Updated view of new liquid-matter ferroelectrics with nematic and smectic orders

Giant, Journal Year: 2024, Volume and Issue: 19, P. 100318 - 100318

Published: July 4, 2024

The recent discovery of liquid-matter ferroelectrics not only opens a door to explore novel polar matter states and properties in the term condensed physics but also provides unprecedented opportunities for developing new liquid crystal materials technologies. progression from ferroelectric nematic phase many other represents remarkable journey emerging soft matter. In this perspective, we briefly introduce latest quick rise advancements that display smectic characteristics. We summarize recently-discovered phases, their physics, potential technological innovations, then give some hints consider critical further exploration. More importantly, seek delve into broader discussions on chemical structure design, underlying physical interactions driving various states, connections range intriguing phenomena.

Language: Английский

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Emerging polymer ferroelectrics with liquid crystalline order

Giant, Journal Year: 2024, Volume and Issue: 18, P. 100257 - 100257

Published: March 31, 2024

For liquid crystals (LCs) and crystalline polymers (LCPs), a chiral smectic C (SmC*) phase has been mandatory for breaking the symmetry achieving ferroelectricity. However, this SmC* leads to rather low spontaneous polarization (Ps, 0.1-5 mC/m2), which limited their usage in various electronic electro-optical applications. In mini-review, we highlight three new types of ferroelectric LCPs with high Ps values reported last decade. The first system refers nematic LCs LCPs. large dipole moment (> 9 Debye or D) oblique molecular shape induce polar packing calamitic nematics. can reach as 40 mC/m2. second example is supramolecular LCP, highly cyano groups core lead structure hexagonal columnar after electric poling. ∼ 20 third utilizes dipolar sulfonyl (dipole 4.5 side chains mesogen-free comb-shaped By combining finely tuned interactions mobile LC order, these comb-like have shown good potential ferroelectricity Ps. These will enable applications future.

Language: Английский

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The role of fluorine substituents on the formation of the ferroelectric nematic phase

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 20, 2024

We report on a series of materials which exhibit range nematic phases including the rare example single compound shows both enantiotropic N X and F phases.

Language: Английский

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Spontaneous Twist of Ferroelectric Smectic Blocks in Polar Fluids

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

In soft matter, the polar orientational order of molecules can facilitate coexistence structural chirality and ferroelectricity. The ferroelectric nematic (NF) state, exhibited by achiral calamitic with large dipole moments, serves as an ideal model for emergence spontaneous chirality. This chiral ground state arises from a left- or right-handed twist polarization due to depolarization effects. contrast, smectic characterized lamellar structure lower symmetry, experiences significantly higher energy associated layer-twisting deformations formation domain walls, thus avoiding continuously twisted layered structure. this study, two types (BOE-NO2 DIOLT) are reported that possess different molecular structures but exhibit NF-ferroelectric phase sequence. It is demonstrated NF inherited in phases BOE-NO2, which features larger moments steric hindrance moiety, thereby triggering blocks.

Language: Английский

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Reactive Fluid Ferroelectrics: A Gateway to the Next Generation of Ferroelectric Liquid Crystalline Polymer Networks

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Herein it is reported the first examples of reactive mesogenic materials (RMs) which exhibit fluid ferroelectric order based on recently discovered nematic (N F ) phase. These N RMs and they provide steps toward next generation liquid crystalline polymer networks termed. The chemical synthesis characterization properties these reported, demonstrating that have lowest longitudinal molecular dipole moments (µ) any material 7.39 D. It go to demonstrate a potential use case this new class through stabilization matrix exhibits phase, increasing phase range from 75 120 °C. herein are an exciting step forward in crystal research, achievable, allowing for future development networks, elastomers polymers.

Language: Английский

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Biocompatible Piezoelectric Elastomer for Self-Powered Electronics

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: June 5, 2025

Piezoelectric elastomers suit the body's curvature and flexibility, making them promising for biomedicine, but they must be biocompatible tissue contact. Traditional piezoelectric ceramics are rigid toxic, synthetic polymers, despite their often require harmful organic reagents in fabrication, posing risks to biological safety. To attain a harmonious balance among biocompatibility, piezoelectricity, elasticity, we designed elastomer by combining HOCH2(CF2)3CH2OH (HFPD) with waterborne polyurethane (WPU) matrix. Both HFPD WPU biocompatible, use of water preparation ensures This exhibits excellent superior performance without poling, maintains high output even at 200% tensile strain. Our work offers simple yet effective strategy elastic materials. approach holds promise advancing biomedical materials wearable power sources.

Language: Английский

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Review of emergent polar liquid crystals from material aspects

Liquid Crystals Reviews, Journal Year: 2024, Volume and Issue: 12(2), P. 149 - 194

Published: July 2, 2024

Language: Английский

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