LIQUID CRYSTALS

Wen-Xiu Wang, Ran Wang, Meng-Shu Li, Xin-Yu Zhang et al.

In this study, a base liquid crystal elastomer (LCE) network was first constructed via a thiol-ene ‘click’ reaction, using pentaerythritol tetra(3-mercaptopropionate) (P’) as the crosslinker and 1,4-phenylene bis(4-(allyloxy)benzoate) (R) as the mesogenic unit. Two contrasting series, P’_xR_yC_z and P’_xR_yB_z, were then developed by respectively incorporating dodec…

Zhenyu Xiong, Tangwu Li, Ming Xiao, Zhiwei Lv et al.

Abstract not available. Bibliographic information is searchable.

Bodar Brijesh, Umed Bhoya

Abstract not available. Bibliographic information is searchable.

Jan Thoen, Mingjun Huang, Yaohao Song, Christ Glorieux

The groundbreaking discovery in 2017 of ferroelectric nematic phases in RM734 and DIO has triggered extensive explorations for new molecules and resulted already in a rich library of polar liquid crystals (LCs). To elucidate the nature of the phase transitions in these novel LCs, high-resolution experimental techniques are necessary. High-resolution adiabatic scanning calorimet…

Xiang Sun, Ran An, Xinye Liao, Shikang Zhang et al.

Abstract not available. Bibliographic information is searchable.

Ahmed F. Darweesh, Silvio Poppe, Mohamed Alaasar

We report the synthesis and mesomorphic characterisation of two unsymmetric dimeric polycatenar mesogens (A1 and A6) incorporating an odd-membered flexible spacer and a 3,4,5-tris(hexyloxy) polycatenar terminus. The dimers were comprehensively characterised for their mesophase behaviour using differential scanning calorimetry (DSC), polarised optical microscopy (POM), and tempe…

Yu-Hang Liu, Fan-Yi Meng, Chang Ding, Huilin Mu et al.

Metasurfaces enable versatile electromagnetic wave manipulation through subwavelength meta-atoms, facilitating compact and multifunctional integration. Current metasurface designs mostly depend on external spatial feed structures, increasing complexity and size. This work proposes a low-profile, guided-wave-driven, liquid-crystal (LC)-based programmable metasurface with dual-ba…

Mohammad S. Rahman, Kiran Agrahari, Nanqi Bao, Trenton J. Wolter et al.

The chemically responsive properties of surface-anchored isothiocyanate-terminated (−NCS) liquid crystal compounds (LCs) have not been investigated before. Therefore, a novel series of terminal alkoxy and fluoroalkoxy tail isothiocyanate liquid crystal compounds was developed that exhibit nematic liquid crystal phase properties near ambient temperature. In order to achieve a lo…

Jifeng Gao, Jiaze Gao, Qin Liu, Xuchu Sun et al.

In this paper, the monomer containing coumarin group was introduced into the chiral liquid crystal polysiloxane system to obtain the polymers (named as CP) with photo reversibility. Then the CP polymer was reacted with the crosslinking agent containing furan ring in the presence of ZnCl2 to produce chiral liquid crystal elastomers (named as ECP). The results of Fourier transfor…

Srinivas J, Krishnaraj S, Manju J, Senthil T S

The growing demand for energy-efficient building technologies has accelerated the development of adaptive smart window systems capable of regulating solar radiation and reducing cooling loads. In this study, a self-powered electro-optic smart window based on plasmonic nanomaterial-enhanced nematic liquid crystal (PNLC) was developed for adaptive thermal and optical regulation. …

Wing-Kit Choi, Cheng-Huan Hsu, Cheng-Chieh Wang, Jin-Yi Lin

A half-shifted dual-electrode parallel-aligned fringe-field switching (PA-FFS) liquid crystal device is proposed. The effects of electrode configuration and cell gap on electric-field distribution, molecular rotation behaviour, transmittance, and response time are investigated using three-dimensional numerical simulations. The results show that thinner cell gaps provide higher …

Piotr Harmata, Milena Jeżak, Natan Rychłowicz, Jakub Herman

A series of novel sexiphenyl liquid crystals featuring terminal pentyl chains and lateral alkyl/fluoro substituents were synthesised via a palladium-catalysed route using novel 2,4-dialkylphenyl boronic esters. Compounds exhibited stable nematic mesophases, with lateral substitution reducing clearing points by 300–380°C versus unsubstituted sexiphenyl – with methylated compound…

Yuhan Zhang, Yaxin Mi, Zhizhao Zhao, Yitong Li et al.

Chromonic liquid crystals exhibit rich twisted configurations under cylindrical confinement, a challenging scenario for the classical Oseen-Frank theory due to its inherent energy unboundedness paradox in high-curvature settings. To overcome this limitation, we incorporate the quartic twist theory (proposed by Paparini and Virga) into the modelling of a nematic system confined …

Li-Lan Tian, Yu-Meng Zeng, Yi Zheng, Fan Zou et al.

A broad-focal-range liquid crystal (LC) lens array enabled by partitioned electric field modulation is proposed, featuring a simple design and low operating voltage. By combining zonal electrodes and a central electrode, the structure improves electric-field regulation in both the edge and central regions, enabling a smooth refractive-index distribution, effective focusing, and…

Hussein J. Abboud, Souad J. Lafta, Mazin M. Al-Obaidi, Ivan Hameed R. Tomi

A new series of 1,3,4-oxadiazole derivatives featuring a hockey-stick-shaped molecular architecture, composed of five interconnected phenyl rings linked via imine and ester functionalities, was successfully synthesised. The target compounds, designated as 4-(((4-(5-(4-methoxyphenyl)-1,3,4-oxadiazol-2-yl)phenyl)imino)methyl)phenyl-4-((4-alkoxyben-zylidene)amino)benzoate [Dn], we…

Yuyang Li, Danyang Wan, Juanli Li, Cheng Yang et al.

A series of novel rod-like liquid crystals incorporating a 4,5,6,7-tetrahydrobenzo[b]thiophene core were designed, synthesised, and systematically evaluated. The target mesogens were prepared through a modular synthetic route consisting of a Wolff – Kishner reduction, bromination, and Pd-catalysed Suzuki coupling, in which PdCl2(AmPhos)2 enabled efficient cross-coupling of orth…

Wing-Kit Choi, Bo-Kai Tseng, Chia-Hsiang Tung, Zi-Yi Huang et al.

A three-electrode vertically aligned fringe-field switching (VA-FFS) liquid crystal structure is proposed to overcome the intrinsic transmittance limitation of conventional VA-FFS devices while preserving their fast response characteristics. In the proposed design, a modified common electrode with a central opening and an additional bottom pixel electrode with opposite polarity…

Irum Rafique, Zhiqiang Wang, Xiao Wu, Xiao Peng Sun et al.

Worldwide energy crises and environmental protection require scientists to emphasize on green chemistry. However, the effective dissipation of excessive heat in electronic devices during operation requires highly conductive polymers. Therefore, the liquid crystal polybenzoxazine thermoset (Poly(BZR)) with enhanced heat conductivity was synthesized using non-edible biomass as ra…

Manpreet Kaur, Praveen Malik

In this study, the effects of curing time, monomer concentration, and polymer structure on the morphology, electro-optic, and dielectric properties of polymer dispersed liquid crystals (PDLCs) were systematically investigated using thiol-ene (NOA65) and acrylate (PCDH) polymers. Curing time and polymer concentration significantly influenced droplet morphology and electro-optica…

Vincent Plée, Christy Kate Mbadinga, Issyan Tekaya, Marie Giacomini et al.

Although the nematic – smectic transition is now well understood, the precise transformation of an hedgehog defect upon entering the smectic A phase remains largely unexplored. Here, we investigate the evolution of a hedgehog defect core in a freely suspended liquid crystal film during nematic – to – smectic-A (N – SmA) phase transition. As the temperature decreased, we first o…