Template-Assisted Nanoparticle Processing

模板辅助纳米颗粒加工

• 批准号: 0824741
• 负责人: Kathy Lu
• 金额: $ 28.75万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0824741&HistoricalAwards=false
• 关键词: Template; Assisted; Nanoparticle; Processing

Current top-down approach subtractively creates nano-features but the process is expensive. Bottom-up approach manipulates species at nanoscale but systematic and large scale assembly is non-existent. The objective of this project is to pioneer a novel template-assisted nanoparticle process in order to produce large surface area materials with hierarchical nanopatterns and nanostructures. Specifically, the program aims to obtain hierarchical nanopore patterns by combining focused ion beam pre-texturing and nano-patterning, understand nanoparticle colloid phase stability and separation for large area nanostructure creation, and formulate a quantitative characterization method in three dimensional sintering for large area nanostructure preservation and control. The template will direct the hierarchy and size distribution of the nanopatterns; the colloidal phase separation and quantitative sintering characterization will offer new and efficient approaches for nano-fabrication. The hierarchical nanopatterns are expected to deliver much enhanced properties. The materials to be used, TiO2 and ZnO, are the most desired candidates for photovoltaic solar cells, optoelectronics, novel chemical and biological sensors, and catalysts. The hierarchical nanostructures have direct and immediate impact on drastically increasing solar cell energy conversion efficiency and photoluminescence efficiency, among others. The research methodology has wide-ranging significance in multi-scale device integration while improving process reliability and producibility. For nano-education, the program is targeted at engineering-wise underrepresented females by actively recruiting and retaining female engineering students. Broader societal impact will also result from journal publications, conferences, and newsletters.

当前自上而下的方法以减法方式创建纳米特征，但该过程非常昂贵。自下而上的方法在纳米尺度上操纵物种，但系统和大规模的组装是不存在的。该项目的目标是开创一种新型模板辅助纳米颗粒工艺，以生产具有分层纳米图案和纳米结构的大表面积材料。具体而言，该项目旨在通过结合聚焦离子束预纹理和纳米图案来获得分层纳米孔图案，了解大面积纳米结构创建的纳米颗粒胶体相稳定性和分离，并制定大面积纳米结构三维烧结的定量表征方法保存和控制。模板将指导纳米图案的层次结构和尺寸分布；胶体相分离和定量烧结表征将为纳米制造提供新的、有效的方法。分层纳米图案预计将提供大大增强的性能。 所使用的材料 TiO2 和 ZnO 是光伏太阳能电池、光电子学、新型化学和生物传感器以及催化剂最理想的候选材料。分层纳米结构对大幅提高太阳能电池能量转换效率和光致发光效率等具有直接和直接的影响。该研究方法在多尺度器件集成方面具有广泛的意义，同时提高了工艺可靠性和可生产性。对于纳米教育，该计划通过积极招募和留住女性工程学生，针对工程方面代表性不足的女性。期刊出版物、会议和时事通讯也将产生更广泛的社会影响。