发布求助
文献互助 智能选刊 最新文献

Liquid crystals (Print)最新文献

筛选
英文 中文
Effective materials for display applications: fullerene-doped PDLC 显示应用的有效材料:富勒烯掺杂PDLC
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581219
N. Kamanina, I. Denisyuk
{"title":"Effective materials for display applications: fullerene-doped PDLC","authors":"N. Kamanina, I. Denisyuk","doi":"10.1117/12.581219","DOIUrl":"https://doi.org/10.1117/12.581219","url":null,"abstract":"New fullerene-doped nematic liquid crystal spatial light modulator with Mg-phthalocyanine nanocrystals has been investigated. Temporal characteristics of this device have been studied. Based on complex formation between fullerene and phthalocyanine, it has been shown that new structure exhibits high speed and operates at supply voltage pulse frequency of more than 100 Hz. A mechanism of a liquid crystal mesophase orientation has been discussed. Potentials of the system for display application have been examined.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115888348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
External control of a stop band position in a visible spectra of photonic crystal opal infiltrated with nematic LC 向列LC渗透光子晶体蛋白石可见光谱中停止带位置的外部控制
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581096
L. Rastenienė, S. Pajeda, Antanas Kudarauskas, V. Bastys, A. Kulbickas, Mantas Miksys, R. Vaišnoras
{"title":"External control of a stop band position in a visible spectra of photonic crystal opal infiltrated with nematic LC","authors":"L. Rastenienė, S. Pajeda, Antanas Kudarauskas, V. Bastys, A. Kulbickas, Mantas Miksys, R. Vaišnoras","doi":"10.1117/12.581096","DOIUrl":"https://doi.org/10.1117/12.581096","url":null,"abstract":"Recently photonic crystals with a three-dimensional ordered structure with periodicity of the optical wavelength have attracted attention from both fundamental and practical points of view. The physics and applications of photonic crystals have been active topic of research now. The application of photonic crystals is to create tunable band gap materials especially in visible spectra region, where the gap could be controlled by an external parameter. We have studied transmission and linear dichroism spectra of synthetic opal, refractive index n = 1,342, infiltrated with nematic liquid crystal with averaged refractive index n = 1,596 or with water n = 1,30 and alcohol n = 1,28. We demonstrating that the position of the stop band in the visible spectra is shifted by changing of refractive index of the infiltrated material or by changing the filling factor or by variation of an incidence angle of light.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121902677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of polarisability tensor for p-(p-ethoxyphenylazo)phenyl heptanoate LC molecule for different wavelengths of the light 对(对乙氧基苯基偶氮)苯基庚酸LC分子在不同波长光下的极化张量研究
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581137
P. Adamski, A. Bubnov
{"title":"Study of polarisability tensor for p-(p-ethoxyphenylazo)phenyl heptanoate LC molecule for different wavelengths of the light","authors":"P. Adamski, A. Bubnov","doi":"10.1117/12.581137","DOIUrl":"https://doi.org/10.1117/12.581137","url":null,"abstract":"The influence of the wavelength of light on values of polarisability tensor components αparallel, αperpendicular, polarisability anisotropy (αparallel - αperpendicular) and the order parameter S of liquid crystal molecules was verified. The refractive indices are functions of temperature and light wavelength. The values αparallel and αperpendicular of a liquid crystal molecule can be calculated from refractive indices, density, and coefficient in the Valentova equation. Here, it was found that there is a relation between the wavelengths of the light and values of (αparallel - αperpendicular) and αparallel, αperpendicular of p-(p-ethoxyphenylazo)phenyl heptanoate molecule. The values of the order parameter S obtained for the studied material are identical for all wavlengths of light.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125951199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of nematic liquid crystal material parameters by use of wedge cells 用楔形槽测定向列液晶材料参数
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581140
J. Kędzierski, M. Kojdecki, Z. Raszewski, L. Lipińska, J. Rutkowska, E. Miszczyk, Jerzy Borycki
{"title":"Determination of nematic liquid crystal material parameters by use of wedge cells","authors":"J. Kędzierski, M. Kojdecki, Z. Raszewski, L. Lipińska, J. Rutkowska, E. Miszczyk, Jerzy Borycki","doi":"10.1117/12.581140","DOIUrl":"https://doi.org/10.1117/12.581140","url":null,"abstract":"Three wedge cells of the wedge angle of order of few milliradians were used to measure the phase shift between ordinary and extraordinary ray of transmitted light, for the stationary states, induced by magnetic or electric field. A nematic liquid crystal PCB, filling the cell, was of the planar alignment enforced by the previous treatment of the flat boundary plates. Two polyimides, MP9 and PM2, and clean glass were used as aligning substances. A system of interference fringes appeared in each cell placed in normally incident light between analyzer and polarizer crossed. In the neighborhood of each fringe a cell was considered as a flat-parallel one and hence it was equivalent to a system of flat cells of different precisely determined thickness. The dependence of the phase shift on applied external fields was measured for twenty-six interference fringes. The nematic liquid crystal material parameters (the splay and bend elastic constants, the anisotropy of diamagnetic susceptibility and the boundary tilt angle as a function of torque) were determined by comparing the calculated characteristics to the measured ones i.e. by solving the inverse problem simultaneously for all measured characteristics as input data. Each of studied cells represented distinct case of anchoring: strong, medium or weak.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128510724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Nematic point defect annihilation in a cylindrical capillary 圆柱形毛细管中的向列点缺陷湮没
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581103
M. Svetec, Z. Bradac, S. Kralj
{"title":"Nematic point defect annihilation in a cylindrical capillary","authors":"M. Svetec, Z. Bradac, S. Kralj","doi":"10.1117/12.581103","DOIUrl":"https://doi.org/10.1117/12.581103","url":null,"abstract":"We perform a numerical study of the annihilation of nematic radial and hyperbolic point defect. Both the pre-collision and post-collision stages are taken into account. Initially a pair of defects is induced at the axis of the cylindrical capillary. A semi-microscopic interaction potential and the Brownian molecular dynamics are used. In the early stage the cores of defects are negligibly mutually influenced. Their relative velocity is inversely proportional to the separation d between defects. As d becomes comparable to the nematic correlation length, the cores significantly deform. During the collision the defects merge and become indistinguishable. In the post-collision regime the order parameter at the collision site gradually recovers the equilibrium configuration.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128959085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The structural transitions in the thermotropic ferronematics 热致铁学中的结构转变
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581104
P. Kopčanský, I. Potočová, M. Koneracká, M. Timko, J. Jadżyn, G. Czechowski, A. M. Jansen
{"title":"The structural transitions in the thermotropic ferronematics","authors":"P. Kopčanský, I. Potočová, M. Koneracká, M. Timko, J. Jadżyn, G. Czechowski, A. M. Jansen","doi":"10.1117/12.581104","DOIUrl":"https://doi.org/10.1117/12.581104","url":null,"abstract":"The structural transitions in thermotropic ferronematic, i.e. nematic liquid crystal (8CB) doped with fine magnetic particles (d~10 nm), exposed to combined electric and magnetic fields, were studied within the Burylov and Raikher's theory. Using the found formulas for the threshold fields of studied transitions and their values obtained by the capacitance measurements, the anchoring energy W of liquid crystal molecules on the magnetic particles surfaces, as well as parameter ω, determining the type of anchoring, were calculated. The calculated values indicated the presence of soft, or some intermediate state between soft and rigid anchoring, in studied ferronematic. These results are in agreement with the Burylov and Raikher's theory of thermotropic ferronematics.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"474 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120931191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of same changes in rotational potentials between ferro-and antiferroelectric phases 铁电相和反铁电相之间旋转电位相同变化的测定
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581077
P. Perkowski, Z. Raszewski, J. Kędzierski, W. Piecek, J. Rutkowska, J. Zieliński, R. Dabrowski, W. J. Drzewinski
{"title":"Determination of same changes in rotational potentials between ferro-and antiferroelectric phases","authors":"P. Perkowski, Z. Raszewski, J. Kędzierski, W. Piecek, J. Rutkowska, J. Zieliński, R. Dabrowski, W. J. Drzewinski","doi":"10.1117/12.581077","DOIUrl":"https://doi.org/10.1117/12.581077","url":null,"abstract":"Rotational potential of molecule in smectic phases, introduced by Zeks, includes two important parts: dipolar as well as quadrupolar ones. The first part is valid for chiral molecules only, whereas the second one is important for chiral and achiral molecules. The question arises: \"Whether shape of rotational potential changes when the phase transition between SmC* and SmCA* appears?\" In our opinion, close to the temperature of phase transition (FLC-AFLC) magnitudes of both, dipolar and quadrupolar parts change. Quadrupolar coupling is more important for antiferroelectric phase, while dipolar factor overwhelms quadrupolar one, for ferroelectric phase.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"44 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116540505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Broad temperature range antiferroelectric regular mixtures 宽温度范围反铁电规则混合物
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581061
R. Dabrowski, K. Czupryński, J. Gąsowska, J. Otón, X. Quintana, P. Castillo, N. Bennis
{"title":"Broad temperature range antiferroelectric regular mixtures","authors":"R. Dabrowski, K. Czupryński, J. Gąsowska, J. Otón, X. Quintana, P. Castillo, N. Bennis","doi":"10.1117/12.581061","DOIUrl":"https://doi.org/10.1117/12.581061","url":null,"abstract":"Tristate regular mixtures with different electro-optical properties such as threshold voltage, saturation voltage, holding ratio and response time are presented. The relation of properties with the structure of compounds is discussed. All of mixtures show only moderate dynamic and static contrast but big gray level scale without hysteresis for positive and negative field driving.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132189263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Determination of nematics material parameters by measurements of Fredericksz transitions in crossed electric and magnetic fields in wedge cell 用测量楔槽中交叉电场和磁场中的Fredericksz跃迁来测定向列材料参数
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581095
J. Kędzierski, Z. Raszewski, M. Kojdecki, E. Miszczyk, P. Perkowski, W. Piecek, L. Lipińska
{"title":"Determination of nematics material parameters by measurements of Fredericksz transitions in crossed electric and magnetic fields in wedge cell","authors":"J. Kędzierski, Z. Raszewski, M. Kojdecki, E. Miszczyk, P. Perkowski, W. Piecek, L. Lipińska","doi":"10.1117/12.581095","DOIUrl":"https://doi.org/10.1117/12.581095","url":null,"abstract":"Wedge cells of the wedge angle of order of few milliradians were used to measure the threshold voltages for the Freedericksz transition in electric and magnetic fields crossed. A nematic liquid crystal, PCB, filling cells was of planar orientation enforced by the treatment of the flat boundary plates, covered with poly(amic acid) PM9. A system of interference fringes appeared in each cell placed in normally incident light between analyzer and polarizer crossed. In the vicinity of each fringe a cell could be considered as a flat-parallel one and hence it was equivalent to the system of flat cells of different precisely determined thickness. Threshold voltages, parameterized by magnetic field magnitudes were interpreted as the eigenvalues of the boundary eigenvalue problem for the operator of the second derivative; the interaction between the nematics and the substrates was assumed very strong with the anchoring direction parallel to the cell boundaries. The resulting formulae were used to determine the anisotropy of diamagnetic susceptibility and the splay elastic constant of PCB after the threshold magnitudes measured. The estimates of material parameters agreed well with those determined by the composite method.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115195939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
High-precision low-cost colorimeters and spectrophotometers based on liquid crystalline optics 基于液晶光学的高精度低成本色度计和分光光度计
Liquid crystals (Print) Pub Date : 2004-09-01 DOI: 10.1117/12.581205
P. Kohns, A. Muravski, Y. Machekhin, R. Kankia, V. Svirid, P. Rudquist, G. Lester
{"title":"High-precision low-cost colorimeters and spectrophotometers based on liquid crystalline optics","authors":"P. Kohns, A. Muravski, Y. Machekhin, R. Kankia, V. Svirid, P. Rudquist, G. Lester","doi":"10.1117/12.581205","DOIUrl":"https://doi.org/10.1117/12.581205","url":null,"abstract":"As the phenomenon \"color\" is involved in almost each production where is a great demand for inexpensive and precise colorimeters. Today there are in principle two kinds of colorimeters: three-channel colorimeters (which are cheap but not accurate) and array spectrometers (which offer a high accuracy at a high price). Liquid crystals have the potential to allow accurate color measurements at a low price. We show three different schemes of colorimeters and actual measurements. The accuracy of our colorimeters is better than 0.005 for each color coordinate.","PeriodicalId":132866,"journal":{"name":"Liquid crystals (Print)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115806276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信