Liquid Crystals, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17
Published: Oct. 30, 2024
Language: Английский
Science, Journal Year: 2024, Volume and Issue: 384(6700), P. 1096 - 1099
Published: June 6, 2024
Spontaneous mirror symmetry breaking by formation of chiral structures from achiral building blocks and emergent polar order are phenomena rarely observed in fluids. Separately, they have both been found certain nematic liquid crystalline phases; however, never simultaneously. Here, we report a heliconical arrangement molecules the ferroelectric phase. The phase is thus spontaneously chiral. Notably, pitch structure comparable to wavelength visible light, giving selective reflection controllable temperature or application weak electric field. Despite bearing resemblance twist-bend phase, this arises electrical interactions that induce noncollinear orientation dipoles.
Language: Английский
Citations
35
Advanced Science, Journal Year: 2024, Volume and Issue: 11(39)
Published: Aug. 5, 2024
Abstract Ferroelectric nematic liquid crystals (N F LCs) are distinguished by their remarkable polarization characteristics and diverse physical phenomena, sparking significant interest excitement within the scientific community. To date, over 150 N LC molecules developed; however, there no reports regarding straight linear polar with a parallel alignment of permanent dipole moment molecular axis. The mesogen nBOE exhibits an enantiotropic phase wide temperature window (up to 100 K) despite having longer alkyl chain n = 6) than critical length conventional models. Interestingly, medium‐length displays exotic sequence – HC –SmX during elimination positional displacement among adjacent molecules. Furthermore, reflective color modulation entire VIS‐NIR spectral regime ultralow E ‐field 0.14 V µm −1 ) is demonstrated.
Language: Английский
Citations
13
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
Citations
10
Advanced Science, Journal Year: 2023, Volume and Issue: 11(9)
Published: Dec. 21, 2023
Freestanding slender fluid filaments of room-temperature ferroelectric nematic liquid crystals are described. They stabilized either by internal electric fields bound charges formed due to polarization splay or external voltage applied between suspending wires. The phenomenon is similar those observed in dielectric fluids, such as deionized water, except that materials the voltages required three orders magnitudes smaller and aspect ratio much higher. threads not only unique novel but also offer measurements basic physical quantities, viscosity. Ferroelectric may have practical applications nano-fluidic micron-size logic devices, switches, relays.
Language: Английский
Citations
20
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Aug. 20, 2024
Ferroelectric nematic liquid crystals are fluids exhibiting spontaneous electric polarization, which is coupled to their long range orientational order. Due inherent property of making bound and surface charges, the free ferroelectric nematics becomes unstable in fields. Here we show that bridges between two electrode plates undergo distinct interfacial instabilities. In a specific frequency voltage, fluid move as active interacting particles resembling living organisms like swarming insects, microbes or microrobots. The motion accompanied by sound emission, consequence piezoelectricity electrostriction. Statistical analysis reveals movement can be controlled applied implies possible application system new types microfluidic devices.
Language: Английский
Citations
8
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 23, 2024
Abstract Manipulating light is an important area of optical research and development. To that end, tunable dichroic devices in which the reflectivity at differing wavelengths can be adjusted, are particularly valuable. This work motivated by recent studies properties chiral ferroelectric nematic liquid crystals (FNLCs). Here electro‐optical presented on two room temperature, FNLC materials demonstrate electrically when subject to a field below 0.2 V µm −1 . Moreover, under appropriate conditions, also (and reversibly) tuned (without change color) from 0% 40%. Reversible, low voltage mirrors, having miniscule power consumption operable around ambient temperature expected useful diverse applications ranging energy‐saving, smart windows virtual reality interfaces.
Language: Английский
Citations
4
Journal of Molecular Liquids, Journal Year: 2025, Volume and Issue: unknown, P. 127525 - 127525
Published: April 1, 2025
Language: Английский
Citations
0
Giant, Journal Year: 2025, Volume and Issue: unknown, P. 100356 - 100356
Published: April 1, 2025
Language: Английский
Citations
0
Soft Matter, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Experimental studies on a five-ring ester-difluoromethoxy linked ferroelectric nematic liquid crystal.
Language: Английский
Citations
0
Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
We report a structure–property relationship in sulfur-based thermotropic ferroelectric nematic (N F ) materials.
Language: Английский
Citations
2