Deciphering and Directing Hierarchical Self-Assembly in Hybrid Chiral Films

该项目由材料研究部的固态和材料化学项目资助，探索了令人兴奋的材料化学领域，特别侧重于从微小的纳米级构建块（称为胶体无机魔法大小的团簇（MSCs））中开发自组装材料。这些间充质干细胞由纤维中间相的有机骨架结合，形成了一种理想的杂化材料，其中无机和有机成分的比例几乎相等。最近的研究表明，它们能够自组织成复杂的层次结构，并显示出有趣的光学特性。这些发现为理解和操纵这种混合材料的自组装开辟了新的途径。该项目的目标是探索这些杂化材料的化学形成机制，重点研究其纤维支架骨架，并修改其组成以覆盖更广泛的光谱范围。这项研究有望显著推进材料化学的知识，特别是在混合材料的控制和组织方面。它探索了自组装的基本原理，可能会导致新的合成方法和对自然自组装系统的更深入的了解。这项研究的社会效益是多方面的。例如，光学超材料在传感器、能量存储和生物医学等先进技术中具有潜在的应用。该项目还侧重于教育和多样性方面，包括指导科学领域代表性不足的群体，制定外展计划，以及制作教育材料以激励未来的科学家。将研究与教育和推广相结合，确保该项目不仅促进科学知识的发展，而且还有助于国家健康、繁荣、福利和多样化、熟练劳动力的教育。材料化学的一个独特目标是利用纳米级的构建块开发自组装的分层材料。破译这些系统中结构和特性之间复杂的相互作用是先进光学器件合理设计的关键推动因素，并为模拟自然界中发现的复杂结构铺平了道路。在可以使用的合成构建块中，胶体、无机魔术大小的团簇（MSCs）成为令人信服的候选者。该项目由材料研究部固态和材料化学项目资助，主要目的是阐明msc基材料的形成机制，特别是研究这些簇内的化学相互作用如何导致纤维自组织和由此产生的独特性能。这些研究的实验方法包括修改MSCs的化学成分，特别是针对有机支架成分，以了解其在纤维中间期形成中的作用。该项目还将开发一个可见光范围内的光学活性薄膜库。通过关注纳米粒子自组装的基本方面以及化学成分和物理性质之间的相互作用，该项目旨在为材料化学领域做出重大贡献，特别是在混合纳米材料领域。从这项研究中获得的理解可能对合成具有定制光学和结构特性的新型材料具有更广泛的意义。研究结果具有广泛的社会影响，包括在先进技术中的潜在应用。该项目还致力于教育和多样性，指导代表性不足的群体，开发教育资源，与美国国家科学基金会推进科学、国家健康、繁荣和福利的使命保持一致。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

NON-TECHNICAL SUMMARYThis project, funded by the Solid State and Materials Chemistry program in the Division of Materials Research, explores the exciting realm of materials chemistry, specifically focusing on the development of self-assembling materials from tiny, nanoscale building blocks known as colloidal, inorganic magic-sized clusters (MSCs). These MSCs are bound by an organic backbone within a fibrous mesophase, forming an ideal hybrid material where the inorganic and organic components are nearly equal in proportion. Recent work revealed their ability to self-organize into complex, hierarchical structures, displaying intriguing optical characteristics. These findings open up new avenues in understanding and manipulating the self-assembly of such hybrid materials. The goal of the project is to explore the chemical formation mechanisms of these hybrid materials, focusing on their fibrous scaffold backbone, and modifying their composition to cover a wider range of the optical spectrum. This research is poised to significantly advance knowledge in materials chemistry, particularly in the control and organization of hybrid materials. It explores the fundamental principles of self-assembly, potentially leading to new synthetic methods and deeper insights into natural self-assembling systems. The societal benefits of this research are manifold. Optical metamaterials, for instance, have potential applications in advanced technologies like sensors, energy storage, and biomedicine. This project also focuses on educational and diversity aspects, including mentoring underrepresented groups in science, developing outreach programs, and creating educational materials to inspire future scientists. The integration of research with education and outreach ensures that this project not only advances scientific knowledge but also contributes to the national health, prosperity, welfare, and the education of a diverse, skilled workforce.TECHNICAL SUMMARYA distinct goal of materials chemistry is to develop self-assembling hierarchical materials from nanoscale building blocks. Deciphering the intricate interplay between structure and property in these systems stands as a pivotal enabler for the rational design of advanced optical devices and paves a pathway towards emulating the structural sophistication found in nature. Among the synthetic building blocks that could be used, colloidal, inorganic magic-sized clusters (MSCs) emerge as compelling candidates. The main objective of this project, funded by the Solid State and Materials Chemistry program in the Division of Materials Research, is to elucidate the formation mechanisms of MSC-based materials, particularly investigating how chemical interactions within these clusters lead to fibrous self-organization and the resulting unique properties. The experimental approach for these investigations includes modifying the chemical composition of the MSCs, specifically targeting the organic scaffold component, to understand its role in the fibrous mesophase formation. The project will also develop a library of optically active films within the visible range. By focusing on the fundamental aspects of nanoparticle self-assembly and the interplay between chemical composition and physical properties, this project aims to contribute significantly to the field of materials chemistry, specifically in the area of hybrid nanomaterials. The understanding gained from this research could have broader implications for the synthesis of novel materials with tailored optical and structural properties. The outcomes have wide-ranging societal implications, including potential applications in advanced technologies. The project also commits to education and diversity, mentoring underrepresented groups, and developing educational resources, aligning with NSF's mission to advance science, national health, prosperity, and welfare.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.