News Release on Liquid Crystals Research: August-2018

New Quantum Liquid Crystals May Play Role In Future Of Computers

Physicists at the Institute for Quantum info and Matter at Caltech have discovered the primary three-dimensional quantum liquid crystal—a new state of matter that will have applications in ultrafast quantum computers of the long run.

“We have detected the existence of a basically new state of matter that may be thought to be a quantum analog of a liquid,” says Caltech professor of physics David Hsieh, a scientist on a replacement study describing the findings within the Gregorian calendar month twenty-one issue of Science. “There area unit varied categories of such quantum liquid crystals that may, in theory, exist; thus, our finding is probably going the tip of Associate in Nursing iceberg.” [1]

Morphology, electro-optical and dielectric properties of polymer network liquid crystals in visible wavelengths

The correlations among electrical, optical properties and compound morphologies of compound network liquid crystals (PNLCs) made with varied natural action parameters square measure investigated. The experimental results indicate that top actinic ray natural action intensity, low natural action temperature and high monomer-dopant concentration cut back the sizes of liquid (LC) domains, thereby decreasing field-off reaction time and light-weight scattering and increasing part retardation of the PNLC cells. Photoinitiator concentration affects the LC domain size furthermore. let’s say, increase in photoinitiator concentration leads to the acceleration of chemical change and so decreases LC domain size. [2]

Phosphorylation status of peptide monolayers modulates hydrogen bonding and orientations of nematic liquid crystals

We report on the angular orientations of nematic liquid crystals (LCs) on monolayers of dipeptides and tripeptides containing amino acid (C) and either aminoalkanoic acid (Y), aminoalkanoic acid (S) or essential amino acid (T). Measurements performed with 5CB and TL205 (with and while not doping with trimethylamine), and dipeptide monolayers within which we have a tendency to remove the –OH teams of CY, CS or CT, junction rectifier America to conclude that element bonding powerfully influences LC orientations on CY however not Cs or CT monolayers. Chemical force research and cyclic voltammetry support the hypothesis that intra-monolayer element bonding inside monolayers of Cs and CT happens preferentially to element bonding with 5CB. [3]

On the blue phase structure of hydrogen-bonded liquid crystals via 19 F NMR

19F NMR spectra square measure simulated for blue phase I of FPHG(St*1.5Ap1.5) supported a model of a double-twisted substructure within cylinders that kind a body-centered cuboidal lattice. A kinetic matrix is enclosed to explain jump processes over quarter pitch lengths. tho’ the lines within the NMR spectra square measure broad and plain, changes within the widths and positions with temperature square measure well delineated by the blue section model structure. The spectra in the chiral nematic N∗ phase are also simulated. [4]

HETERONUCLEAR DIPOLAR DECOUPLING IN THE NMR SPECTROSCOPY OF SOLIDS AND LIQUID CRYSTALS USING A SHORTER SWf-TPPM SEQUENCE WITH PHASE INCREMENTAL ALTERATION AND SUPERCYCLING

SWf-TPPM primarily based decoupling sequences will be applied to get rid of heteronuclear spin interactions in liquid crystals and solids. Here we tend to gift a decoupling theme for heteronuclear couple decoupling in aeolotropic systems developed by reducing the quantity of pulse pairs within the parent SWf-TPPM. The tangential sweep of pulse duration is maintained within the sequence with a section progressive alteration followed by supercycling. [5]

Reference

[1] New Quantum Liquid Crystals May Play Role In Future Of Computers

(web link)

[2] Morphology, electro-optical and dielectric properties of polymer network liquid crystals in visible wavelengths

Hsu CJ, Gu ZH, Wu CC, Huang CY. Morphology, electro-optical and dielectric properties of polymer network liquid crystals in visible wavelengths. Liquid Crystals. 2018 Aug 24:1-0. (web link)

[3] Phosphorylation status of peptide monolayers modulates hydrogen bonding and orientations of nematic liquid crystals

Abbasi R, Wang C, Bai Y, Abbott NL. Phosphorylation status of peptide monolayers modulates hydrogen bonding and orientations of nematic liquid crystals. Liquid Crystals. 2018 Aug 25:1-6. (web link)

[4] On the blue phase structure of hydrogen-bonded liquid crystals via 19 F NMR

Dong RY, Michal CA, Saccone M, Spengler M, Wölper C, Giese M. On the blue phase structure of hydrogen-bonded liquid crystals via 19F NMR. Chemical Physics Letters. 2018 Aug 24. (web link)

[5] HETERONUCLEAR DIPOLAR DECOUPLING IN THE NMR SPECTROSCOPY OF SOLIDS AND LIQUID CRYSTALS USING A SHORTER SWf-TPPM SEQUENCE WITH PHASE INCREMENTAL ALTERATION AND SUPERCYCLING

CYRIL AUGUSTINE1*
1Department of Chemistry, St. Berchmans College Campus, Mahatma Gandhi University, Kottayam, Kerala, 686101, India. (web link)

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