共查询到19条相似文献,搜索用时 46 毫秒
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液晶垂直取向膜材料的研究 总被引:3,自引:0,他引:3
叙述了近几年来液晶垂直取向材料领域的发展。对目前常见的几种具有应用前景的垂直取向技术分别给予了关注,同时初步探讨了其各自的取向机理,并展望了该技术在未来几年可能获得的发展。 相似文献
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侧链型偶氮聚合物液晶的光致取向 总被引:2,自引:0,他引:2
侧链型偶氮聚合物液晶是一种新型光子材料,在光信息存储和光开关等领域有重要的应用前景,近几年来,这方面的研究工作发展迅速,已成为聚合物液晶领域中新的生长点,文中对偶氮聚合物液晶光致取向各方面的研究成果进行了概要分析,对其研究进展和发展趋向进行了综述。 相似文献
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浮雕型全息光栅诱导液晶分子取向排列的研究 总被引:1,自引:0,他引:1
在玻璃衬底上制备浮雕型全息光栅作为液晶显示器件取向层,分析了液晶层厚度对液晶分子在光栅取向层上排列的影响.发现液晶层厚度约为8μm时,液晶分子是沿光栅沟槽方向一致排列,其显微织构均匀,各点光强均匀一致,两个相同光强的状态周期为90°,周期性的微沟槽是促使液晶分子取向一致的主要原因. 相似文献
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模仿生物膜表面的液晶态结构,将有序的、流动的胆甾醇液晶与基质材料聚氯乙烯共混,通过在成膜过程中施加不同强度的电场,制成取向聚氯乙烯/液晶复合膜,作为抗凝血生物材料.通过各种测试手段,考察不同取向条件下复合膜表面液晶畴的取向性能、尺寸、表面形态及其与电场强度、液晶含量的相关关系.结果表明:取向聚氯乙烯/液晶复合膜表面呈现出的形态特征是液晶含量、电场强度和基质材料大分子链诱导作用等综合因素影响的结果;电场强度可以调控液晶畴的体积和取向性;通过适当调节电场强度和液晶含量可获得具有一定相分离程度和有序性的复合膜. 相似文献
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研究了超枝化偶氮液晶高分子在脉冲激光辐射下的各向异性取向特性.实验结果表明:在脉冲激光辐射下,偶氮基团沿着垂直于激光的偏振方向取向,并且由于纳秒激光辐射具有强烈的热效应,偶氮基团的取向程度对激光强度变化呈现出独特的抛物线行为.经过在一定温度条件下的加热处理,偶氮基团的取向程度大大增强. 相似文献
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Molecular Ordering: Selectivity of Threefold Symmetry in Epitaxial Alignment of Liquid Crystal Molecules on Macroscale Single‐Crystal Graphene (Adv. Mater. 40/2018)
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Tian‐Zi Shen Seung‐Ho Hong Jae‐Hyun Lee Seog‐Gyun Kang Bomi Lee Dongmok Whang Jang‐Kun Song 《Advanced materials (Deerfield Beach, Fla.)》2018,30(40)
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Peng Chen Ling‐Ling Ma Wei Duan Ji Chen Shi‐Jun Ge Zhi‐Han Zhu Ming‐Jie Tang Ran Xu Wei Gao Tao Li Wei Hu Yan‐Qing Lu 《Advanced materials (Deerfield Beach, Fla.)》2018,30(10)
Cholesteric liquid crystal (CLC) chiral superstructures exhibit unique features; that is, polychromatic and spin‐determined phase modulation. Here, a concept for digitalized chiral superstructures is proposed, which further enables the arbitrary manipulation of reflective geometric phase and may significantly upgrade existing optical apparatus. By encoding a specifically designed binary pattern, an innovative CLC optical vortex (OV) processor is demonstrated. Up to 25 different OVs are extracted with equal efficiency over a wavelength range of 116 nm. The multiplexed OVs can be detected simultaneously without mode crosstalk or distortion, permitting a polychromatic, large‐capacity, and in situ method for parallel OV processing. Such complex but easily fabricated self‐assembled chiral superstructures exhibit versatile functionalities, and provide a satisfactory platform for OV manipulation and other cutting‐edge territories. This work is a vital step towards extending the fundamental understanding and fantastic applications of ordered soft matter. 相似文献
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M. Marinelli F. Mercuri U. Zammit F. Scudieri 《International Journal of Thermophysics》1998,19(2):595-601
The photopyroelectric technique has been used to measure simultaneously the specific heat, the thermal conductivity, and the thermal diffusivity of 9CB liquid crystal in the temperature range 35 to 60°C, where the sample undergoes a weakly first-order phase transition and a second-order one. Measurements of the anisotropy of the thermal conductivity have also been performed, and the data have been used to establish the order of the above-mentioned phase transitions. Pretransitional effects in the isotropic phase in the thermal diffusivity have been found, and they have been associated with similar effects reported for the specific heat. 相似文献
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Peng Chen Bing-Yan Wei Wei Hu Yan-Qing Lu 《Advanced materials (Deerfield Beach, Fla.)》2020,32(27):1903665
Planar optical elements that can manipulate the multidimensional physical parameters of light efficiently and compactly are highly sought after in modern optics and nanophotonics. In recent years, the geometric phase, induced by the photonic spin–orbit interaction, has attracted extensive attention for planar optics due to its powerful beam shaping capability. The geometric phase can usually be generated via inhomogeneous anisotropic materials, among which liquid crystals (LCs) have been a focus. Their pronounced optical properties and controllable and stimuli-responsive self-assembly behavior introduce new possibilities for LCs beyond traditional panel displays. Recent advances in LC-mediated geometric phase planar optics are briefly reviewed. First, several recently developed photopatterning techniques are presented, enabling the accurate fabrication of complicated LC microstructures. Subsequently, nematic LC-based transmissive planar optical elements and chiral LC-based broadband reflective elements are reviewed systematically. Versatile functionalities are revealed, from conventional beam steering and focusing, to advanced structuring. Combining the geometric phase with structured LC materials offers a satisfactory platform for planar optics with desired functionalities and drastically extends exceptional applications of ordered soft matter. Some prospects on this rapidly advancing field are also provided. 相似文献