4.5 Article

Three Distinct Polar Phases, Isotropic, Nematic, and Smectic-A Phases, Formed from a Fluoro-Substituted Dimeric Molecule with Large Dipole Moment

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Chemistry, Multidisciplinary

Multiple ferroelectric nematic phases of a highly polar liquid crystal compound

Rony Saha et al.

Summary: This work describes the synthesis and physical property measurements of a new compound, RT11001, which exhibits multiple high-polarity ferroelectric nematic phases. Various physical characterization methods are employed to show the different ferroelectric phases of RT11001, including a non-polar nematic fluid phase with non-polar smectic clusters, a transition to another polar nematic phase containing polar positionally ordered clusters, and indications of an additional polar biaxial liquid crystal phase at lower temperatures.

LIQUID CRYSTALS (2022)

Article Chemistry, Physical

Electric Switching Behaviors and Dielectric Relaxation Properties in Ferroelectric, Antiferroelectric, and Paraelectric Smectic Phases of Bent-Shaped Dimeric Molecules

Shigemasa Nakasugi et al.

Summary: This study investigates the electric switching behaviors and dielectric properties of four different liquid crystal phases formed by mixing specific molecules. Each phase exhibits distinct characteristics, including collective or non-collective modes and varying dielectric strengths.

JOURNAL OF PHYSICAL CHEMISTRY B (2022)

Article Chemistry, Physical

Spontaneous Polarization Characteristics in Polar Smectic Phases of Fluoro-Substituted Bent-Shaped Dimeric Molecules

Shigemasa Nakasugi et al.

Summary: This study synthesized three kinds of bent-shaped dimeric molecules by fluorine substitution of C16 molecules and examined the influences of the substitution on polar smectic phases. The fluorine substitution resulted in decreased transition temperatures and faster switching rates, while also affecting molecular anchoring behavior and increasing the dipole moment of the molecules.

JOURNAL OF PHYSICAL CHEMISTRY B (2022)

Article Chemistry, Multidisciplinary

Ferroelectric nematic phase at and below room temperature

Atsutaka Manabe et al.

Summary: The liquid crystal 1 exhibits ferroelectricity at room temperature, with a relative permittivity of over 20000 observed in the ferroelectric nematic phase. It enters the ferroelectric nematic phase directly from the isotropic phase upon cooling, without the formation of a conventional nematic phase.

LIQUID CRYSTALS (2021)

Article Multidisciplinary Sciences

Development of ferroelectric nematic fluids with giant-ε dielectricity and nonlinear optical properties

Jinxing Li et al.

Summary: Researchers have developed superhigh-epsilon fluid materials with high dielectric permittivity, strong second harmonic generation, and macroscopic spontaneous polar ordering through rational molecular design and machine learning analyses. They confirmed that the polar structures are identical for all the synthesized materials and successfully extended this strategy to high-molecular weight systems, creating polar soft matters with spontaneous symmetry breaking.

SCIENCE ADVANCES (2021)

Article Physics, Applied

Strongly temperature dependent ferroelectric switching in AlN, Al1-xScxN, and Al1-xBxN thin films

Wanlin Zhu et al.

Summary: This study reveals the temperature dependence of ferroelectric switching in Al0.84Sc0.16N, Al0.93B0.07N, and AlN thin films, showing strong temperature dependence on polarization reversal and coercive field, while minimal temperature dependence on remanent polarization values. The relative permittivity increased within a certain temperature range, and polarization reversal was confirmed through piezoelectric coefficient analysis and chemical etching. Models based on thermal activation suggest a distribution of pinning sites or nucleation barriers regulates the switching behavior with an average activation energy near 28 meV.

APPLIED PHYSICS LETTERS (2021)

Article Chemistry, Multidisciplinary

Structural variants of RM734 in the design of splay nematic materials

R. J. Mandle et al.

Summary: The recent discovery of the new splay nematic phase, a polar and ferroelectric nematic polymorph, marks a new chapter in the history of liquid crystals with potential transformative applications in photonics, non-linear optics, and memory applications. Significant improvements in existing materials like RM734 are needed to fully utilize the properties of this new state of matter. Mixture formulation shows promise for engineering materials with improved working temperature ranges, despite the difficulty in rationalizing the occurrence of the new nematic variant in designer materials based on molecular properties.

LIQUID CRYSTALS (2021)

Article Materials Science, Multidisciplinary

Huge dielectric constants of the ferroelectric smectic-A phase in bent-shaped dimeric molecules

Shigemasa Nakasugi et al.

Summary: This study explores the dielectric relaxation properties of the ferroelectric SmAP(F) phase formed by bent-shaped dimeric molecules with varying alkyl chain lengths. The phase exhibits a Goldstone-like mode at around 500 Hz and shows significant variation in dielectric strength (Delta epsilon) depending on cell thickness, with values surpassing 7000 in a 50 μm-thick cell.

MATERIALS ADVANCES (2021)

Article Physics, Multidisciplinary

Ferroelectric-Ferroelastic Phase Transition in a Nematic Liquid Crystal

Nerea Sebastian et al.

PHYSICAL REVIEW LETTERS (2020)

Article Multidisciplinary Sciences

First -principles experimental demonstration of ferroelectricity in a thermotropic nematic liquid crystal: Polar domains and striking electro-optics

Xi Chen et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2020)

Review Crystallography

Ferroelectric Liquid Crystals: Physics and Applications

Qi Guo et al.

CRYSTALS (2019)

Article Chemistry, Physical

Ferroelectric Nematic and Ferrielectric Smectic Mesophases in an Achiral Bent-Core Azo Compound

Jitendra Kumar et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2018)

Article Physics, Multidisciplinary

Physics of liquid crystals of bent-shaped molecules

Antal Jakli et al.

REVIEWS OF MODERN PHYSICS (2018)

Article Chemistry, Physical

A nematic to nematic transformation exhibited by a rod-like liquid crystal

Richard J. Mandle et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2017)

Article Chemistry, Multidisciplinary

A Fluid Liquid-Crystal Material with Highly Polar Order

Hiroya Nishikawa et al.

ADVANCED MATERIALS (2017)

Article Chemistry, Multidisciplinary

Rational Design of Rod-Like Liquid Crystals Exhibiting Two Nematic Phases

Richard J. Mandle et al.

CHEMISTRY-A EUROPEAN JOURNAL (2017)

Article Chemistry, Multidisciplinary

Two-Dimensional Skyrmion Lattice Formation in a Nematic Liquid Crystal Consisting of Highly Bent Banana Molecules

Sungmin Kang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2016)

Article Chemistry, Physical

New U-shaped liquid crystals azobenzene derived from catechol for photoswitching properties

Md. Lutfor Rahman et al.

JOURNAL OF MOLECULAR LIQUIDS (2015)

Article Chemistry, Multidisciplinary

Dielectric Behavior in B1 and B2 Phases Composed of Unsymmetrical Bent Shaped Liquid Crystal Molecules

Manoj Marik et al.

MOLECULAR CRYSTALS AND LIQUID CRYSTALS (2015)

Article Chemistry, Physical

The Chirality of a Twist-Bend Nematic Phase Identified by NMR Spectroscopy

Laetitia Beguin et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2012)

Article Chemistry, Multidisciplinary

Methylene-linked liquid crystal dimers and the twist-bend nematic phase

Peter A. Henderson et al.

LIQUID CRYSTALS (2011)

Article Physics, Fluids & Plasmas

Ferroelectric behavior of orthogonal smectic phase made of bent-core molecules

Lingfeng Guo et al.

PHYSICAL REVIEW E (2011)

Article Physics, Fluids & Plasmas

Dielectric properties of mixtures of a bent-core and a calamitic liquid crystal

Peter Salamon et al.

PHYSICAL REVIEW E (2010)

Article Chemistry, Multidisciplinary

Smectic a formation by twin dimers assuming U-shaped conformation

Yu Naito et al.

CHEMISTRY LETTERS (2008)

Article Physics, Applied

Frustrated smectic phase appearing as transitional state between single-layer and antiferroelectric bilayer smectic phases in binary mixtures of dimeric compounds

T Izumi et al.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS (2006)

Article Physics, Applied

Smectic mesophase behavior of dimeric compounds showing antiferroelectricity, frustration and chirality

T Izumi et al.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS (2006)

Review Physics, Applied

Bent-core liquid crystals: Their mysterious and attractive world

H Takezoe et al.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS (2006)

Article Chemistry, Physical

Local structure in nematic and isotropic liquid crystals

NH Phuong et al.

JOURNAL OF CHEMICAL PHYSICS (2003)

Article Chemistry, Multidisciplinary

Liquid crystal phases of achiral banana-shaped molecules: a computer simulation study

R Memmer

LIQUID CRYSTALS (2002)

Article Physics, Applied

Phase diagram for ferroelectric nematic ordering of hard spherocylinders with longitudinal dipoles

CJ Yu et al.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS (2002)

Article Physics, Applied

Electrooptic and dielectric properties in bent-shaped liquid crystals

M Zennyoji et al.

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS (2000)