523 citations · 2.1k across the 25 of their papers we have counts for
25 papers
Fully-chromophoric ferroelectric nematics for electronic electro-optics
Xi Chen, Andrew Bradfield, Chirag Patel +7
Electronic electro-optic (EEO) phase modulation is a key emerging technology for the chip-scale inter-conversion of signals between the electronic and photonic domains. The recent…
An active hydroelastic liquid crystal phase of a fluttering ferroelectric nematic
Xi Chen, Cory Pecinovsky, Eva Korblova +5
Polarization flutter, produced by an applied AC electric field drives an equilibrium ferroelectric nematic () liquid crystal (LC) through a transition into a dissipat…
Freely Suspended Nematic and Smectic Films and Free-Standing Smectic Filaments in the Ferroelectric Nematic Realm
Keith G. Hedlund, Vikina Martinez, Xi Chen +4
We show that stable, freely suspended liquid crystal films can be made from the ferroelectric nematic () phase and from the recently discovered polar, lamellar $\math…
Thermotropic reentrant isotropy and antiferroelectricity in the ferroelectric nematic realm: Comparing RM734 and DIO
Bingchen Zhong, Min Shuai, Xi Chen +6
The current intense study of ferroelectric nematic liquid crystals was initiated by the observation of the same ferroelectric nematic phase in two independently discovered organic…
Thermotropic reentrant isotropy and antiferroelectricity in the ferroelectric nematic material RM734
Xi Chen, Min Shuai, Bingchen Zhong +6
We report a transition from the ferroelectric nematic liquid crystal () phase to a lower-temperature, antiferroelectric fluid phase having reentrant isotropic symmetry ()…
Topological defect coarsening in quenched smectic-C films analyzed using artificial neural networks
Ravin A. Chowdhury, Adam A. S. Green, Cheol S. Park +2
Mechanically quenching a thin film of smectic-C liquid crystal results in the formation of a dense array of thousands of topological defects in the director field. The subsequent r…
Dielectric spectroscopy of ferroelectric nematic liquid crystals: Measuring the capacitance of insulating interfacial layers
Noel A. Clark, Xi Chen, Joseph E. Maclennan +1
Numerous measurements of the dielectric constant of the recently discovered ferroelectric nematic () liquid crystal (LC) phase report extraordinarily large values of $ε^\p…
Observation of a uniaxial ferroelectric smectic A phase
Xi Chen, Vikina Martinez, Pierre Nacke +12
We report the smectic , a new liquid crystal phase of the ferroelectric nematic realm. The smectic is a phase of small polar, rod-shaped molecules which form two-dimensi…
Antiferroelectric Smectic Ordering as a Prelude to the Ferroelectric Nematic:Introducing the Smectic Phase
Xi Chen, Vikina Martinez, Eva Korblova +9
We have structurally characterized the liquid crystal phase that appears as an intermediate state when a dielectric nematic, having polar disorder of its molecular dipoles, transit…
Ideal Mixing of Paraelectric and Ferroelectric Nematic Phases in Liquid Crystals of Distinct Molecular Species
Xi Chen, Zhecong Zhu, Mitchell J. Magrini +6
The organic mesogens RM734 and DIO are members of separate molecular families featuring distinct molecular structures. These families, at the present time, are the only ones known…
Detection of Islands and Droplets on Smectic Films Using Machine Learning
Eric Hedlund, Keith Hedlund, Adam Green +4
Machine learning techniques have been developed to identify inclusions on the surface of freely suspended smectic liquid crystal films imaged by reflected light microscopy. The exp…
Polar In-Plane Surface Orientation of a Ferroelectric Nematic Liquid Crystal: Polar Monodomains and Twisted State Electro-Optics
Xi Chen, Eva Korblova, Matthew A. Glaser +3
We show that surface interactions can vectorially structure the three-dimensional polariza-tion field of a ferroelectric fluid. The contact between a ferroelectric nematic liquid c…
Coalescence of Islands in Freely-Suspended Smectic Films
Z. H. Nguyen, K. Harth, A. M. Goldfain +4
Smectic liquid crystal films a few molecular layers thick that are freely suspended in air are used as a model system to study the coalescence of fluids in two dimensions. High-spe…
First-Principles Experimental Demonstration of Ferroelectricity in a Thermotropic Nematic Liquid Crystal: Spontaneous Polar Domains and Striking Electro-Optics
Xi Chen, Eva Korblova, Dengpan Dong +8
We report the experimental determination of the structure and response to applied electric field of the lower-temperature nematic phase of the previously reported calamitic compoun…
Experimental Studies of Two-dimensional Laminar Jet Flows in Freely Suspended Liquid Crystal Films
Kyle R. Ferguson, Evan Dutch, Zhiyuan Qi +7
Two dimensional (2D) laminar jet-----a stream of fluid that projected into a surrounding medium with the flow confined in 2D-----has both theoretical and experimental significance.…
Realization of hydrodynamic experiments on quasi-2D liquid crystal films in microgravity
Noel A. Clark, Alexey Eremin, Matthew A. Glaser +9
Freely suspended films of smectic liquid crystals are unique examples of quasi two-dimensional fluids. Mechanically stable and with quantized thickness of the order of only a few m…
Double-Helical Tiled Chain Structure of the Twist-Bend Liquid Crystal phase in CB7CB
Michael R. Tuchband, Min Shuai, Keri A. Graber +16
The twist-bend nematic liquid crystal phase is a three-dimensional fluid in which achiral bent molecules spontaneously form an orientationally ordered macroscopically chiral helico…
Resonant carbon K-edge soft x-ray scattering from lattice-free heliconical molecular ordering: soft dilative elasticity of the twist-bend liquid crystal phase
Chenhui Zhu, Michael R. Tuchband, Anthony Young +7
Resonant x-ray scattering shows that the bulk structure of the twist-bend liquid crystal phase, recently discovered in bent molecular dimers, has spatial periodicity without electr…
The twist-bend nematic phase of bent mesogenic dimer CB7CB and its mixtures
Michael R. Tuchband, Min Shuai, Keri A. Graber +12
Binary mixtures of the twist-bend nematic-forming liquid crystal CB7CB with the prototypical rod-like liquid crystal 5CB exhibit a twist-bend nematic phase with properties similar…
Spontaneous Liquid Crystal and Ferromagnetic Ordering of Colloidal Magnetic Nanoplates
Min Shuai, Arthur Klittnick, Yongqiang Shen +10
Ferrofluids are familiar as colloidal suspensions of ferromagnetic nanoparticles in aqueous or organic solvents. The dispersed particles are randomly oriented but their moments bec…
Experimental Realization of an Incompressible Newtonian Fluid in Two Dimensions
Zhiyuan Qi, Cheol Soo Park, Matthew A. Glaser +2
The Brownian diffusion of micron-scale inclusions in freely suspended smectic A liquid crystal films a few nanometers thick and several millimeters in diameter depends strongly on…
Mutual diffusion of inclusions in freely-suspended smectic liquid crystal films
Zhiyuan Qi, Zoom Hoang Nguyen, Cheol Soo Park +5
We study experimentally and theoretically the hydrodynamic interaction of pairs of circular inclusions in two-dimensional, fluid smectic membranes suspended in air. By analyzing th…
Twist-bend heliconical chiral nematic liquid crystal phase of an achiral rigid bent-core mesogen
Dong Chen, Michi Nakata, Renfan Shao +8
The chiral, heliconical (twist-bend) nematic ground state is reported in an achiral, rigid, bent-core mesogen (UD68). Similar to the nematic twist-bend (NTB) phase observed in bent…
A Twist-Bend Chiral Helix of 8nm Pitch in a Nematic Liquid Crystal of Achiral Molecular Dimers
Dong Chen, Jan H. Porada, Justin B. Hooper +8
Freeze Fracture Transmission Electron Microscopy (FFTEM) study of the nanoscale structure of the so-called "twist-bend" nematic (NX) phase of the cyanobiphenyl (CB) dimer molecule…