thermotropic liquid crystals
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Langmuir ◽  
2021 ◽  
Author(s):  
Michael Tsuei ◽  
Hao Sun ◽  
Young-Ki Kim ◽  
Xin Wang ◽  
Nathan C. Gianneschi ◽  
...  

Nano Today ◽  
2021 ◽  
Vol 38 ◽  
pp. 101115
Author(s):  
Sikang Wan ◽  
Wei Cong ◽  
Baiqi Shao ◽  
Baiheng Wu ◽  
Qingbin He ◽  
...  

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 214
Author(s):  
Timon Grabovac ◽  
Ewa Gorecka ◽  
Damian Pociecha ◽  
Nataša Vaupotič

The structure of a continuous-grid chiral cubic phase made of achiral constituent molecules is a hot topic in the field of thermotropic liquid crystals. Several structural models have been proposed so far. Resonant X-ray scattering (RXS), which gives information on the molecular orientation in the unit cell, could be applied to select the most appropriate model. We modeled the RXS response for the recently proposed chiral cubic phase structure with an all-hexagon chiral continuous grid. A tensor form factor of a unit cell is constructed, which enables calculation of intensities of peaks for all Miller indices. We find that all the symmetry allowed peaks are resonantly enhanced, and their intensity is much stronger than the intensity of the symmetry forbidden (resonant) peaks. In particular, we predict that a strong resonant enhancement of the symmetry allowed peaks (011) and (002), not observed in a nonresonant scattering, could be observed by RXS at the carbon absorption edge. By RXS at the sulfur absorption edge, one might observe a resonant peak (113) and resonantly enhanced peak (233), and resonant enhancement of all the peaks that are observed in a nonresonant scattering, which probably hide the rest of the predicted resonant peaks.


Nano Express ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 012002
Author(s):  
Adam P Draude ◽  
Ingo Dierking

2021 ◽  
Author(s):  
Weilu Yang ◽  
Dong Liu ◽  
Longfei Luo ◽  
Peiyun Li ◽  
Yun Liu ◽  
...  

A series of tetraphenylporphyrin-based thermotropic liquid crystals containing oligo(dimethylsiloxane) were synthesized. These disc-coil hybrids form ordered nanostructures with periodic sizes on the sub-5 nm scale, including oblique columnar, lamellar, and...


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