A theory of the relative stabilities of the cubic phases of magnesium and calcium oxides

AbstractIn a narrow temperature window in going from the isotropic to highly chiral orders, cholesteric liquid crystals exhibit so-called blue phases, consisting of different morphologies of long, space-filling double twisted cylinders. Those of cubic spatial symmetry have attracted considerable attention in recent years as templates for soft photonic materials. The latter often requires the creation of monodomains of predefined orientation and size, but their engineering is complicated by a lack of comprehensive understanding of how blue phases nucleate and transform into each other at a submicrometer length scale. In this work, we accomplish this by intercepting nucleation processes at intermediate stages with fast cross-linking of a stabilizing polymer matrix. We reveal using transmission electron microscopy, synchrotron small-angle X-ray diffraction, and angle-resolved microspectroscopy that the grid of double-twisted cylinders undergoes highly coordinated, diffusionless transformations. In light of our findings, the implementation of several applications is discussed, such as temperature-switchable QR codes, micro-area lasing, and fabrication of blue phase liquid crystals with large domain sizes.

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Structure formation and properties of WC-(W,Ti)C-Ti(C,N)-TaC-Co gradient cemented carbides with cubic phases free in the surface layer

International Journal of Refractory Metals and Hard Materials ◽

10.1016/j.ijrmhm.2021.105548 ◽

2021 ◽

pp. 105548

Author(s):

Tianen Yang ◽

Kaihua Shi ◽

Xiaoyu Liu ◽

Jiangyan Sang ◽

Xu Xia ◽

...

Keyword(s):

Surface Layer ◽

Structure Formation ◽

Cemented Carbides ◽

Cubic Phases

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Sources and relative stabilities of acylated and nonacylated anthocyanins in beverage systems

Journal of Food Science and Technology ◽

10.1007/s13197-021-05054-z ◽

2021 ◽

Author(s):

Gayan Chandrajith Vidana Gamage ◽

Yau Yan Lim ◽

Wee Sim Choo

Keyword(s):

Relative Stabilities

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Relative stabilities of Si polytypes under biaxial stress: A first-principles study

Physical Review Materials ◽

10.1103/physrevmaterials.5.063402 ◽

2021 ◽

Vol 5 (6) ◽

Author(s):

Reo Kita ◽

Masayuki Toyoda ◽

Susumu Saito

Keyword(s):

First Principles ◽

Biaxial Stress ◽

Relative Stabilities ◽

First Principles Study

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Ab initio density functional theory investigation of the structural, electronic and optical properties of Ca3Sb2 in hexagonal and cubic phases

Journal of Solid State Chemistry ◽

10.1016/j.jssc.2013.09.026 ◽

2013 ◽

Vol 207 ◽

pp. 140-146 ◽

Cited By ~ 1

Author(s):

Borhan Arghavani Nia ◽

Matin Sedighi ◽

Masoud Shahrokhi ◽

Rostam Moradian

Keyword(s):

Density Functional Theory ◽

Optical Properties ◽

Ab Initio ◽

Density Functional ◽

Functional Theory ◽

Electronic And Optical Properties ◽

Cubic Phases

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HYDROGEN BONDING IN DIASTEREOISOMERIC α-β AMINOALCOHOLS: A REINVESTIGATION OF THE EPHEDRINES BY N.M.R

Canadian Journal of Chemistry ◽

10.1139/v60-013 ◽

1960 ◽

Vol 38 (1) ◽

pp. 125-130 ◽

Cited By ~ 10

Author(s):

James B. Hyne

Keyword(s):

Hydrogen Bonding ◽

Polar Solvents ◽

Relative Stabilities ◽

Hydrogen Bonded

The results of an n.m.r. study of the diastereoisomeric ephedrine and ψ-ephedrine molecules in non-polar solvents are interpreted and discussed in terms of the relative stabilities of the intramolecularly hydrogen-bonded conformers.

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