NANOTECHNOLOGY
·
2023
·Vol. 34
·期 45
·45LT01
·
IF 3.5
Ying Chen,Huaruo Cui,Ran Duan,Ruiqi Tang,Yingping Tong,Dongyu Zhao,Wanli He
Blue phase liquid crystals (BPLCs) have significant potential in the field of liquid crystal displays (LCDs) and are proposed as potential next-generation of LCDs candidates. However, BPLCs do not emit light directly and need an extra backlight device. As a result, the blue phase liquid crystal display retains the disadvantages of low brightness and low energy efficiency, which remarkably limit its application. Recently, as a kind of novel fluorescent carbon nanomaterials, carbon dots (CDs) have captured considerable attention because of their excellent optical properties. Here, CDs were directly synthesized by a simple solvothermal method and introduced into BPLCs. By combining the excellent optical properties of CDs with the blue phase liquid crystal system, the photoluminescent blue phase liquid crystals (CDs-BPLCs) with self-photoluminescence are prepared. Meanwhile, the stability of BPLCs can be improved by CDs. Such CDs-BPLCs have enormous potential in the development of novel energy-saving display devices.
研究领域:
材料科学
·
光学
·
显示技术
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DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2019
·
IF 0.559
Yuzhen Zhao,Yang Zhao,Zhun Guo,Zongcheng Miao
For wider temperature blue-phase liquid crystal (BPLC), the optimized structures of blue-phase liquid crystal with 4′-(6-amino-hexyloxy)-biphenyl carbonitrile modified graphene oxide (GOre-LC) platelets were discussed in this article. It was shown experimentally that the blue-phase stability was enlarged based on the doping GOre-LC, a stable blue-phase with a wide temperature range (4.9 °C) was obtained, and a peculiar optical texture of the BP I phase was observed.
研究领域:
材料科学
·
液晶物理
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2016
·
IF 2.244
Weikai Zhang,WanLi He,Chenchen Di,Xin Wang,Zhou Yang,Dong Wang,Hui Cao,Dengke Yang,Huai Yang
A series of symmetrically thiophene-based bent-shaped molecules with branched terminal was synthesised and characterised. Then, their effects as dopants on the blue phase (BP) range of the chiral nematic liquid crystal (N*LC) host were investigated. It was found that the bent-shaped dopants with branched terminal had better miscibility in LC host than the bent-shaped dopants with straight terminal, and contributed to induce BP and enhance the BP temperature range, with the maximum BP temperature range about 20.4°C. Besides, the electro-optical (E-O) performances of the blue phase liquid crystal doped with Th-BC6 (a bent-shaped dopant with the widest induced BP range in N*LC) were also explored. It was found that the drive voltage reduced first and then increased with the doping amount of Th-BC6 increasing. When the doping amount of Th-BC6 was about 15 wt%, the hysteresis could be strikingly reduced.
研究领域:
材料科学
·
液晶物理
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Wenjie Yang,Chenglin Zheng,Li Sun,Zhiying Bie,Yuchen Yue,Xiuhong Li,Wentao Sun,Tomiki Ikeda,Jingxia Wang,Lei Jiang
Blue phase liquid crystals (BPLCs) have exhibited promising applications in 3D flexible displays due to their molecular-level self-assembled chiral structures, fast response, and tunable polarized colors. However, there remain challenges for spatiotemporal programming of 3D chiral color units for BPLC dynamic patterning. Herein, the programmable temporal evolution of micrometer-scale color units and spatial configuration switch of chiral modes are achieved by spontaneous ink diffusion-driven asymmetric lattice deformation in dual-chiral polymer-templated blue phases. Custom-printed colorful patterns are designed by machine learning-assisted parameter optimization, which displays programmable multidimensional encrypted information that incorporates temporal evolving colors (wavelength), spatial distribution (depth), chiral modes (L/R). The quantitative relationship between ink diffusion kinetics and blue-phase dynamic 3D structural optics is established by in situ characterization, finite element analysis, and mathematical geometry modeling. This work provides insights into the microgeometric manipulation of 3D chiral color of BPLCs in the application of information security and self-adaptive indicators.
研究领域:
材料科学
·
光学
·
信息加密
·
自适应显示
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Wenjie Yang,Chenglin Zheng,Jinghui Li,Yuchen Yue,Xiuhong Li,Lei Shi,Jingxia Wang,Lei Jiang
Blue-phase liquid crystals (BPLCs) possess unique 3D periodic chiral structures and extraordinary optical manipulation capabilities, demonstrating considerable potential in flexible displays, high-security encryption, and intelligent sensors. Despite lattice deformations of BPLCs widely exist in various applications, there remains a challenge to understanding the quantitative relationship between different deformation modes and resulting 3D diffractive optics. Herein, a universal simulation strategy is proposed based on spatial geometry modeling to enable real-time computation of dynamic optical responses in BPLCs. This framework systematically interprets and predicts the optical characteristics under both symmetric lattice deformations (governed by chiral dopant concentration) and asymmetric lattice deformations (induced by phase separation or component dispersion). Differentiated nonlinear optical effects are revealed for these deformations in Kossel diffraction analysis. Furthermore, anisotropic modulation of surface/sectional structural colors (photonic bandgaps) and angle-dependent control over the full spatial light field is demonstrated by tailoring interplanar spacing and facet orientation within the lattice symmetry constraints. This study establishes a theoretical foundation for designing next-generation BPLC-based photonic devices, including holographic displays, all-optical switches, integrated waveguides, and 3D lasing systems.
研究领域:
材料科学
·
光学工程
·
物理学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 19
·9024-9035
·
IF 3.925
Jun Li,Yuehua Cong,Haozhou Huang,Qiankun Shi,Yinggang Jia,Baoyan Zhang
Multiple mesophases, including the smectic A phase (Sm A), chiral nematic phase (N*), and blue phase (BP I), were seen in a series of non-symmetric bent mesogenic dimers containing a cholesteryl benzoate group. FTIR, 1H-NMR, DSC, POM, UV, and XRD were used to analyze the chemical structure and liquid crystal characteristics of the dimers. The phase transition occurred when the azobenzene structure was treated with UV light, changing the structure of the molecules. There is evidence that when the length of the terminal alkoxy chain is longer than the flexible spacer, it exhibits a smectic A phase as well as a chiral nematic phase; however, when the length of the flexible spacer is shorter than the length of the terminal alkoxy chain, it only exhibits a chiral nematic phase.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2016
·
IF 2.244
Weikai Zhang,Xiaomei Wang,Dong Wang,Zhou Yang,Hong Gao,Yan Xing,Wanli He,Hui Cao,Huai Yang
Liquid-crystalline blue phases (BPs) are stable only for very narrow temperature range between the isotropic and the chiral nematic phase that severely hinders their applicability. Herein, the aminoazobenzol group was chemically grafted onto epoxy group of graphene oxide (GO) via addition reaction. Successful grafting of aminoazobenzol group was confirmed using X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), UV–vis absorption spectra and thermogravimetric analysis (TGA). The resultant aminoazobenzol group–modified GO sheets, which is reduced (RGO-Az), were easily redispersable in common organic solvents or liquid crystals (LCs). By doping different contents of RGO-Az, nanosheets could stabilise BP and increase the BP range. When doped with 0.5 wt% RGO-Az, the mixtures show the wider range with 5.9°C than the range with 3.6°C of BPLCs without RGO-Az. Meanwhile, the phase sequence and the range of the aforementioned phases are reproducible upon heating and cooling, which shows that the BPs doped with RGO-Az nanosheets are thermodynamically stable.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2016
·
IF 0.532
Zongcheng Miao,Dong Wang,Hong Gao,Xiaomei Wang,Jianming Gu,Huiying Hu
Liquid-crystalline blue phases are stable only for very narrow temperature range between the isotropic and the chiral nematic phase that severely hinders their applicability. Herein, aminoazobenzol group was chemically grafted onto graphene oxide (GO) via amidization reaction. Successful grafting of aminoazobenzol group was confirmed using X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), UV-vis absorption spectra and Thermogravimetric analysis (TGA). The resultant aminoazobenzol group modified GO sheets which is reduced (GO-Az) were easily redispersed in common organic solvents. By doping different contents of GO-Az nanosheets could stabilize blue phase and increase the blue phase range. When doped with 0.5 wt% GO-Az, the mixtures show the wider range with 5.4°C than the range with 3.6°C of blue phase liquid crystals without GO-Az. Meanwhile, the phase sequence and the range of the aforementioned phases are reproducible upon heating and cooling, which shows that the blue phases doped with GO-Az nanosheets are thermodynamically stable.
研究领域:
材料科学
·
液晶技术
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yanqing Chen,Chenglin Zheng,Wenjie Yang,Jing Li,Feng Jin,Wei Zhang,Wentao Sun,Pingli Wang,Laifeng Li,Jingxia Wang,Lei Jiang
Blue phase liquid crystal (BPLC) lasers exhibit exceptional optical quality and tunability to external stimuli, holding significant promise for innovative developments in the field of flexible optoelectronics. However, there remain challenges for BPLC elastomer (BPLCE) lasers in maintaining good optical stability during stretching and varying temperature conditions. In this work, a stretchable laser is developed based on a well-designed BPLCE with a combination of partially and fully crosslinked networks, which can output a single-peak laser under small deformation (44.429 nm lasing shift at 32% strain) and a broad-temperature range (from −20 to 100 °C). The superior performance can be attributed to the nonlinear 3D asymmetric deformation exhibited by the BPI lattice during stretching, particularly at low deformation rates below 40% strain, which effectively maintains the stability of the body-centered cubic structure (with the maximum strain of this BPLCE up to 220%). Moreover, the BPLCE exhibits excellent thermal stability over a temperature range from −180 to 70 °C with a stopband shift of less than ±10 nm. As a proof-of-concept, the application of BPLCE laser for morphology sensing and 3D mechanical perception is demonstrated, which paves the way for potential applications of flexible optoelectronics.
研究领域:
材料科学
·
光电子学
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2018
·Vol. 9
·期 16
·2101-2108
·
IF 4.927
Jianqiu Jin,Mingjie Tang,Zhenghe Zhang,Kang Zhou,Yun Gao,Zhi-Gang Zheng,Weian Zhang
A series of POSS-functionalized liquid crystalline block copolymers (LC BCPs), PHEMAPOSS-b-P6CBMA, containing a crystalline polyhedral oligomeric silsesquioxane (POSS) block and a mesogenic cyanobiphenyl block, were prepared via reversible addition–fragmentation transfer (RAFT) polymerization for the first time and utilized to stabilize blue phase (BP) liquid crystals through facile doping. Using the advantages of both the POSS and polymer, a new strategy, which is distinct from the commonly adopted strategy for polymer stabilization of the BP, has been established. This new BP system with a wide BP range covering the typical room temperature range (i.e. 25–30 °C) leaps over intricate processing barriers, which are inevitable in conventional photo-induced polymer stabilization. In particular, improved electro-optical (E-O) properties of the BP, including lower driving voltage, lower hysteresis and a higher Kerr constant (K) compared with the common BP stabilized via photopolymerization, were obtained by optimizing the concentration of the doped LC BCP. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were employed to evaluate the thermal properties of the LC BCPs, and the results indicated that the introduction of POSS enhanced the thermostabilities of the copolymers effectively. Such an ingenious strategy provides a brilliant and easy way to form large size BP displays and other devices that are incompatible with UV light exposure during the working process.
研究领域:
高分子化学
·
材料科学
·
软凝聚态物理
·
功能材料
·
显示技术
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Meng Wang,Xiaosong Li,Yijie Gai,Yuxia Luo,Huai Yang
Blue phase liquid crystal elastomers (BPLCEs) hold significant promise for flexible photonic devices due to their 3D periodic photonic lattices and intrinsic soft-matter characteristics. However, achieving an optimal balance between mechanical resilience and dynamic responsiveness remains a critical challenge. This study introduces a dynamic hydrogen-bonding network design strategy, wherein N,N'-bisacryloylcystamine monomers are incorporated to construct a hierarchical energy dissipation system, yielding BPLCEs with remarkable toughness (1.72 MJ m − 3 ) and ultralow hysteresis (4.8%). By integrating thermally induced topological bond rearrangement, programmable mechanical gradient films are developed to enable high-precision strain-induced patterning and an adaptive encryption mechanism governed by a “relaxation-concealment/stretching-development” paradigm. Furthermore, leveraging the spatiotemporal gating properties of embedded phosphorescent materials, a dual-mode dynamic verification system is established, facilitating multidimensional information decryption via ultraviolet-triggered rapid visualization and controlled afterglow decay lasting up to 5 s. This study not only mitigates the inherent trade-off between mechanical durability and stimulus responsiveness in soft photonic crystals but also establishes a novel framework for multidimensional synergistic regulation across mechanical, optical, and temporal domains. These findings provide a transformative strategy for advancing next-generation dynamic encryption systems, intelligent sensing technologies, and adaptive photonic displays, paving the way for innovative applications in flexible photonic devices.
研究领域:
材料科学
·
软物质物理
·
光子学
·
高分子化学
·
机械化学
·
信息加密技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）