal ◽  
Dimer Structure
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