Ziauddin Ahmed

TL;DR: In this paper, the formation of arrays of focal conic defects (FCDs) was studied in the twist-bend nematic, Ntb, phase, and some of the focal conics exhibit submicron internal structure with 8nm periodicity, which is very close to that found in the crystalline phase of the material.

TL;DR: In this paper, it was shown that some of the focal conics show submicron internal structure with 8 nm periodicity, which is very close to that found in the crystalline phase of the material, suggesting surface freezing.

TL;DR: It is proposed that on further heating their low bend angle allows the transition to the normal nematic phase, where the molecules can freely move longitudinally, without the need to perform screw-like motion as in the Ntb phase.

TL;DR: In this article, the twist-bend nematic phase (Ntb) was studied by the resonant scattering of hard X-rays and by conventional small and wide-angle X-ray scattering (SAXS, WAXS).

TL;DR: The higher temperature nematic phase was found to exhibit an anomaly of the bend elastic constant similar to that of the dimers with N-Ntb phase sequence, and the physical properties of the low-temperature nematics phase are similar to those of the known Ntb materials.