scholarly journals Shape-Dependent Oriented Trapping and Scaffolding of Plasmonic Nanoparticles by Topological Defects for Self-Assembly of Colloidal Dimers in Liquid Crystals

Nano Letters ◽  
2012 ◽  
Vol 12 (2) ◽  
pp. 955-963 ◽  
Author(s):  
Bohdan Senyuk ◽  
Julian S. Evans ◽  
Paul J. Ackerman ◽  
Taewoo Lee ◽  
Pramit Manna ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Topological Defects ◽  
Plasmonic Nanoparticles

scholarly journals Periodic assembly of nanoparticle arrays in disclinations of cholesteric liquid crystals

2017 ◽  
Vol 114 (9) ◽  
pp. 2137-2142 ◽  
Author(s):  
Yunfeng Li ◽  
Elisabeth Prince ◽  
Sangho Cho ◽  
Alinaghi Salari ◽  
Youssef Mosaddeghian Golestani ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Soft Matter ◽  
Cholesteric Liquid Crystal ◽  
Topological Defects ◽  
Spatial Inhomogeneity ◽  
Cholesteric Phase ◽  
Anisotropic Surface ◽  
Linear Defects

An important goal of the modern soft matter science is to discover new self-assembly modalities to precisely control the placement of small particles in space. Spatial inhomogeneity of liquid crystals offers the capability to organize colloids in certain regions such as the cores of the topological defects. Here we report two self-assembly modes of nanoparticles in linear defects-disclinations in a lyotropic colloidal cholesteric liquid crystal: a continuous helicoidal thread and a periodic array of discrete beads. The beads form one-dimensional arrays with a periodicity that matches half a pitch of the cholesteric phase. The periodic assembly is governed by the anisotropic surface tension and elasticity at the interface of beads with the liquid crystal. This mode of self-assembly of nanoparticles in disclinations expands our ability to use topological defects in liquid crystals as templates for the organization of nanocolloids.

Topological defects in liquid crystals as templates for molecular self-assembly

2015 ◽  
Vol 15 (1) ◽  
pp. 106-112 ◽  
Author(s):  
Xiaoguang Wang ◽  
Daniel S. Miller ◽  
Emre Bukusoglu ◽  
Juan J. de Pablo ◽  
Nicholas L. Abbott
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Topological Defects ◽  
Defects In Liquid Crystals

Directed Self-Assembly of Topological Defects of Liquid Crystals

Langmuir ◽  
2018 ◽  
Vol 34 (7) ◽  
pp. 2551-2556 ◽  
Author(s):  
Min Jeong Shin ◽  
Min-Jun Gim ◽  
Dong Ki Yoon
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Topological Defects

scholarly journals Properties of twisted topological defects in 2D nematic liquid crystals

Soft Matter ◽  
2021 ◽  
Author(s):  
Daniel Pearce ◽  
Karsten Kruse
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Topological Defects ◽  
Two Dimensional

Topological defects are one of the most conspicuous features of liquid crystals. In two dimensional nematics, they have been shown to behave effectively as particles with both, charge and orientation,...

Topological liquid crystal superstructures as structured light lasers

2021 ◽  
Vol 118 (49) ◽  
pp. e2110839118
Author(s):  
Miha Papič ◽  
Urban Mur ◽  
Kottoli Poyil Zuhail ◽  
Miha Ravnik ◽  
Igor Muševič ◽  
...  
Keyword(s):  
Self Assembly ◽  
Soft Matter ◽  
Structured Light ◽  
Topological Defects ◽  
Photonic Devices ◽  
Light Polarization ◽  
Self Healing ◽  
Fabry Perot ◽  
Self Assembled ◽  
External Stimuli

Liquid crystals (LCs) form an extremely rich range of self-assembled topological structures with artificially or naturally created topological defects. Some of the main applications of LCs are various optical and photonic devices, where compared to their solid-state counterparts, soft photonic systems are fundamentally different in terms of unique properties such as self-assembly, self-healing, large tunability, sensitivity to external stimuli, and biocompatibility. Here we show that complex tunable microlasers emitting structured light can be generated from self-assembled topological LC superstructures containing topological defects inserted into a thin Fabry–Pérot microcavity. The topology and geometry of the LC superstructure determine the structuring of the emitted light by providing complex three-dimensionally varying optical axis and order parameter singularities, also affecting the topology of the light polarization. The microlaser can be switched between modes by an electric field, and its wavelength can be tuned with temperature. The proposed soft matter microlaser approach opens directions in soft matter photonics research, where structured light with specifically tailored intensity and polarization fields could be designed and implemented.

3D Anhydrous Proton-Transporting Nanochannels Formed by Self-Assembly of Liquid Crystals Composed of a Sulfobetaine and a Sulfonic Acid

2013 ◽  
Vol 135 (41) ◽  
pp. 15286-15289 ◽  
Author(s):  
Bartolome Soberats ◽  
Masafumi Yoshio ◽  
Takahiro Ichikawa ◽  
Satomi Taguchi ◽  
Hiroyuki Ohno ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Sulfonic Acid

scholarly journals Colloidal interactions and unusual crystallization versus de-mixing of elastic multipoles formed by gold mesoflowers

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Ye Yuan ◽  
Mykola Tasinkevych ◽  
Ivan I. Smalyukh
Keyword(s):  
Self Assembly ◽  
Energy Minimization ◽  
Topological Defects ◽  
High Order ◽  
Colloidal System ◽  
Many Body ◽  
Molecular Systems ◽  
Colloidal Interactions ◽  
Many Body Interactions ◽  
Different Order

AbstractColloidal interactions in nematic liquid crystals can be described as interactions between elastic multipoles that depend on particle shape, topology, chirality, boundary conditions and induced topological defects. Here, we describe a nematic colloidal system consisting of mesostructures of gold capable of inducing elastic multipoles of different order. Elastic monopoles are formed by relatively large asymmetric mesoflower particles, for which gravity and elastic torque balancing yields monopole-type interactions. High-order multipoles are instead formed by smaller mesoflowers with a myriad of shapes corresponding to multipoles of different orders, consistent with our computer simulations based on free energy minimization. We reveal unexpected many-body interactions in this colloidal system, ranging from de-mixing of elastic monopoles to a zoo of unusual colloidal crystals formed by high-order multipoles like hexadecapoles. Our findings show that gold mesoflowers may serve as a designer toolkit for engineering colloidal interaction and self-assembly, potentially exceeding that in atomic and molecular systems.

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