Ultra-short helix pitch and spiral ordering in cholesteric liquid crystal revealed by resonant soft X-ray scattering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00556090" target="_blank" >RIV/68378271:_____/22:00556090 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0330468" target="_blank" >http://hdl.handle.net/11104/0330468</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d1sm01543e" target="_blank" >10.1039/d1sm01543e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultra-short helix pitch and spiral ordering in cholesteric liquid crystal revealed by resonant soft X-ray scattering

Popis výsledku v původním jazyce

The spontaneous formation of chiral structures offers a variety of liquid crystals phases that could be further tailored for practical applications. In our work, the characteristic features of spiral ordering in the cholesteric phase of compound EZL10/10 were evaluated. To disclose resonant reflections related to a nanoscale helix pitch, resonant soft X-ray scattering at the carbon K edge was employed. The angular positions of the observed scattering peaks reveal a half-pitch of the spiral ordering 52 nm indicating the full pitch of about 104 nm at room temperature. No scattering peaks were detectable in the isotropic phase at higher temperatures. The broadening of the peaks points to a presence of coherently scattering domains formed by cholesteric spirals with lengths of about five pitches. The characteristic lengths extracted from the resonant soft X-ray scattering experiment agree well with the periodicity observed in the cholesteric phase by means of atomic force microscopy.

Název v anglickém jazyce

Ultra-short helix pitch and spiral ordering in cholesteric liquid crystal revealed by resonant soft X-ray scattering

Popis výsledku anglicky

The spontaneous formation of chiral structures offers a variety of liquid crystals phases that could be further tailored for practical applications. In our work, the characteristic features of spiral ordering in the cholesteric phase of compound EZL10/10 were evaluated. To disclose resonant reflections related to a nanoscale helix pitch, resonant soft X-ray scattering at the carbon K edge was employed. The angular positions of the observed scattering peaks reveal a half-pitch of the spiral ordering 52 nm indicating the full pitch of about 104 nm at room temperature. No scattering peaks were detectable in the isotropic phase at higher temperatures. The broadening of the peaks points to a presence of coherently scattering domains formed by cholesteric spirals with lengths of about five pitches. The characteristic lengths extracted from the resonant soft X-ray scattering experiment agree well with the periodicity observed in the cholesteric phase by means of atomic force microscopy.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LTC19051" target="_blank" >LTC19051: Samouspořádané molekulární systémy omezené geometrií povrchu vzorku</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Soft Matter

ISSN

1744-683X

e-ISSN

1744-6848

Svazek periodika

18

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

89-96

Kód UT WoS článku

000726857100001

EID výsledku v databázi Scopus

2-s2.0-85121773955