Engineered Microfluidic Mixing for Green Nanocrystal Manufacturing

用于绿色纳米晶体制造的工程微流体混合

• 批准号: 0926969
• 负责人: Noah Malmstadt
• 金额: $ 27万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926969&HistoricalAwards=false
• 关键词: Engineered; Microfluidic; Mixing; Green; Nanocrystal

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).As novel applications for nanocrystalline materials continue to emerge, there is an increasing need for new approaches to manufacture these materials efficiently, at high yield, and with minimal damage to the environment. In this project, two green chemistry technologies?ionic liquid solvents and microfluidic reactors?are combined to engineer new approaches to nanocrystal synthesis. Ionic liquids are ideal for nanofabrication reactions because they can act both as solvents and as surface passivation ligands. Microfluidic systems are ideal because nanocrystal nucleation and growth processes are exquisitely sensitive to local conditions that can be engineered and controlled in microfluidic flows.Beyond the immediate advantages of green manufacture of nanomaterials, this work promises to provide novel insights to the role that mixing plays in controlling nanofabrication reactions. This system will allow for precise control of the timing of the nucleation and growth phases of nanocrystal formation, allowing for improved crystal homogeneity and better control over final morphology. Metal oxide nanocrystals are used as photocatalysts, piezoelectric and photovoltaic materials, and pigments. The green principles developed in this proposal are broadly applicable to manufacturing these materials, and will have correspondingly broad impacts. The proposed work includes an education and outreach program. At the high school level, the PI will work with the USC Center for Engineering Diversity to provide laboratory experiences for high school teachers from local schools. The co-PI will undertake an experimental outreach program to local community colleges.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。随着纳米晶材料的新应用不断出现，人们越来越需要新的方法来有效地制造这些材料，产量高，对环境的破坏最小。在这个项目中，两个绿色化学技术？离子液体溶剂和微流控反应器？结合在一起设计了新的合成方法。离子液体是纳米纤维反应的理想选择，因为它们既可以作为溶剂，又可以作为表面钝化配体。微流体系统是理想的，因为微流体成核和生长过程对局部条件非常敏感，可以在微流体流中设计和控制，除了纳米材料的绿色制造的直接优势外，这项工作有望为混合在控制纳米纤维反应中所起的作用提供新的见解。该系统将允许精确控制晶体形成的成核和生长阶段的时间，允许改善晶体均匀性和更好地控制最终形态。金属氧化物纳米晶体用作光催化剂、压电和光伏材料以及颜料。本提案中制定的绿色原则广泛适用于制造这些材料，并将产生相应的广泛影响。拟议的工作包括一项教育和外联方案。在高中阶段，PI将与南加州大学工程多样性中心合作，为当地学校的高中教师提供实验室经验。共同主要研究者将对当地社区学院进行一项实验性的外展计划。