Chemical Characterization of Ultrafine Aerosol Particles

超细气溶胶颗粒的化学表征

• 批准号: 0098831
• 负责人: Murray Johnston
• 金额: $ 36.3万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098831&HistoricalAwards=false
• 关键词: Chemical; Characterization; Ultrafine; Aerosol; Particles

Professor Murray Johnston of the University of Delaware is supported by the Analytical and Surface Chemistry and Atmospheric Chemistry Programs for his research on chemical characterization of ultrafine aerosol particles. The work will develop a new analytical approach for ultrafine particle analysis, particularly those smaller than 10 nm. Laser desorption photoionization of aerosols collected on a plate will be demonstrated with aerosols in the 20-50 nm range. Ultimately, ambient aerosols in 5 nm range will be studied. The results will be compared to single particle analysis where possible. The characterization of aerosols and study of their formation and growth is an unsolved problem in condensed phase chemistry and atmospheric science. Understanding aerosols is key to accurate modeling of the atmosphere and prediction of global climate change. It is also important to study nanodroplets for their implications on health. Ultrafine particles are more harmful to breathe because they penetrate deeper into the lungs.

特拉华州大学的Murray约翰斯顿教授因其对超细气溶胶颗粒的化学表征的研究而得到分析和表面化学以及大气化学计划的支持。 这项工作将为超细颗粒分析，特别是小于10 nm的颗粒分析开发一种新的分析方法。将用20-50 nm范围内的气溶胶演示板上收集的气溶胶的激光解吸光电离。最终，将研究5 nm范围内的环境气溶胶。在可能的情况下，将结果与单颗粒分析进行比较。 气溶胶的表征及其形成和增长的研究是凝聚相化学和大气科学中尚未解决的问题。了解气溶胶是精确模拟大气和预测全球气候变化的关键。 研究纳米液滴对健康的影响也很重要。 超细颗粒物对呼吸更有害，因为它们能更深地渗透到肺部。