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Fabrication of liquid-crystalline polymer films with cycloidal molecular alignment patterns by scanning wave photopolymerization 扫描波光聚合制备具有摆线分子排列模式的液晶聚合物薄膜
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2596298
Hiro Nakamura, Y. Kobayashi, Me Ota, M. Aizawa, S. Kubo, A. Shishido
{"title":"Fabrication of liquid-crystalline polymer films with cycloidal molecular alignment patterns by scanning wave photopolymerization","authors":"Hiro Nakamura, Y. Kobayashi, Me Ota, M. Aizawa, S. Kubo, A. Shishido","doi":"10.1117/12.2596298","DOIUrl":"https://doi.org/10.1117/12.2596298","url":null,"abstract":"The control of molecular alignment patterns in liquid crystals is key to developing high-performance optical devices. In particular, two-dimensionally designed patterns have attracted much attention due to their potential application to novel optical devices such as a high efficiency polarization grating and a vortex converter. However, there remain challenges in obtaining molecular alignment patterns by a simple method. We have recently proposed a novel method for controlling the alignment of liquid crystals termed scanning wave photopolymerization (SWaP). In this method, a mass flow triggered by spatiotemporal photopolymerization causes shear stresses to anisotropic molecules, resulting in the generation of alignment patterns finely guided by the scanned light. In this study, we present the direct fabrication of polymer films with cycloidal molecular alignment patterns by SWaP.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"734 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116108600","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
Formation of cholesteric labyrinths: theory and experiments 胆汁迷路的形成:理论与实验
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594678
S. Echeverría-Alar, M. Clerc, G. González-Cortés
{"title":"Formation of cholesteric labyrinths: theory and experiments","authors":"S. Echeverría-Alar, M. Clerc, G. González-Cortés","doi":"10.1117/12.2594678","DOIUrl":"https://doi.org/10.1117/12.2594678","url":null,"abstract":"","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123881192","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
Control of bacteria movement by using photo responsive media 利用光反应介质控制细菌运动
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2595634
T. Galstian, I. Duchesne
{"title":"Control of bacteria movement by using photo responsive media","authors":"T. Galstian, I. Duchesne","doi":"10.1117/12.2595634","DOIUrl":"https://doi.org/10.1117/12.2595634","url":null,"abstract":"Liquid crystalline materials have been shown to be an excellent host matrix enabling the easy observation of bacteria movements. In some cases, even the high sensitivity of such matrix was used to control materials’ properties by bacteria. Motivated by the key role played by bacteria in the health and food industries, our group is working on the development of dynamic micro control techniques by using photosensitivity of azobenzene or DSCG molecules. We think that the capability to control their movement may be useful for many applications, and, in the present work, we explore the possibility of such active control of the movement of flagellated bacteria (a bacterium that can swim thanks to the rotation of its helix). We demonstrate that we can dynamically change the swimming direction of bacteria by incorporating them into a liquid crystal where the phase transition is locally controlled by UV illumination. We shall also mention briefly about other types of control (magnetic, isomeriz)","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122936095","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
Toward high-performance terahertz-region liquid crystals: Computational modeling of fused ring nematic and discotic mesogens 迈向高性能太赫兹区液晶:融合环向列和盘状介元的计算模型
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594958
K. Marshall, Baris E. Ugur, W. Scullin
{"title":"Toward high-performance terahertz-region liquid crystals: Computational modeling of fused ring nematic and discotic mesogens","authors":"K. Marshall, Baris E. Ugur, W. Scullin","doi":"10.1117/12.2594958","DOIUrl":"https://doi.org/10.1117/12.2594958","url":null,"abstract":"","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121584962","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
Orientational optical nonlinearity of nematic liquid crystals integrated with THz metamaterials 与太赫兹超材料集成的向列液晶的取向光学非线性
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594484
Eleni Perivolari, V. Fedotov, V. Apostolopoulos, M. Kaczmarek
{"title":"Orientational optical nonlinearity of nematic liquid crystals integrated with THz metamaterials","authors":"Eleni Perivolari, V. Fedotov, V. Apostolopoulos, M. Kaczmarek","doi":"10.1117/12.2594484","DOIUrl":"https://doi.org/10.1117/12.2594484","url":null,"abstract":"","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116888642","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
Photonic liquid crystals on a single substrate for label-free protein assays 用于无标记蛋白分析的单底物光子液晶
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2593821
Mon-Juan Lee, Chao-Ping Pai, Po-Chang Wu, Wei Lee
{"title":"Photonic liquid crystals on a single substrate for label-free protein assays","authors":"Mon-Juan Lee, Chao-Ping Pai, Po-Chang Wu, Wei Lee","doi":"10.1117/12.2593821","DOIUrl":"https://doi.org/10.1117/12.2593821","url":null,"abstract":"Label-free qualitative and quantitative protein assays were established with a single-substrate biosensing platform based on cholesteric liquid crystal (CLC) films with different ratios of the thickness d to the helical pitch P. By adjusting the amount of chiral dopant incorporated in CLC, the d/P ratio or the center wavelength of Bragg’s reflection band can be fine-tuned to achieve signal amplification or to improve detection sensitivity. The single-substrate platform eliminates the need for LC cell assembly, which requires a pair of glass substrates, and can be conveniently integrated with the format of most clinical assays performed on a single solid surface.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114924682","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
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