CAREER: Directed Nanoparticle Growth by Oriented Aggregation and Elucidating the Link between Reactivity and Particle Size, Shape, and Microstructure

职业：通过定向聚集定向纳米颗粒生长并阐明反应性与颗粒尺寸、形状和微观结构之间的联系

• 批准号: 0346385
• 负责人: R. Lee Penn
• 金额: --
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-02-15 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0346385&HistoricalAwards=false
• 关键词: CAREER; Directed; Nanoparticle; Growth; Oriented

Professor R. Lee Penn of the University of Minnesota-Twin Cities is supported by the Analytical and Surface Chemistry Program and the Geology and Paleontology program to investigate the formation of crystalline, nanometer-scale, transition metal oxides and hydroxides through the mechanism of oriented aggregation. This mechanism involves the assembly of primary crystals by attachment through specific crystallographic planes. Emphasis is on the control of orientated aggregation through manipulation of crystal surface properties. In addition to nanoparticle growth, chemical properties of these materials are probed through the study of dissolution and redox reactions. Particle structure is determined primarily by x-ray diffraction, electron microscopy and photon correlation spectroscopy measurements. Professor Penn is also developing a program for middle school students and science educators designed to enhance awareness of the structure of materials at the atomic level. Laboratory exercises that center on crystal growth and characterization are implemented to assist students and educators in understanding relationships between the macroscopic properties of materials and the underlying atomic level structure. Studies of inorganic oxide crystal growth and crystal decomposition through dissolution and redox reactions is providing insights into processes that affect the natural environment through atmospheric and geological chemistry. The education plan is providing learning opportunities for middle school age students and educators to enhance awareness of relationships between bulk materials properties and atomic level structure.

R教授明尼苏达大学双城分校的Lee Penn得到了分析和表面化学项目以及地质学和古生物学项目的支持，通过定向聚集机制研究了晶体，纳米级过渡金属氧化物和氢氧化物的形成。 这种机制涉及通过特定晶面附着的初级晶体的组装。 重点是通过操纵晶体表面性质来控制取向聚集。 除了纳米颗粒的生长，这些材料的化学性质通过溶解和氧化还原反应的研究来探讨。 颗粒结构主要通过X射线衍射、电子显微镜和光子相关光谱测量来确定。 佩恩教授还在为中学生和科学教育工作者开发一个项目，旨在提高人们对原子水平材料结构的认识。 以晶体生长和表征为中心的实验室练习旨在帮助学生和教育工作者理解材料的宏观性质与底层原子水平结构之间的关系。 通过溶解和氧化还原反应对无机氧化物晶体生长和晶体分解的研究为通过大气和地质化学影响自然环境的过程提供了见解。 该教育计划为中学生和教育工作者提供学习机会，以提高对散装材料性质和原子级结构之间关系的认识。