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Effect of molecular diffusion on polymerization behavior induced by scanning wave photopolymerization 分子扩散对扫描波光聚合行为的影响
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2596416
Takuto Ishiyama, Y. Kobayashi, S. Kubo, A. Shishido
{"title":"Effect of molecular diffusion on polymerization behavior induced by scanning wave photopolymerization","authors":"Takuto Ishiyama, Y. Kobayashi, S. Kubo, A. Shishido","doi":"10.1117/12.2596416","DOIUrl":"https://doi.org/10.1117/12.2596416","url":null,"abstract":"Molecular alignment control in polymer films is key to the development of high-performance materials with optical, electronic and thermal functions. Among molecular alignment techniques, a photoalignment method offers the fine and remote control of two-dimensional molecular alignment by the irradiation with linearly polarized light. We have recently proposed a novel photoalignment method based on the molecular diffusion caused by the polymer concentration gradient, termed scanning wave photopolymerization. In this study, we report specific polymerization behavior occurring during the process of the scanning wave photopolymerization. We investigate the effect of molecular diffusion on the photopolymerization behavior by measuring molecular weight of the polymers obtained under various photopolymerization conditions.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"1 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":"131295437","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
Tunable structural color with thermal actuation of liquid crystal polymer 液晶聚合物的热致动可调结构颜色
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594400
Yun‐Seok Choi, M. Shin, Geonhyeong Park, D. Yoon
{"title":"Tunable structural color with thermal actuation of liquid crystal polymer","authors":"Yun‐Seok Choi, M. Shin, Geonhyeong Park, D. Yoon","doi":"10.1117/12.2594400","DOIUrl":"https://doi.org/10.1117/12.2594400","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":"131755775","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
Analysis of surface relief structures formed by patterned-photopolymerization induced molecular diffusion 图案光聚合诱导分子扩散形成的表面起伏结构分析
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2596361
Sayuri Hashimoto, N. Akamatsu, S. Kubo, A. Shishido
{"title":"Analysis of surface relief structures formed by patterned-photopolymerization induced molecular diffusion","authors":"Sayuri Hashimoto, N. Akamatsu, S. Kubo, A. Shishido","doi":"10.1117/12.2596361","DOIUrl":"https://doi.org/10.1117/12.2596361","url":null,"abstract":"The control of the surface topology is important to utilize their high functionality for a wide variety of applications such as optics and mechanics. Several methods of controlling the surface topology have been proposed; in particular, the light irradiation can precisely control the surface topology in a non-contacting manner. However, conventional methods using the light irradiation need complicated processes with specific photoresponsive molecules. Recently, we revealed that patterned photopolymerization, based on a novel method of molecular alignment, induced surface relief structures on a film; yet, the relationship between the surface structures and molecular alignment has not been clarified. In this study, we made the detailed investigation of surface structures and molecular alignment of the film induced by patterned photopolymerization.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"6 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":"124198269","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
Achromatic polarization rotator based on splay-twist liquid crystal 基于斜扭液晶的消色差偏振旋转器
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2596414
Tsung-Hsien Lin, Chun-Wei Chen, Duan-Yi Guo, Li-Min Chang
{"title":"Achromatic polarization rotator based on splay-twist liquid crystal","authors":"Tsung-Hsien Lin, Chun-Wei Chen, Duan-Yi Guo, Li-Min Chang","doi":"10.1117/12.2596414","DOIUrl":"https://doi.org/10.1117/12.2596414","url":null,"abstract":"An electrically tunable achromatic polarization rotator has been developed based on the hybrid splay-twist (HST) liquid crystal. The proposed polarization rotator is advantageous over the conventional ones owing to the thin thickness (sub-100μm), continuous angular rotation, and achromatic operation across the entire visible spectrum. The tuning range of the polarization rotator is up to 90° via a simple electric field application; meanwhile, the degree of linear polarization (DOLP) remains. The rotation angle can be expanded to 180° by a tandem-cell geometry. The work will offer possibilities in the design of various optical systems and spatially polarization multiplexing elements.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"145 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":"123495811","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
Self-powered photovoltaic liquid crystal light modulators (SP-PSLM) 自供电光伏液晶光调制器(SP-PSLM)
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594240
S. Fall, Nicolas Brouckaert, Yao-Xin Lin, N. Podoliak, M. Kaczmarek, G. D’Alessandro, Mohammed Ibn Elhaj, L. Komitov, T. Heiser
{"title":"Self-powered photovoltaic liquid crystal light modulators (SP-PSLM)","authors":"S. Fall, Nicolas Brouckaert, Yao-Xin Lin, N. Podoliak, M. Kaczmarek, G. D’Alessandro, Mohammed Ibn Elhaj, L. Komitov, T. Heiser","doi":"10.1117/12.2594240","DOIUrl":"https://doi.org/10.1117/12.2594240","url":null,"abstract":"Photo-voltaic light modulators consist of a liquid crystal layer integrated with an organic photovoltaic structure. Addressing them with light produces an internal voltage that changes the liquid crystal orientation and the optical transmission properties of the device. They offer an exciting prospect for autonomous, light controlled smart displays and visors. \u0000Herein we report the development of self-activated light modulators, whose transmittance drops with increasing light intensity without applying an external power supply. This could be achieved by introducing a tandem photovoltaic structure that allows to produce larger voltages. Crossed polarized intensity measurements on devices based on different liquid crystals and photovoltaic layers are presented to clarify the physical mechanisms underlying self-activation.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"37 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":"113958804","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
Photoalignment controls of liquid crystals for photonic materials design 用于光子材料设计的液晶光对准控制
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594055
A. Shishido
{"title":"Photoalignment controls of liquid crystals for photonic materials design","authors":"A. Shishido","doi":"10.1117/12.2594055","DOIUrl":"https://doi.org/10.1117/12.2594055","url":null,"abstract":"We present a dye-free alignment patterning technique, based on a scanning wave photopolymerization (SWaP) concept, that achieves a spatial light–triggered mass flow to direct molecular order using scanning light to propagate the wavefront. This enables one to generate macroscopic, arbitrary 2D alignment patterns in a wide variety of optically transparent polymer films from various polymerizable mesogens with sufficiently high birefringence (>0.1) merely by single-step photopolymerization.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"23 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120818546","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
Nanotechnology inspired biosensor with photo-responsive liquid crystals 受纳米技术启发的光响应液晶生物传感器
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594628
L. Sio, K. Jeong, F. Petronella, M. D. Angelis, Federica Zaccagnini, V. Verrina, D. Biase, Seokju Lim, N. Godman, D. Evans, M. McConney
{"title":"Nanotechnology inspired biosensor with photo-responsive liquid crystals","authors":"L. Sio, K. Jeong, F. Petronella, M. D. Angelis, Federica Zaccagnini, V. Verrina, D. Biase, Seokju Lim, N. Godman, D. Evans, M. McConney","doi":"10.1117/12.2594628","DOIUrl":"https://doi.org/10.1117/12.2594628","url":null,"abstract":"We aim to realize a novel nanotechnology-based biosensor specifically utilized to detect harmful bacteria in potable water. The nano-inspired device makes use of a chemically functionalized gold nanorods array (for the selective selection of specific pathogens) layered with a photo-responsive nematic liquid crystal (NLC) film for real-time and high sensitivity detection. The first experimental results are presented and discussed.","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"25 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":"131434198","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
Dynamics of flow-induced birefringence in phantasmagoric liquid crystals 闪烁液晶中流动诱导双折射的动力学
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594463
J. Yamamoto, Nozomu Takahashi, G. Scalia
{"title":"Dynamics of flow-induced birefringence in phantasmagoric liquid crystals","authors":"J. Yamamoto, Nozomu Takahashi, G. Scalia","doi":"10.1117/12.2594463","DOIUrl":"https://doi.org/10.1117/12.2594463","url":null,"abstract":"","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"15 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":"114744886","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
Label-free bioassay based on lyotropic chromonic liquid crystal 基于溶致变色液晶的无标记生物测定
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2603126
Hassanein Shaban, Mon-Juan Lee, Wei Lee
{"title":"Label-free bioassay based on lyotropic chromonic liquid crystal","authors":"Hassanein Shaban, Mon-Juan Lee, Wei Lee","doi":"10.1117/12.2603126","DOIUrl":"https://doi.org/10.1117/12.2603126","url":null,"abstract":"","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"47 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":"134641710","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
Fabrication of liquid-crystalline polymer networks by scanning wave photopolymerization 扫描波光聚合法制备液晶聚合物网络
Liquid Crystals XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2596407
Y. Kobayashi, S. Kubo, A. Shishido
{"title":"Fabrication of liquid-crystalline polymer networks by scanning wave photopolymerization","authors":"Y. Kobayashi, S. Kubo, A. Shishido","doi":"10.1117/12.2596407","DOIUrl":"https://doi.org/10.1117/12.2596407","url":null,"abstract":"","PeriodicalId":145723,"journal":{"name":"Liquid Crystals XXV","volume":"38 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":"121884910","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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