J
Joonwoo Jeong
Researcher at Ulsan National Institute of Science and Technology
Publications - 30
Citations - 786
Joonwoo Jeong is an academic researcher from Ulsan National Institute of Science and Technology. The author has contributed to research in topics: Liquid crystal & Lyotropic. The author has an hindex of 12, co-authored 26 publications receiving 619 citations. Previous affiliations of Joonwoo Jeong include University of Pennsylvania & KAIST.
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Chiral symmetry breaking and surface faceting in chromonic liquid crystal droplets with giant elastic anisotropy.
Joonwoo Jeong,Zoey S. Davidson,Peter J. Collings,Peter J. Collings,Tom C. Lubensky,Arjun G. Yodh +5 more
TL;DR: This work explores the interplay of giant elastic anisotropy and geometrical frustration imposed by boundary conditions in droplets, demonstrating spontaneous formation in the nematic phase of chiral patterns from achiral building blocks and of central line defects and surface faceting in the columnar phase.
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Chiral structures from achiral liquid crystals in cylindrical capillaries
TL;DR: The experiments explore fundamental questions about how chiral configurations of LCs can arise from achiral building blocks and show archetypally how simple boundary conditions and elastic anisotropy of confined materials lead to multiple symmetry breaking and how these broken symmetry breaking combine to create a variety of defects.
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Chiral structures and defects of lyotropic chromonic liquid crystals induced by saddle-splay elasticity.
Zoey S. Davidson,Louis Kang,Joonwoo Jeong,Tim Still,Peter J. Collings,Tom C. Lubensky,Arjun G. Yodh +6 more
TL;DR: An experimental and theoretical study of lyotropic chromonic liquid crystals confined in cylinders with degenerate planar boundary conditions elucidates LCLC director configurations and observes point defects between opposite-handed domains, and explains a preference for point defects over domain walls.
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Polarization holographic microscopy for extracting spatio-temporally resolved Jones matrix
TL;DR: Employing the principle of common-path interferometry, PHM quantitatively measures the spatially resolved Jones matrix components of anisotropic samples with only two consecutive measurements of spatially modulated holograms.
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Liquid crystal Janus emulsion droplets: preparation, tumbling, and swimming
Joonwoo Jeong,Adam Gross,Wei-Shao Wei,Fuquan Tu,Daeyeon Lee,Peter J. Collings,Peter J. Collings,Arjun G. Yodh +7 more
TL;DR: LC Janus droplets with remarkable optical properties and dynamical behaviors thus offer new avenues for applications of Janus colloids and active soft matter.