Thermal Field-Flow Fractionation of Nanoscale Materials

纳米材料的热场流分级

• 批准号: 1013029
• 负责人: Kim Williams
• 金额: $ 35万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1013029&HistoricalAwards=false
• 关键词: Thermal; Field; Flow; Fractionation; Nanoscale

With support from the Chemical Measurement and Imaging Program, Prof. Kim Williams and her group at the Colorado School of Mines seek increased understanding of the relationship between thermal diffusion and analyte-solvent parameters in the context of thermal field-flow fractionation (ThFFF), with aims of developing methods that address new measurement challenges posed by nanoscale materials. Extensive systematic studies with different polymer chemistries and architectures (linear chains, combs, dendrimers, stars, and bottle brushes) and nanoparticles functionalized with these polymers are included, as are new ThFFF channel designs that can significantly reduce analysis times and energy consumption while providing a potential route to semipreparative scale separations. The ability to collect larger amounts of well defined narrow dispersity polymers and nanoparticles will be a boon to unraveling property-function relationships.The proposed activities will advance knowledge and understanding within analytical chemistry and across different fields. Through the development of novel analytical methods for nanoscale materials, this project can impact diverse areas such as separations, synthesis of new materials, and renewable energy. The ability to monitor reactions will provide insight into synthesis pathways and facilitate reaction optimization for targeted products. Understanding the relative role of specific nanomaterials properties in controlling end properties (e.g., the influence of nanoparticle size and surface chemistry on photoconversion efficiencies) will facilitate the design of novel nanostructures for solar cells. The program includes an outreach component geared towards K-12 science education in two Denver school districts with high numbers of minority and disadvantaged students.

在化学测量和成像项目的支持下，科罗拉多矿业学院的金威廉姆斯教授和她的小组寻求在热场流分馏（ThFFF）的背景下增加对热扩散和分析物溶剂参数之间关系的理解，目的是开发解决纳米材料带来的新测量挑战的方法。 广泛的系统研究与不同的聚合物化学和架构（线性链，梳，树枝状聚合物，星，和瓶刷）和纳米粒子功能化与这些聚合物，因为是新的ThFFF通道设计，可以显着减少分析时间和能源消耗，同时提供了一个潜在的路线，半制备规模的分离。收集大量定义明确的窄分散性聚合物和纳米颗粒的能力将是解开性质-功能关系的一个布恩。拟议的活动将促进分析化学和跨不同领域的知识和理解。通过开发纳米材料的新分析方法，该项目可以影响不同的领域，如分离，新材料的合成和可再生能源。 监测反应的能力将提供对合成途径的深入了解，并促进目标产物的反应优化。了解特定纳米材料特性在控制最终特性方面的相对作用（例如，纳米颗粒尺寸和表面化学对光转换效率的影响）将促进用于太阳能电池的新型纳米结构的设计。该计划包括一个面向丹佛两个少数族裔和弱势学生较多的学区的K-12科学教育的外展部分。