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Ekaterina E Romanova et al.
Journal of magnetic resonance (San Diego, Calif. : 1997), 196(2), 110-114 (2008-11-14)
Pulsed field gradient (PFG) NMR and magic-angle spinning (MAS) NMR have been combined in order to measure the diffusion coefficients of liquid crystals in confined geometry. Combination of MAS NMR with PFG NMR has a higher spectroscopic resolution in comparison
Zongdai Liu et al.
Soft matter, 15(28), 5638-5643 (2019-06-28)
For nematic liquid crystals (LCs), a disclination line is formed when the director of the LCs changes abruptly. In this study, we demonstrate an approach to form dynamic disclination lines by flowing the nematic liquid crystal 4-cyano-4'-pentylbiphenyl (5CB) in rectangular
Burak Akdeniz et al.
Macromolecular rapid communications, 40(15), e1900160-e1900160 (2019-06-12)
Liquid crystals (LC), when combined with photolithography, enable synthesis of microparticles with 2D and 3D shapes and internal complexities. Films of nematic LCs are prepared using mixtures of reactive (RM257) and non-reactive mesogens with controlled alignment of LCs at the
Ana T S Semeano et al.
Food control, 89, 72-76 (2018-03-06)
As consumption of fish and fish-based foods increases, non-destructive monitoring of fish freshness also becomes more prominent. Fish products are very perishable and prone to microbiological growth, not always easily detected by organoleptic evaluation. The analysis of the headspace of
Yining Han et al.
Physical chemistry chemical physics : PCCP, 19(36), 24955-24960 (2017-09-07)
Design and fabrication of many next-generation liquid crystal (LC)-based devices rely on nematic LC domains in the form of drops or emulsions. In addition to surfactants, solid nanoparticles may be used to stabilize LC-in-water Pickering emulsions, possibly adding new dimensions
Zeinab Rouhbakhsh et al.
Talanta, 206, 120246-120246 (2019-09-14)
We develop a novel label-free liquid crystal (LC) aptasensor based on intrinsic properties of nematic LCs for ultra-sensitive detection of tetracycline. The aptasensor is assembled by immobilizing aptamers onto the glass slide modified with both homeotropic alignment and silane coupling
M Conradi et al.
Optics express, 18(2), 500-506 (2010-02-23)
We present an experimental analysis of different equilibrium orientations and light driven transformations of Janus particles in the nematic liquid crystal 5CB. Depending on the preparation technique of homeotropic (DMOAP) and planar (Au) hemispheres we have observed two types of
W Gwizdała et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 79(4), 701-704 (2010-09-25)
The ultrathin film of mesogenic molecules 5CB confined between graphene walls has been investigated by molecular dynamics (MD) technique. The dynamical observables of 4-cyano-4-n-pentylbiphenyl (5CB) were calculated for several temperatures: the mean square displacement, translational and angular velocity autocorrelation function
Myeonghun Song et al.
Scientific reports, 7(1), 2630-2630 (2017-06-03)
Ultrasensitive flexible sensors with multi-sensing functions are required for various applications in flexible electronics era. Here we demonstrate flexible polymer-dispersed liquid crystal (PDLC)-integrated-organic field-effect transistors (OFETs) (PDLC-i-OFETs), which sensitively respond to various stimulations including weak gas (air) flow, direct physical
Hua Zhao et al.
Optics express, 19(13), 12496-12502 (2011-07-01)
By depositing a nanoscale photoconductive layer on a stable photorefractive (PR) polymeric film, consisting of the polymer poly[N-vinylcarbazole] (PVK) doped with 4,4'-n-pentylcyanobiphenyl (5CB) and C60, both the response rate and beam coupling properties were improved greatly. Systematic measurements and observations
Abdelmonem Jemal et al.
Optics express, 21(2), 1541-1546 (2013-02-08)
We present the inscription of a Light Induced Self-Written (LISW) waveguide in a 4-cyano-4'-pentylbipheny (5CB) doped photopolymer. The dynamic reorientation of the 5CB molecules in the material under applied electric field leads to birefringence in LISW waveguide and thus allows
Qiong-Zheng Hu et al.
The Analyst, 137(22), 5204-5207 (2012-10-02)
In this study, we demonstrate a new strategy to image biomolecular events through interactions between liquid crystals (LCs) and oil-in-water emulsions. The optical response had a dark appearance when a nematic LC, 4-cyano-4'-pentylbiphenyl (5CB), is in contact with emulsion droplets
Wilma du Chatinier et al.
Journal of chromatography. A, 1439, 167-172 (2016-01-29)
Food emulsifiers are widely used to stabilise water-fat emulsions such as mayonnaise and dressings. They are prepared by oligomerisation of a poly-alcohol (as e.g. glycerol or citric acid) followed by a reaction with fatty acids. In order to gain insight
Jianhua Zou et al.
Langmuir : the ACS journal of surfaces and colloids, 26(10), 7025-7028 (2009-12-17)
Liquid-crystal 4-n-pentyl-4'-cyanobiphenyl (5CB) droplets dispersed in aqueous solution are prepared by the assembly of poly(styrenesulfonic acid) (PSSH) and poly(styrenesulfonate sodium) (PSSNa) at the 5CB/water interface. The micrometer sized PSSH-coated 5CB droplets in the space confinement formed by two parallel glass
Lie Na Tan et al.
Langmuir : the ACS journal of surfaces and colloids, 28(15), 6364-6376 (2012-03-01)
We report that specific binding of ligand-functionalized (biotinylated) phospholipid vesicles (diameter = 120 ± 19 nm) to a monolayer of proteins (streptavidin or anti-biotin antibody) adsorbed at an interface between an aqueous phase and an immiscible film of a thermotropic
Bohdan Senyuk et al.
Nature communications, 7, 10659-10659 (2016-02-13)
Outermost occupied electron shells of chemical elements can have symmetries resembling that of monopoles, dipoles, quadrupoles and octupoles corresponding to filled s-, p-, d- and f-orbitals. Theoretically, elements with hexadecapolar outer shells could also exist, but none of the known
Manuel Hertzog et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 23(72), 18166-18170 (2017-11-21)
We experimentally demonstrate a fine control over the coupling strength of vibrational light-matter hybrid states by controlling the orientation of a nematic liquid crystal. Through an external voltage, the liquid crystal is seamlessly switched between two orthogonal directions. Using these
A Véron et al.
Physical review. E, Statistical, nonlinear, and soft matter physics, 86(5 Pt 1), 051708-051708 (2012-12-12)
This work describes an investigation of the static (or quasistatic) nuclear magnetic resonance (NMR) response in a nematic liquid crystal confined between two planar conducting plates and subject to a magnetic field and an electric field produced by a difference
Waliullah Khan et al.
Lab on a chip, 12(21), 4553-4559 (2012-09-12)
4-cyano-4'-pentylbiphenyl (5CB) microdroplets coated with PAA-b-LCP were successfully made via microfluidics. Their functionalized interfaces were examined for lysozyme and bovine serum albumin detection, which could be easily visualized with an optical microscope under crossed polarizers by the radial-to-bipolar configurational change
A V Zakharov et al.
The Journal of chemical physics, 132(22), 224906-224906 (2010-06-17)
Dynamic field pumping principle has been developed utilizing the interactions of both the director and velocity fields and temperature-redistribution across a two-dimensional (2D) homogeneously aligned liquid crystal (HALC) film under the influence both of a heat flow directed normal to
Active Control of the Anchoring of 4`-Pentyl-4-cyanobiphenyl (5CB) at an Aqueous?Liquid Crystal Interface By Using a Redox-Active Ferrocenyl Surfactant
Brake JM, et al.
Langmuir, 19 (21), 8629?8637-8629?8637 null
An ultrasensitive platform for PCB77 detection: New strategy for liquid crystal-based aptasensor fabrication.
Verdian, et al.
Journal of Hazardous Materials, 402, 123531-123531 (2021)
V S Oganesyan et al.
Physical review letters, 102(1), 013005-013005 (2009-03-05)
We report simulation of EPR spectra directly and entirely from trajectories generated from molecular dynamics simulations. Results are reported for a model 3beta-DOXYL-5alpha-cholestane spin probe in a coarse-grained solvent representing a 5CB nematic host. The results are in excellent agreement
Burak Akdeniz et al.
Journal of colloid and interface science, 574, 11-19 (2020-04-17)
Particles dispersed in liquid crystals (LCs) have been shown to assemble due to the elastic interactions arising from the molecular anisotropy. Studies have shown that the alignment of the particles within LCs were strongly dependent on the surface director of
Hui Ma et al.
Colloids and surfaces. B, Biointerfaces, 173, 178-184 (2018-10-08)
A simple, low-cost and label-free strategy for detecting lithocholic acid (LCA) was designed at the liquid crystals (LCs)/aqueous interface via competitive host-guest inclusion. In this method, sodium dodecyl sulfate (SDS) was initially adsorbed on the fluid interface and induced LCs
Lay Min Lee et al.
The journal of physical chemistry. B, 110(32), 15782-15790 (2006-08-11)
The surface-induced alignment and electrooptical (EO) dynamics of a 50-nm-thick liquid crystalline (4-n-pentyl-4'-cyanobiphenyl; 5CB) film were studied at three temperatures: 25 and 33 degrees C (near the crystalline-nematic and nematic-isotropic transition temperatures, respectively) and 29 degrees C (a median temperature
Haifa Jeridi et al.
Proceedings of the National Academy of Sciences of the United States of America, 112(48), 14771-14776 (2015-11-11)
Directed and true self-assembly mechanisms in nematic liquid crystal colloids rely on specific interactions between microparticles and the topological defects of the matrix. Most ordered structures formed in thin nematic cells are thus based on elastic multipoles consisting of a
Tetiana Orlova et al.
Nature communications, 6, 7603-7603 (2015-07-07)
Topology is a universal concept that is encountered in daily life and is known to determine many static and dynamical properties of matter. Taming and controlling the topology of materials therefore constitutes a contemporary interdisciplinary challenge. Building on the controllable
Bruno F B Silva et al.
Langmuir : the ACS journal of surfaces and colloids, 31(14), 4361-4371 (2014-11-15)
In this work we investigate the interplay between flow and boundary condition effects on the orientation field of a thermotropic nematic liquid crystal under flow and confinement in a microfluidic device. Two types of experiments were performed using synchrotron small-angle
Yu Xia et al.
Advanced materials (Deerfield Beach, Fla.), 28(43), 9637-9643 (2016-10-08)
Two-dimensional liquid-crystal elastomer (LCE) sheets with preprogrammed topological defects are prepared by aligning liquid-crystal monomers within micropatterned epoxy channels, followed by photopolymerization. Upon heating, the LCE films form various three-dimensional structures in agreement with theoretical design. The miniaturized LCE actuators
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