Fission of quasi-static dissipative solitons in chiral nematics

IF 5.4 1区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

GIANT Pub Date : 2024-06-22 DOI:10.1016/j.giant.2024.100312

Jian-Zhou Lin , Ao-Jie Wu , Li-Ting Zhu , Ke-Hui Wu , Sen-Sen Li , Lu-Jian Chen

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Abstract

Dissipative solitons in liquid crystals (LCs) are represented by three-dimensional solitary waves of director deformation called directrons. The only one exception on the quasi-static counterparts of directrons has ever been observed in achiral nematics. In this work, quasi-static solitons and their fission are identified in chiral nematics. The structure, distribution and fission of quasi-static solitons are closely related to the pitch of samples. The critical pitch is about 7.0 µm for LC cells with thickness of ∼10.0 µm. Quasi-static solitons are transformed from directrons by stepping down voltage to facilitate locating solitons. Successive two-soliton fission with increasing fission time occurs for all quasi-static solitons in samples of relatively larger pitches. Multi-soliton fission is also found in some quasi-static solitons when the voltage is stepped up back to the directron domain, leaving behind a region that can modify the trajectories of surrounding directrons. The fission of quasi-static solitons in chiral nematics has predictable fission location, adjustable fission time, and controllable fission number, may acting as an excellent model system for studying general principles of soliton fission in nonlinear systems.

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手性线粒体中准静态耗散孤子的裂变

液晶（LC）中的耗散孤子由称为直子的三维孤子波表示。在非手性线粒体中观察到的唯一例外是指向子的准静态对应物。本研究确定了手性线性方程中的准静态孤子及其裂变。准静态孤子的结构、分布和裂变与样品的间距密切相关。厚度为 10.0 微米的 LC 单元的临界间距约为 7.0 微米。准静态孤子是通过降低电压从直子转化而来的，以便于定位孤子。在间距相对较大的样品中，随着裂变时间的增加，所有准静态孤子都会发生连续的双孤子裂变。当电压升高回到直子域时，一些准静态孤子也会发生多孤子裂变，留下的区域会改变周围直子的轨迹。手性线粒体中准静态孤子的裂变具有可预测的裂变位置、可调节的裂变时间和可控制的裂变数量，可作为研究非线性系统中孤子裂变一般原理的绝佳模型系统。

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来源期刊

GIANT Multiple-

CiteScore

8.50

自引率

8.60%

发文量

审稿时长

42 days

期刊介绍： Giant is an interdisciplinary title focusing on fundamental and applied macromolecular science spanning all chemistry, physics, biology, and materials aspects of the field in the broadest sense. Key areas covered include macromolecular chemistry, supramolecular assembly, multiscale and multifunctional materials, organic-inorganic hybrid materials, biophysics, biomimetics and surface science. Core topics range from developments in synthesis, characterisation and assembly towards creating uniformly sized precision macromolecules with tailored properties, to the design and assembly of nanostructured materials in multiple dimensions, and further to the study of smart or living designer materials with tuneable multiscale properties.