Nucleation of filaments of the TGBA phase in free-standing films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00489701" target="_blank" >RIV/68378271:_____/18:00489701 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1080/02678292.2017.1307465" target="_blank" >http://dx.doi.org/10.1080/02678292.2017.1307465</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/02678292.2017.1307465" target="_blank" >10.1080/02678292.2017.1307465</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nucleation of filaments of the TGBA phase in free-standing films

Popis výsledku v původním jazyce

A model of filament nucleation in the twist grain boundary A (TGBA) phase in free-standing smectic films is proposed. It is based on a concept of finite blocks of parallel smectic layers forming a helical structure in the interior of a film. In our model, the blocks resemble twin-like domains in smectic-A liquid crystal. The blocks are mediated to surrounding smectic layers in film either continuously (coherent twin boundary) or discontinuously via dislocation loops wrapping up blocks. Edge components of dislocation loops form incoherent twin boundary. Screw components forming twist grain boundary connect neighbour blocks among themselves. Nucleation of TGBA filament in a film is treated using a simplified model based on isotropic smectic-A elastic theory. Discussion showed that filaments can be nucleated just below the transition temperature from the isotropic to the TGBA phase under slow temperature decrease. The nucleation of dislocation loops is possible due to low compression modulus of material which can be expected just below the transition temperature.

Název v anglickém jazyce

Nucleation of filaments of the TGBA phase in free-standing films

Popis výsledku anglicky

A model of filament nucleation in the twist grain boundary A (TGBA) phase in free-standing smectic films is proposed. It is based on a concept of finite blocks of parallel smectic layers forming a helical structure in the interior of a film. In our model, the blocks resemble twin-like domains in smectic-A liquid crystal. The blocks are mediated to surrounding smectic layers in film either continuously (coherent twin boundary) or discontinuously via dislocation loops wrapping up blocks. Edge components of dislocation loops form incoherent twin boundary. Screw components forming twist grain boundary connect neighbour blocks among themselves. Nucleation of TGBA filament in a film is treated using a simplified model based on isotropic smectic-A elastic theory. Discussion showed that filaments can be nucleated just below the transition temperature from the isotropic to the TGBA phase under slow temperature decrease. The nucleation of dislocation loops is possible due to low compression modulus of material which can be expected just below the transition temperature.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/GA15-02843S" target="_blank" >GA15-02843S: Hybridní a kompozitní systémy založené na mesogenních látkách a nanočásticích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Liquid Crystals

ISSN

0267-8292

e-ISSN

—

Svazek periodika

45

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

173-179

Kód UT WoS článku

000425784500001

EID výsledku v databázi Scopus

2-s2.0-85016129138