Bimodal Ligand Architectures for (Nano)particle Assembly Structures with Increased Strength and Fracture Resistance

用于（纳米）颗粒组装结构的双峰配体结构，具有更高的强度和抗断裂性

• 批准号: 1663305
• 负责人: Michael Bockstaller
• 金额: $ 34.5万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-04-01 至 2021-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1663305&HistoricalAwards=false
• 关键词: Bimodal; Ligand; Architectures; Nano; particle

When matter is confined to a very small volume in the form of "nanomaterials", novel physical properties emerge. For example, nanomaterials have been shown to exhibit tunable optical, electronic or magnetic properties that could transform technologies ranging from energy storage and generation, electronic products, chemical industrial processes or medical diagnostics. It is still difficult, however, to fabricate products or devices out of nanoparticles due to the present rudimentary knowledge of how nanoparticles interact. This difficulty in processing nanomaterials presents a barrier to their industrial utilization in new nanomaterial technologies. This award supports fundamental research to provide the needed knowledge for the fabrication of nanomaterials that can be readily processed into technology relevant form. The research involves the development and modification of particle surfaces that allow particles to form stronger and fracture resistant material products. In collaboration with a PA-based start-up company, such new nanomaterial assemblies will be utilized and tested through the fabrication of luminescent panels that are important for next-generation active displays. The program will broaden the participation of minority students and provide cross-disciplinary training for one graduate and several undergraduate students in the critical area of nanotechnology that is of key strategic relevance for securing the future innovativeness and economic strength of the US. The assembly of nanoparticles into solid assembly structures, which are often referred to as "particle solids", plays a central role in the integration of nanoparticle systems into device architectures for applications ranging from photovoltaics to solid state lighting. A major barrier in the scalable production of self-assembled particle solid structures is the brittle nature of particle solids that promotes crack formation during the processing and integration of particle assemblies. The goal of this project is to test the hypothesis that that the grafting of bimodal polymeric ligands provides a path towards particle solids with high inorganic content and significantly enhanced mechanical properties and processibility. The research plan is organized into three subsequent research thrusts that will successively focus on (1) the synthesis of a library of bimodal polymer-tethered particle model systems, (2) the elucidation of the effect of bimodal brush composition and chain asymmetry on the mechanical and structural characteristics of particle solids, and (3) the extension of the bimodal brush approach to quantum dot (QD) systems to facilitate the solventless forming of polymer-embedded quantum dot heterostructures with enhanced structural control. The extension of the bimodal brush particle concept to QD-solids will test the generalizability of results and provide a foundation for the future development of QD/polymer-composite technologies.

当物质以“纳米材料”的形式被限制在非常小的体积内时，新的物理特性就会出现。例如，纳米材料已被证明具有可调的光学、电子或磁性，可以改变能源储存和发电、电子产品、化学工业过程或医疗诊断等技术。然而，由于目前对纳米粒子如何相互作用的基本知识，用纳米粒子制造产品或设备仍然很困难。加工纳米材料的这一困难阻碍了纳米材料在新的纳米材料技术中的工业利用。该奖项支持基础研究，为纳米材料的制造提供所需的知识，这些纳米材料可以很容易地加工成技术相关的形式。该研究涉及颗粒表面的开发和改性，使颗粒形成更坚固和抗断裂的材料产品。通过与一家位于PA的初创公司合作，这种新的纳米材料组件将通过制造对下一代有源显示器至关重要的发光面板进行利用和测试。该计划将扩大少数民族学生的参与，并为一名研究生和几名本科生提供纳米技术关键领域的跨学科培训，这对确保美国未来的创新和经济实力具有关键的战略意义。 将纳米颗粒组装成固体组装结构（通常称为“颗粒固体”）在将纳米颗粒系统整合到用于从光致发光到固态照明的应用的器件架构中起着核心作用。自组装颗粒固体结构的可规模化生产中的主要障碍是颗粒固体的脆性，其在颗粒组件的加工和整合期间促进裂纹形成。本项目的目标是测试的假设，即双峰聚合物配体的接枝提供了一条通往颗粒固体与高无机含量和显着增强的机械性能和加工性的路径。研究计划分为三个后续的研究重点，将依次集中在（1）双峰聚合物拴系颗粒模型系统库的合成，（2）双峰刷组成和链不对称性对颗粒固体的机械和结构特性的影响的阐明，以及（3）将双峰刷方法扩展到量子点（QD）系统以促进无溶剂形成具有增强的结构控制的聚合物嵌入的量子点异质结构。双峰刷状粒子的概念扩展到量子点固体将测试结果的普遍性，并为量子点/聚合物复合材料技术的未来发展提供了基础。

项目成果

Disentangling the Role of Chain Conformation on the Mechanics of Polymer Tethered Particle Materials

• DOI: 10.1021/acs.nanolett.9b00817
• 发表时间: 2019-04-01
• 期刊: NANO LETTERS
• 影响因子: 10.8
• 作者: Midya, Jiarul;Cang, Yu;Fytas, George
• 通讯作者: Fytas, George

Molecular Parameters Governing the Elastic Properties of Brush Particle Films

• DOI: 10.1021/acs.macromol.9b01809
• 发表时间: 2020-02-25
• 期刊: MACROMOLECULES
• 影响因子: 5.5
• 作者: Lee, Jaejun;Wang, Zongyu;Bockstaller, Michael R.
• 通讯作者: Bockstaller, Michael R.

Control of Dispersity and Grafting Density of Particle Brushes by Variation of ATRP Catalyst Concentration

• DOI: 10.1021/acsmacrolett.9b00405
• 发表时间: 2019-07-01
• 期刊: ACS MACRO LETTERS
• 影响因子: 7.015
• 作者: Wang, Zongyu;Yan, Jiajun;Matyjaszewski, Krzysztof
• 通讯作者: Matyjaszewski, Krzysztof

Transparent and High Refractive Index Thermoplastic Polymer Glasses Using Evaporative Ligand Exchange of Hybrid Particle Fillers

• DOI: 10.1021/acsami.6b12666
• 发表时间: 2017-03-01
• 期刊: ACS APPLIED MATERIALS & INTERFACES
• 影响因子: 9.5
• 作者: Wang, Zongyu;Lu, Zhao;Bockstaller, Michael R.
• 通讯作者: Bockstaller, Michael R.

Synthesis and characterization of gibbsite nanoplatelet brushes by surface-initiated atom transfer radical polymerization

表面引发原子转移自由基聚合三水铝石纳米片刷的合成与表征

• DOI: 10.1016/j.polymer.2017.08.028
• 发表时间: 2017
• 期刊: Polymer
• 影响因子: 4.6
• 作者: Zhang, Jianan;Lee, Jaejun;Wang, Zongyu;Yan, Jiajun;Lu, Zhao;Liu, Siyuan;Luo, Danli;Matyjaszewski, Krzysztof;Bockstaller, Michael R.
• 通讯作者: Bockstaller, Michael R.