NIRT: Clusters to Nanoparticles: Implications for Atmospheric Nucleation

NIRT：簇到纳米粒子：对大气成核的影响

• 批准号: 0506674
• 负责人: Peter McMurry
• 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: 2005
• 资助国家: 美国
• 起止时间: 2005-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0506674&HistoricalAwards=false
• 关键词: NIRT; Clusters; Nanoparticles; Implications; Atmospheric

This project will attempt to experimentally elucidate the chemical and physical processes responsible for the formation of stable nuclei in the atmosphere, and to develop more realistic models for atmospheric particle nucleation. The approach depends on the development and refinement of two instrumental systems, a cluster chemical ionization mass spectrometer system and a nanoparticle scanning mobility spectrometer. These instruments will be used to measure the chemical composition of large, newly-nucleated clusters up to 1000 atomic mass units in size with a mass spectrometer. The instruments will simultaneously measure particle size distributions in the nano-particle range down to one nanometer, and physicochemical properties.The results of this research are expected to help address broad issues relating to the earth's albedo and radiation balance affected by aerosols at various altitudes in the atmosphere. Both instrument development and new insights in the formulation of nucleation phenomena will benefit other areas of nanoscale science. Students at both the graduate and undergraduate level will gain experience from this research activity.

该项目将试图通过实验阐明大气中形成稳定核的化学和物理过程，并开发更现实的大气粒子成核模型。该方法依赖于两个仪器系统的开发和改进，一个簇化学电离质谱仪系统和纳米粒子扫描迁移率光谱仪。这些仪器将被用于测量大的，新成核的集群的化学成分高达1000原子质量单位的大小与质谱仪。这些仪器将同时测量纳米颗粒的粒度分布和物理化学性质，预计这项研究的结果将有助于解决与大气中不同高度气溶胶影响的地球辐射和辐射平衡有关的广泛问题。无论是仪器的发展和新的见解，在制定成核现象将有利于其他领域的纳米科学。研究生和本科生将从这项研究活动中获得经验。