Bussiness ManagementMBAstrategyHuman ResourceMarketingHospitalityE-commerceInternational Tradingproject managementmedia managementLogisticsFinanceAccountingadvertisingLawBusiness LawEducationEconomicsBusiness Reportbusiness planresearch proposal
英语论文题目英语教学英语论文商务英语英语论文格式商务英语翻译广告英语商务英语商务英语教学英语翻译论文英美文学英语语言学文化交流中西方文化差异英语论文范文英语论文开题报告初中英语教学英语论文文献综述英语论文参考文献
ResumeRecommendation LetterMotivation LetterPSapplication letterMBA essayBusiness Letteradmission letter Offer letter
澳大利亚论文英国论文加拿大论文芬兰论文瑞典论文澳洲论文新西兰论文法国论文香港论文挪威论文美国论文泰国论文马来西亚论文台湾论文新加坡论文荷兰论文南非论文西班牙论文爱尔兰论文
小学英语教学初中英语教学英语语法高中英语教学大学英语教学听力口语英语阅读英语词汇学英语素质教育英语教育毕业英语教学法
英语论文开题报告英语毕业论文写作指导英语论文写作笔记handbook英语论文提纲英语论文参考文献英语论文文献综述Research Proposal代写留学论文代写留学作业代写Essay论文英语摘要英语论文任务书英语论文格式专业名词turnitin抄袭检查
temcet听力雅思考试托福考试GMATGRE职称英语理工卫生职称英语综合职称英语职称英语
经贸英语论文题目旅游英语论文题目大学英语论文题目中学英语论文题目小学英语论文题目英语文学论文题目英语教学论文题目英语语言学论文题目委婉语论文题目商务英语论文题目最新英语论文题目英语翻译论文题目英语跨文化论文题目
日本文学日本语言学商务日语日本历史日本经济怎样写日语论文日语论文写作格式日语教学日本社会文化日语开题报告日语论文选题
职称英语理工完形填空历年试题模拟试题补全短文概括大意词汇指导阅读理解例题习题卫生职称英语词汇指导完形填空概括大意历年试题阅读理解补全短文模拟试题例题习题综合职称英语完形填空历年试题模拟试题例题习题词汇指导阅读理解补全短文概括大意
论文作者:英语论文网论文属性:硕士毕业论文 thesis登出时间:2011-07-07编辑:zn1987点击率:1976
论文字数:2313论文编号:org201107071105043604语种:英语 English地区:美国价格:$ 66
关键词:美国肯特州立大学液晶研究论文Liquid crystalVertical AlignmentMedia
摘要:英语论文网专业提供美国肯特州立大学液晶研究论文定制,美国留学生电子科技论文定制等论文服务。一个大的负介电各向异性液晶大双折射是可取的垂直对齐应用。但他们很难氧化硅垂直对齐表面。已发现一个有趣的方法产生高质量兴奋剂主机液晶的垂直对齐有一个氰基组沿其长分子的材料轴。
Improved Vertical Alignment of Liquid Crystals with a Large Negative Dielectric Anisotropy
Abstract
Liquid 美国肯特州立大学液晶研究论文 crystals with a large negative dielectric anisotropy and large birefringence are desirable for vertical alignment applications. But they are difficult to align vertically on SiOxsurfaces. An interesting method has been found to generate high quality vertical alignment by doping the host liquid crystal with materials that have a cyan group along their long molecular axis. Using this method we propose a way to design new liquid crystal mixtures with large dielectric anisotropy and birefringence that have improved aligning ability for applications requiring vertical alignment.
1.Introduction
Vertically aligned nomadic liquid crystals with a negative dielectric anisotropy (Δε) have been widely used in many display applications mainly because of the high contrast ratio. The vertical alignment can be obtained on polyimide thin films. But in many applications like micro-displays and telecommunication devices, inorganic alignment materials such as six are preferred forgetter UV stability and less cosmetic defects due to rubbings. On another hand, liquid crystals with a large negative Δε are preferred because they require lower driving voltage and give faster response. Unfortunately, liquid crystals with a large negative Δεare very difficult to align vertically on six, sometimes even onpolyimides. In a previous letter we reported that if an appropriate amount of a positive dielectric material, such as 5CB is added tithe host material that has a large negative Δε, uniform vertical alignment can be easily achieved on both Six and polyimide (PI) surfaces. [1] Similar results have been reported by Went et al. [2]Based on this effect we suggest a means to design new liquid crystal mixtures with a large negative Δε but also the ability to form high quality vertical alignment. We also propose an explanation for this effect and provide experimental evidence to support this explanation.
2.Experimental Results
In our experiments we used two liquid crystal mixtures, LC#1and LC#2; and two do pants: 5CB, and 1-ethoxy-4-(4’-transpropylcyclohexylcarboxy)-2,3-dicyanobenzene (hereafter calledC3 whose chemical structure is shown in fig. 1 ). LC#1 has moderate negative Δε and forms vertical alignment on SiOx.LC#2, which has a large negative Δε forms non-uniform planar alignment instead
6. References
[1] Cheng Chen, James E. Anderson, and Philip J. Boss, Jon. J. pal. Phys., Vol. 44, No. 35, pp. 1126, 2005.
[2] Chien-Hui Went, Sebastian Gauze, Jun Li, Haying Wang, and hin-Tson Wu, Liq. Cyst., www.51lunwen.org/usa/ Vol. 32, No. 5, pp. 643, 2005.
[3] Xinhua Lu, K. H. Yang, T. Nakasogi, and S. J. Chewy, SID nil. Sump. Dig., Vol. 29, No. 4, pp. 446, 2000.