Micro- and Nano-Scale Anisotropic Organic Materials via Self-Organization of Lyotropic Chromonic Liquid Crystals

通过溶致变色液晶自组织的微米和纳米尺度各向异性有机材料

• 批准号: 0405532
• 负责人: Suk-Wah Tam-Chang
• 金额: $ 43.21万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0405532&HistoricalAwards=false
• 关键词: Micro; Nano; Scale; Anisotropic; Organic

This research project aims to explore novel "bottom-up" approaches to generating micropatterns of anisotropic organic materials by exploiting the selforganization of chromonic liquid crystals on templates. Ultimately, these approaches will be extended to the fabrication of nanopatterned anisotropic organic materials. This research will provide important education and training to undergraduate and graduate students in materials chemistry. The specific objectives of this research are: 1) To further our understanding of the structure-property relationships of ionic aromatic compounds and to strive to reveal the structural factors governing supramolecular interactions, optical properties, and phase properties (especially the lyotropic chromonic liquid-crystalline (LC) phase and the crystalline phase); 2) To design and synthesize long-wavelength and near infrared (NIR) absorbing compounds that self-organize into a chromonic LC phase or a crystalline phase; 3) To develop novel approaches to the micro-and nano-fabrication of functional anisotropic (direction-dependent) materials by exploiting the supramolecular interactions of the molecular constitutents, to study the properties of these materials, and to explore their potential applications. The research will focus on using aromatic compounds that possess dichroic, fluorescent, and semiconducting properties as the molecular constituents; 4) To continue with efforts on integrating materials chemistry into organic chemistry research and education.%%%Society's demand for diverse and bright colors continues to drive research on chromophore systems. The design and synthesis of dichroic and fluorescent dyes and the control of their molecular order in materials is an important and useful proposition. Many useful materials (e.g., dichroic polarizers) and devices (e.g., liquid crystal displays) depend on the self-organization of organic compounds into an ordered crystalline phase or a LC phase at some step in the manufacturing process or during the functioning of the device. The knowledge gained from this research could further polarization and display technologies. In addition to potential uses in the microelectronics field, micropatterned anisotropic materials may have applications as holographic films, as viewing angle-dependent optical materials, and in stereoscopic displays. The development of novel approaches to generating nanopatterns of anisotropic organic materials may offer new opportunities to the rapidly advancing fields of nanoscience and nanotechnology. Furthermore, the success of this research will broadly impact society because of the important uses of long-wavelength dyes and NIR materials that range from basic science to high technology applications. As new classes of organic materials highly relevant to developing technologies are rapidly emerging, there is an increasing demand in both industry and academia for students trained in various aspects of organic and materials research. This integrated teaching and research program introduces to students the basic knowledge and techniques for studying organic materials and provides research opportunities to both graduate and undergraduate students (including underrepresented groups) preparing them for a career that may include organic materials research, and improving their access to a teaching career in science. Modern scientific instrumentation is also an essential tool for science education and training. The equipment requested for this research will strengthen the infrastructure for education and research at the University of Nevada, Reno.

本研究计划旨在探索新颖的“自下而上”的方法，通过利用模板上的有色液晶的自组织来生成各向异性有机材料的微图案。 最终，这些方法将扩展到纳米图案化各向异性有机材料的制造。 本研究将为材料化学专业的本科生和研究生提供重要的教育和培训。 本研究的具体目标是：1）加深对离子型芳香族化合物结构-性质关系的理解，努力揭示影响超分子相互作用、光学性质和相性质的结构因素（特别是溶致发色液晶（LC）相和结晶相）; 2）设计和合成自组织成有色LC相或结晶相的长波长和近红外（NIR）吸收化合物; 3）开发新的方法来微和纳米制造功能各向异性利用分子间的超分子相互作用，研究了方向依赖材料的性质，并探讨了其潜在的应用。 该研究将集中于使用具有二色性、荧光和半导体性质的芳香族化合物作为分子组分; 4）继续努力将材料化学融入有机化学研究和教育。社会对多样和明亮颜色的需求继续推动对发色团系统的研究。 二色性和荧光染料的设计、合成及其在材料中的分子有序性控制是一个重要而有用的命题。 许多有用的材料（例如，二向色偏振器）和器件（例如，液晶显示器）取决于有机化合物在制造过程中的某个步骤或在器件运行期间自组织成有序结晶相或LC相。 从这项研究中获得的知识可以进一步发展偏振和显示技术。 除了在微电子领域中的潜在用途之外，微图案化的各向异性材料可以具有作为全息膜、作为视角依赖的光学材料和在立体显示器中的应用。 开发新的方法来产生各向异性有机材料的纳米片，可能会提供新的机会，迅速发展的纳米科学和纳米技术领域。 此外，这项研究的成功将广泛影响社会，因为从基础科学到高科技应用的长波长染料和近红外材料的重要用途。 随着与发展中技术高度相关的有机材料的新类别迅速出现，工业界和学术界对在有机和材料研究的各个方面接受过培训的学生的需求越来越大。 这个综合的教学和研究计划向学生介绍了研究有机材料的基本知识和技术，并为研究生和本科生（包括代表性不足的群体）提供研究机会，为他们的职业生涯做好准备，其中可能包括有机材料研究，并提高他们在科学方面的教学生涯。 现代科学仪器也是科学教育和培训的重要工具。 这项研究所需的设备将加强里诺的内华达州大学的教育和研究基础设施。