Precision Monolayer Chemistry on Amorphous Materials

非晶材料的精密单层化学

• 批准号: 2108966
• 负责人: Shelley Claridge
• 金额: $ 45万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108966&HistoricalAwards=false
• 关键词: Precision; Monolayer; Chemistry; Amorphous; Materials

With support from the Macromolecular, Supramolecular, and Nanochemistry (MSN) Program in the Division of Chemistry, Shelley Claridge at Purdue University is studying fundamental processes that allow precise control over the surface chemistry of technologically important amorphous materials. If better understood, these processes could enable design and fabrication of surfaces with well-defined chemical instructions for processes ranging from the assembly of materials for solar energy conversion to materials that scaffold the growth of cells to repair injuries. In this project, the progress of a class of surface reactions will be monitored using specialized microscopes that enable imaging at the scale of individual molecules. This information is integrated with larger-scale experimental techniques including fluorescence microscopy, providing a molecular-to-a macroscopic view of the reaction progress. As part of this project, Dr. Claridge is working with graduate students in her research group and with minority-serving undergraduate institutions to develop a series of educational experiences and resources that help undergraduate students analyze and communicate scientific findings, as a foundation for their future careers in science. This project utilizes striped phases of functional alkyl diacetylenes known to assemble on graphite and other two-dimensional materials as a basis for functionalizing the surface of amorphous elastomeric materials such as polydimethylsiloxane (PDMS) that exhibit substantial nanoscale heterogeneity. In this strategy, the diacetylene monomers are assembled on graphite, photo-polymerized by irradiation with ultraviolet light, then covalently transferred to the PDMS surface using the hydrosilylation reaction that is the basis for PDMS curing. The first two aims of this project are to understand the relationship between diacetylene monomer structure and striped phase monolayer polymerization efficiency, and to understand the relationship between PDMS component structure (vinyl-functional base polymer and hydrosilyl groups in crosslinker) and reactivity with the striped polydiacetylene layer. The final stage of the process characterizes the function of monolayers on PDMS based on their ability to control isotropic and anisotropic particle adsorption. Understanding and control of the striped phase polydiacetylene polymerization reaction, transfer reaction, and surface functionality has to the potential to lead to surfaces that carry embedded chemical instructions for applications including wearable electronics, chromatography, and cell culture.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.

在化学系大分子、超分子和纳米化学（MSN）项目的支持下，普渡大学的Shelley Claridge正在研究能够精确控制技术上重要的非晶态材料表面化学的基本过程。如果能更好地理解这些过程，这些过程可以设计和制造具有明确化学指令的表面，用于从太阳能转换材料的组装到支架细胞生长以修复损伤的材料。在这个项目中，一类表面反应的进展将使用能够在单个分子尺度上成像的专用显微镜进行监测。这些信息与包括荧光显微镜在内的大规模实验技术相结合，提供了从分子到宏观的反应过程视图。作为该项目的一部分，克拉里奇博士正在与她的研究小组的研究生以及为少数民族服务的本科院校合作，开发一系列教育经验和资源，帮助本科生分析和交流科学发现，为他们未来的科学事业奠定基础。该项目利用已知在石墨和其他二维材料上组装的功能烷基二乙炔的条纹相作为非晶弹性体材料（如聚二甲基硅氧烷（PDMS））表面功能化的基础，这些材料表现出实质性的纳米级非均质性。在这种策略中，二乙炔单体被组装在石墨上，通过紫外光照射光聚合，然后通过硅氢化反应共价转移到PDMS表面，这是PDMS固化的基础。本项目的前两个目标是了解二乙炔单体结构与条纹相单层聚合效率的关系，以及PDMS组分结构（乙烯基功能基聚合物和交联剂中的氢硅基）与条纹聚二乙炔层反应性的关系。该过程的最后阶段表征了单层膜在PDMS上的功能，基于它们控制各向同性和各向异性颗粒吸附的能力。对条纹相聚二乙炔聚合反应、转移反应和表面功能的理解和控制，有可能导致表面携带嵌入式化学指令，用于可穿戴电子、色谱和细胞培养等应用。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。

项目成果

Nanometer-Scale Precision Polymer Patterning of PDMS: Multiscale Insights into Patterning Efficiency Using Alkyldiynamines

PDMS 的纳米级精密聚合物图案化：使用烷基二胺对图案化效率的多尺度洞察

• DOI: 10.1021/acsami.2c04534
• 发表时间: 2022
• 期刊: ACS Applied Materials & Interfaces
• 影响因子: 9.5
• 作者: Shi, Anni;Singh, Anamika;Williams, Laura O.;Arango, Juan C.;Claridge, Shelley A.
• 通讯作者: Claridge, Shelley A.

Plenty of Room at the Top: A Multi‐Scale Understanding of nm‐Resolution Polymer Patterning on 2D Materials

顶部有足够的空间：对 2D 材料上纳米分辨率聚合物图案的多尺度理解

• DOI: 10.1002/anie.202110517
• 发表时间: 2021
• 期刊: Angewandte Chemie International Edition
• 作者: Shi, Anni;Villarreal, Terry A.;Singh, Anamika;Hayes, Tyler R.;Davis, Tyson C.;Brooks, Jacob T.;Claridge, Shelley A.
• 通讯作者: Claridge, Shelley A.

Nanostructured Surface Functionalization of Polyacrylamide Hydrogels Below the Length Scale of Hydrogel Heterogeneity

• DOI: 10.1021/acsami.2c12034
• 发表时间: 2022-09-14
• 期刊: ACS APPLIED MATERIALS & INTERFACES
• 影响因子: 9.5
• 作者: Arango, Juan C.;Williams, Laura O.;Claridge, Shelley A.
• 通讯作者: Claridge, Shelley A.