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Directed nanoparticle growth by oriented aggregation

通过定向聚集实现纳米颗粒的定向生长

基本信息

批准号：
0957696
负责人：
R. Lee Penn
金额：
$ 37.7万
依托单位：
University of Minnesota-Twin Cities
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2010
资助国家：
美国
起止时间：
2010-04-15 至 2014-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0957696&HistoricalAwards=false
关键词：
Directed nanoparticle growth oriented aggregation

项目摘要

In this project funded by the Macromolecular, Supramolecular and Nanochemistry Program of the Chemistry Division, R. L. Penn of the University of Minnesota will seek to understand the fundamental chemical principles underlying nanoparticle crystal growth by the oriented aggregation mechanism. The approach is to utilize an array of scattering and microscopy techniques to study nanocrystal growth as a function of reaction conditions and time. In particular, four key hypotheses will be tested regarding the effects of surface charge, passivating agents, poor crystal faceting, and sequential reaction solution changes upon the structures and compositions of the resulting nanocrystals. The broader impacts involve training undergraduate students, graduate students, and postdoctoral researchers, disseminating research results, enhancing infrastructure for research and education through remote viewing of live microscopy in the classroom, and developing a laboratory module on nanocrystals for high school and middle school classes.This work will expand our understanding about how to grow particles with dimensions on the order of one billionth of a meter with a high degree of control over structure and composition. The results of these studies could have many important long term impacts on nanotechnology fields in which nanoparticles are used, including medical imaging, display materials, and photovoltaics.

本课题由化学系高分子、超分子和纳米化学项目资助。L.明尼苏达大学的Penn将寻求通过定向聚集机制来理解纳米颗粒晶体生长的基本化学原理。该方法是利用一系列的散射和显微镜技术来研究作为反应条件和时间的函数的晶体生长。特别是，四个关键的假设将进行测试的影响，表面电荷，钝化剂，不良的晶体刻面，和顺序反应溶液的变化后，所得纳米晶体的结构和组成。更广泛的影响包括培训本科生，研究生和博士后研究人员，传播研究成果，通过在课堂上远程观看实时显微镜来加强研究和教育的基础设施，这项工作将扩大我们对如何生长尺寸为十亿分之一米的粒子的理解具有对结构和组成的高度控制。这些研究的结果可能会对纳米粒子使用的纳米技术领域产生许多重要的长期影响，包括医学成像，显示材料和光化学。