Liquid Crystals Reviews最新文献

On the origin of the ferroelectric ordering in nematic liquid crystals and the electrostatic properties of ferroelectric nematic materials 向列液晶中铁电有序的起源和铁电向列材料的静电特性

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2024-06-03 DOI: 10.1080/21680396.2024.2360391

M.A. Osipov

引用次数: 0

Splay-bend elastic inequalities shape tactoids, toroids, umbilics, and conic section walls in paraelectric, twist-bend, and ferroelectric nematics 副电、扭转弯曲和铁电线性中的伸展弯曲弹性不等式形状触面、环面、脐带和圆锥截面壁

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2024-03-13 DOI: 10.1080/21680396.2024.2314305

Oleg D. Lavrentovich

引用次数: 0

Imperfect Defects in Smectics A Smectics中的不完美缺陷

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2023-02-15 DOI: 10.1080/21680396.2023.2181880

Y. Nastishin, C. Meyer

引用次数: 2

Les vertus des défauts: The scientific works of the late Mr Maurice Kleman analysed, discussed and placed in historical context, with particular stress on dislocation, disclination and other manner of local material disbehaviour Les vertus des dsamuts:已故Maurice Kleman先生的科学著作分析、讨论和放置在历史背景下，特别强调错位、歧视和其他方式的当地物质行为失调

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-09-04 DOI: 10.1080/21680396.2022.2115417

T. Sluckin

引用次数: 1

Exotic structures of a thin film of chiral liquid crystals: A numerical study based on the Landau-de Gennes theory 手性液晶薄膜的奇异结构:基于朗多-德-热纳理论的数值研究

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-06-10 DOI: 10.1080/21680396.2022.2077256

J. Fukuda

{"title":"Exotic structures of a thin film of chiral liquid crystals: A numerical study based on the Landau-de Gennes theory","authors":"J. Fukuda","doi":"10.1080/21680396.2022.2077256","DOIUrl":"https://doi.org/10.1080/21680396.2022.2077256","url":null,"abstract":"Chiral liquid crystals exhibit various intriguing ordered structures arising from helical distortions of the orientational order allowed by chirality. We present our numerical studies on such exotic structures of chiral liquid crystals, particularly focusing on those in a thin film whose thickness is on the order of or smaller than the characteristic helical pitch of the liquid crystal. We first review the Landau–de Gennes continuum theory we use in our calculations, in which the orientational order is described by a second-rank tensor and the free energy of a liquid crystal is given as a functional of . We show that a thin film of a chiral liquid crystal can exhibit a diverse variety of ordered structures involving topological line defects (disclination lines), depending on film thickness, temperature, and type of surface anchoring (normal, planar, and planar degenerate). Such exotic structures include a hexagonal lattice of Skyrmions, a whirl-like localized structure that finds in its place in a wide variety of condensed matter systems. A thin film of a chiral liquid crystal thus provides an interesting platform for the investigation of exotic structures of orientational order arising from the frustration between the bulk ordering and the spatial confinement with surface anchoring.","PeriodicalId":18087,"journal":{"name":"Liquid Crystals Reviews","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42302397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Defects in Bent-core Liquid Crystals 弯芯液晶中的缺陷

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-06-10 DOI: 10.1080/21680396.2022.2086932

A. Jákli, Y. Nastishin, O. Lavrentovich

引用次数: 4

One-dimensional patterns and topological defects in smectic liquid crystal films 近晶液晶薄膜中的一维图案和拓扑缺陷

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-05-16 DOI: 10.1080/21680396.2022.2076748

B. Zappone, E. Lacaze

{"title":"One-dimensional patterns and topological defects in smectic liquid crystal films","authors":"B. Zappone, E. Lacaze","doi":"10.1080/21680396.2022.2076748","DOIUrl":"https://doi.org/10.1080/21680396.2022.2076748","url":null,"abstract":". Smectic liquid crystals exhibit a remarkable ability to self-organize into a variety of textures, patterns, and arrays extending over large surface areas with microscale periodicity. These structures provide a useful platform for the bottom-up fabrication of microdevices and functional materials, such as microlens arrays and nanoparticle templates. Periodic structures appear in response to a conflict of director alignment created within the smectic film by external fields such as hybrid (planar-homeotropic) anchoring conditions at the film interfaces or an electric field applied normal to the surface anchoring direction. In this article, we review the formation, structure, and applications of one-dimensional (1d) patterns obtained in response to a director bend, typically induced by unidirectional hybrid anchoring conditions in thin films or under applied electric fields. Compared to lattices of focal conic, 1d patterns harbor an unusual array of topological defects, including disclination and dislocation lines, grain boundaries, and curvature walls, running along periodically spaced and bend-free cylindrical stacks of smectic layers. These defects, most of which have been described by Maurice Kleman, appear to drive the structural evolution of 1d patterns as a function of the film thickness. Under unidirectional hybrid anchoring, the defects are oriented perpendicular to the planar anchoring direction and provide highly anisotropic templates for building ordered networks of close-packed nanoparticles. Moreover, the array formation at the transition from the nematic to the smectic phase is intimately connected to the smectic phase frustration by bend distortions, producing an “intermediate” smectic with partial penetration of the bend distortion through undercooled nematic domains","PeriodicalId":18087,"journal":{"name":"Liquid Crystals Reviews","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46774195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Entanglements and Whitehead Products: Generalizing Kleman's Construction to Higher-Dimensional Defects 缠结和Whitehead积:将Kleman构造推广到高维缺陷

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-03-14 DOI: 10.1080/21680396.2022.2067257

G. P. Alexander, R. Kamien

引用次数: 2

Manipulation of mechanically nanopatterned line defect assemblies in plane-parallel nematic liquid crystals 平面平行向列液晶中机械纳米化线缺陷组装的操纵

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-02-16 DOI: 10.1080/21680396.2022.2042745

Saša Harkai, G. Cordoyiannis, Adam L. Susser, Bryce S. Murray, A. Ferris, B. Rožič, Z. Kutnjak, C. Rosenblatt, S. Kralj

{"title":"Manipulation of mechanically nanopatterned line defect assemblies in plane-parallel nematic liquid crystals","authors":"Saša Harkai, G. Cordoyiannis, Adam L. Susser, Bryce S. Murray, A. Ferris, B. Rožič, Z. Kutnjak, C. Rosenblatt, S. Kralj","doi":"10.1080/21680396.2022.2042745","DOIUrl":"https://doi.org/10.1080/21680396.2022.2042745","url":null,"abstract":"Topological line defects are ubiquitous in nature and appear at all physical scales, including in condensed matter systems, nuclear physics, and cosmology. Particularly useful systems to study line defects are nematic liquid crystals (LCs), where they describe singular or nonsingular frustrations in orientational order and are referred to as disclinations. In nematic LCs, line defects could be relatively simply created, manipulated, and observed. We consider cases where disclinations are stabilized either topologically in plane-parallel confinements or by chirality. In the former case, we report on studies in which defect core transformations are investigated, the intriguing dynamics of strength disclinations in LCs exhibiting negative dielectric anisotropy, and stabilization and manipulation of assemblies of defects. For the case of chiral nematics, we consider nanoparticle-driven stabilization of defect lattices. The resulting line defect assemblies could pave the way to several applications in photonics, sensitive detectors, and information storage devices. These excitations, moreover, have numerous analogs in other branches of physics. Studying their universal properties in nematics could deepen understanding of several phenomena, which are still unresolved at the fundamental level.","PeriodicalId":18087,"journal":{"name":"Liquid Crystals Reviews","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48342730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Review: Hopfions, heliknotons, skyrmions, torons and both abelian and nonabelian vortices in chiral liquid crystals 综述:手性液晶中的Hopfions、heliknoton、skyrmions、torons以及阿贝尔和非阿贝尔涡旋

IF 5.1 3区材料科学

Liquid Crystals Reviews Pub Date : 2022-02-10 DOI: 10.1080/21680396.2022.2040058

Jingyan Wu, I. Smalyukh

引用次数: 23