Fundamentals and applications of ferro- and antiferroelectric liquid crystals - the physics and chemistry of "de Vries"-type materials

铁电和反铁电液晶的基础和应用 - “de Vries”型材料的物理和化学

• 批准号: 173853318
• 负责人: Professor Dr. Frank Gießelmann
• 金额: --
• 依托单位: Institut für Physikalische Chemie (IPC)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/173853318?language=en
• 关键词: Fundamentals; applications; ferro; antiferroelectric; liquid

A joint program of research in chiral/polar liquid crystals showing fast analog electrooptics is proposed between investigators at the University of Colorado, Boulder, Chalmers University of Technology, Sweden, the University of Stuttgart, Germany, Queen’s University, Canada, and the University of Strathclyde, United Kingdom.The principal investigators at the University of Colorado have broad combined expertise in the synthesis, characterization and modeling of liquid crystal materials. They collaborate in several research projects, including the multidisciplinary Liquid Crystal Materials Research Center (LCMRC), an NSF MRSEC. The LCMRC is a unique venue worldwide for research on polarity and chirality and their interplay in condensed phases. The proposed Materials World Network partners maintain similar yet complementary programs of investigation of chiral liquid crystals, with support from their national funding agencies.This proposal requests support to broaden a program of intensive joint materials research with Chalmers and Stuttgart begun in 1999, and funded as a Materials World Network in 2006. With the addition of synthetic and theoretical thrusts, the requested funding will enable enhanced collaboration in an exciting area of forefront liquid crystal research, combining the complementary capabilities of the partner groups in projects that pursue the fundamental science and applications of analog polar/chiral smectic liquid crystals as the principal overall theme. While various combinations of the MWN partners have been collaborating separately over the past several years, all with joint publications, the proposed Network will create a uniquely powerful team for forefront research on chiral liquid crystals.The intellectual merit of the proposed activity derives from the technological importance of the proposed research, the broad range of fundamental scientific questions to be addressed, and the unique and complementary areas of expertise brought to bear through the joint efforts of the partner groups. The focus is on exotic chiral smectics: the "V-shaped switching" smectic C's with the most rapid analog liquid crystal electro-optic effects; the "deVries" materials exhibiting analog behavior via extended molecular tilt correlations in the smectic A phase; the closely related "orthoconic" high-tilt antiferroelectrics; and bent-core liquid crystals with a polar smectic A phase that give phase-only electrooptic modulation. The proposed research highlights fundamental studies of the relationships of these behaviors, investigations of novel liquid crystal systems with ramifications for a variety of areas in soft materials science. The corresponding materials development will enable a variety of novel applications, including holographic data storage and projection, beam steering, and chirality detection.The broader impacts of the proposed activity in the areas of education and industrial outreach and human resource development will be substantial, augmenting and enhancing ongoing programs in Boulder and the partner institutions. Exchange visits of junior researchers and faculty will promote cultural diversity and the professional development of the participants. The partner groups will share and adapt appropriate outreach materials, including modules for K-12 science enrichment classes. The liquid crystal materials to be investigated are promising candidates for applications in the areas of displays and optical beam steering. The Boulder group has a track record of substantive technology transfer including spin-off commercial ventures producing liquid crystal display products and scientific equipment. Given the wide variety of potential applications of the proposed research, it is likely that this collaboration will engender technology transfer to the private sector both in America and Europe.Further information on the proposed International Materials World interaction and anticipated benefits are discussed in the Supplementary Documents section at the end of this proposal.

科罗拉多大学博尔德分校、瑞典查尔默斯理工大学、德国斯图加特大学、加拿大女王大学和英国斯特拉斯克莱德大学的研究人员提出了一个显示快速模拟电光的手性/极性液晶的联合研究计划。科罗拉多大学的主要研究人员在液晶材料的合成、表征和建模方面拥有广泛的综合专业知识。他们在几个研究项目中进行合作，包括多学科液晶材料研究中心(LCMRC)，这是美国国家科学基金会的一个MRSEC。LCMRC是世界上研究极性和手性及其在凝聚相中相互作用的独特场所。拟议的材料世界网络合作伙伴在其国家资助机构的支持下，保持着类似但互补的手性液晶研究计划。该建议请求支持，以扩大与Chalmers和Stuttgart于1999年开始的密集联合材料研究计划，并于2006年作为材料世界网络提供资金。随着合成和理论研究的增加，所要求的资金将促进在一个令人兴奋的前沿液晶研究领域的合作，结合合作伙伴小组在以模拟极性/手性近晶液晶的基础科学和应用为主要总体主题的项目中的互补能力。尽管MWN合作伙伴的各种组合在过去几年中一直在单独合作，所有这些合作都是通过联合出版物进行的，但拟议的网络将为手性液晶的前沿研究创建一个独特而强大的团队。拟议活动的学术价值来自于拟议研究的技术重要性，需要解决的广泛基础科学问题，以及通过合作伙伴小组的共同努力带来的独特和互补的专业领域。重点放在奇异的手性近晶：具有最快模拟液晶电光效应的V型开关近晶C；通过扩展的分子倾斜关联在近晶A相中表现出类似行为的“DeVries”材料；密切相关的“正锥形”高倾斜反铁电体；以及具有极性近晶A相的弯芯液晶，它只提供相位电光调制。拟议的研究重点是这些行为之间关系的基础研究，以及对软材料科学中不同领域的新型液晶系统的研究。相应的材料开发将使各种新的应用成为可能，包括全息数据存储和投影、光束转向和手性检测。拟议的活动在教育和工业推广以及人力资源开发领域的更广泛影响将是巨大的，扩大和加强博尔德及其合作机构正在进行的计划。初级研究人员和教职员工的互访将促进参与者的文化多样性和专业发展。伙伴小组将分享和改编适当的宣传材料，包括K-12科学强化课程的单元。将被研究的液晶材料在显示和光束控制领域具有很好的应用前景。博尔德集团拥有大量技术转让的记录，包括剥离生产液晶显示产品和科学设备的商业企业。鉴于拟议研究的潜在应用范围广泛，这种合作很可能会产生向美国和欧洲私营部门的技术转让。关于拟议的国际材料世界互动和预期效益的进一步信息，将在本提案末尾的补充文件部分进行讨论。

项目成果

Orientational fluctuations near the smectic A to smectic C phase transition in two "de Vries"-type liquid crystals.

• DOI: 10.1002/cphc.201300358
• 发表时间: 2013-09
• 期刊: Chemphyschem : a European journal of chemical physics and physical chemistry
• 作者: D. Nonnenmacher;S. Jagiella;Qingxiang Song;R. Lemieux;F. Giesselmann

Design of liquid crystals with ‘de Vries-like’ properties: carbosilane-terminated 5-phenylpyrimidine mesogens suitable for chevron-free FLC formulations

具有类似“de Vries”特性的液晶设计：适合无 V 形 FLC 配方的碳硅烷封端 5-苯基嘧啶介晶

• DOI: 10.1039/c4tc00393d
• 发表时间: 2014
• 期刊: Journal of Materials Chemistry C
• 影响因子: 6.4
• 作者: C. P. J. Schubert;A. Bogner;J. H. Porada;K. Ayub;T. Andrea;F. Giesselmann;R. P. Lemieux
• 通讯作者: R. P. Lemieux

Electroclinic effect in a chiral carbosilane-terminated 5-phenylpyrimidine liquid crystal with 'de Vries-like' properties.

具有“德弗里斯样”性质的手性碳硅烷封端的 5-苯基嘧啶液晶中的电致效应

• DOI: 10.1039/c5cc05212b
• 发表时间: 2015
• 期刊: Chemical communications
• 影响因子: 4.9
• 作者: C. P. J. Schubert;C. Mueller;M. D. Wand;F. Giesselmann;R. P. Lemieux
• 通讯作者: R. P. Lemieux

Reliability of Orientational Order Parameters Determined from Two-dimensional X-ray Diffraction Patterns: A Simulation Study.

从二维 X 射线衍射图确定的取向序参数的可靠性：模拟研究

• DOI: 10.1002/cphc.201600050
• 发表时间: 2016
• 期刊: Chemphyschem : a European journal of chemical physics and physical chemistry
• 作者: F. Jenz;S. Jagiella;M. A. Glaser;F. Giesselmann
• 通讯作者: F. Giesselmann