CAREER: Synthesis of Bulk Nanostructured Materials from Semiconductor Quantum Dots

职业：从半导体量子点合成块状纳米结构材料

• 批准号: 1351386
• 负责人: Lorenzo Mangolini
• 金额: $ 40万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1351386&HistoricalAwards=false
• 关键词: CAREER; Synthesis; Bulk; Nanostructured; Materials

This Faculty Early Career Development (CAREER) Program grant provides funding to investigate new manufacturing approaches for the fabrication of bulk-scale materials with precisely controlled structure at the nanometer length scale. While nanostructured materials have been intensively investigated from the theoretical and thermal transport points of view, limitations in their processing science have impeded their commercial use. This project aims at overcoming these limitations. Advanced gas-phase techniques will be used to synthesize nanopowders with precisely controlled properties. Ultrafine particles with arbitrary size, size distribution, composition and surface chemistry will be produced and then sintered to yield bulk samples with tunable structural details. The precise control of the nanoparticle properties will translate into the realization of bulk nanostructured samples with an unprecedented degree of freedom in the design of their nanostructure.The characterization of bulk samples with arbitrarily designed nanostructure will advance the scientific understanding of transport of heat and charge carriers in such systems. A precise description of the role of grain size distribution, porosity and local structure of grain boundaries on transport properties will be achieved. This knowledge will be transferrable to other material systems and valuable to the scientific community. Moreover, the project specifically focuses on earth-abundant materials and on synthesis and processing techniques that are scalable to high production rates, thus representing a step towards the large-scale utilization of materials with good thermal-to-electrical, and vice versa, energy conversion efficiency. This is critical for applications such as waste heat recovery, solid state cooling, and in general, for achieving a more effective utilization of our energy resources. Finally, students from local high schools, college students from underrepresented minorities and veterans from the US military who are continuing their educations will be directly involved in these research activities to enhance their education in the strategically important areas of materials, manufacturing and energy.

这项教师早期职业发展（职业）计划赠款提供了资金，以调查以纳米长度量表精确控制结构的散装规模材料的新制造方法。虽然从理论和热运输的角度研究了纳米结构的材料，但其加工科学的局限性阻碍了其商业用途。该项目旨在克服这些限制。高级气相技术将用于合成具有精确控制特性的纳米植物。将产生具有任意尺寸，尺寸分布，组成和表面化学反应的超铁颗粒，然后烧结以产生具有可调结构细节的散装样品。纳米颗粒性能的精确控制将转化为实现纳米结构时具有前所未有的自由度的散装纳米结构样品。具有任意设计的纳米结构的散装样品的表征将推进这种系统中热和电荷载体的科学理解。将实现晶粒尺寸分布，孔隙率和晶界局部结构在运输特性中的作用的精确描述。这些知识将可以转移到其他物质系统，并对科学界有价值。此外，该项目专门针对地球丰富的材料以及可扩展到高生产率的合成和加工技术，从而代表了朝着具有良好热量到电气的大规模利用迈出的一步，而能量转换效率。这对于诸如废热，固态冷却以及通常可以更有效地利用我们的能源的应用至关重要。最后，来自当地高中的学生，来自代表性不足的少数民族和来自美国军方的退伍军人的大学生将直接参与这些研究活动，以增强其在战略性重要的材料，制造和能源领域的教育。