Low-Temperature Structural Study of Smectic CA* Glass by X‑ray Diffraction
Aleksandra Deptuch, Marcin Kozieł, Marcin Piwowarczyk, Magdalena Urbańska, Ewa Juszyńska-Gałązka
TL;DR
This paper studies the structural properties of a smectic CA* glass using X-ray diffraction at low temperatures.
Contribution
The study provides new insights into the temperature-dependent structural behavior of smectic CA* glass below the glass transition.
Findings
The smectic layer spacing and electron density distribution change slowly with temperature below the glass transition.
The specific volume's temperature dependence shifts well below the glass transition temperature.
Short-range order and helix pitch remain constant in the glassy state.
Abstract
The liquid crystalline compound, forming the glass of the smectic CA* phase, is investigated by X-ray diffraction in the 18–298 K range. The characteristic distances within the smectic CA* phase are determined, and the specific volume is estimated. The electron density profile along the smectic layer normal is inferred and compared with the results of the density functional theory calculations. Observations of the selective reflection of the visible light investigate the helical ordering within the smectic CA* glass. The results indicate slow change with temperature of the smectic layer spacing, intermolecular distances, and electron density distribution below the glass transition temperature. The change in the temperature dependence of the specific volume is well below the glass transition temperature. Meanwhile, the relative range of the short-range order within the smectic layers and…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsGlass properties and applications · Liquid Crystal Research Advancements · Phase-change materials and chalcogenides