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.

该学院早期职业发展（职业）计划拨款提供资金来研究新的制造方法，用于制造具有纳米长度尺度精确控制结构的大块材料。虽然纳米结构材料已从理论和热传输的角度进行了深入研究，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。先进的气相技术将用于合成具有精确控制特性的纳米粉末。将生产具有任意尺寸、尺寸分布、成分和表面化学性质的超细颗粒，然后烧结以产生具有可调节结构细节的块状样品。对纳米粒子特性的精确控制将转化为实现在纳米结构设计方面具有前所未有的自由度的块状纳米结构样品。具有任意设计的纳米结构的块状样品的表征将促进对热和电荷载体传输的科学理解在这样的系统中。将实现晶粒尺寸分布、孔隙率和晶界局部结构对输运特性的作用的精确描述。这些知识将可以转移到其他材料系统，并且对科学界有价值。此外，该项目特别关注地球上丰富的材料以及可扩展至高生产率的合成和加工技术，从而向大规模利用具有良好热电性能的材料迈出了一步，反之亦然，能源转换效率。这对于废热回收、固态冷却等应用以及一般情况下实现更有效地利用能源资源至关重要。最后，来自当地高中的学生、少数族裔的大学生以及正在继续接受教育的美军退伍军人将直接参与这些研究活动，以加强他们在材料、制造和能源等战略重要领域的教育。