In Situ Characterization of Ultrafine Chain Aggregate Aerosols Using Photo Correlation Spectroscopy

使用光相关光谱法对超细链聚集气溶胶进行原位表征

• 批准号: 9529359
• 负责人: David Shaw
• 金额: $ 15万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529359&HistoricalAwards=false
• 关键词: Situ; Characterization; Ultrafine; Chain; Aggregate

Abstract 9529359 D.T. Shaw, SUNY at Buffalo It is proposed to extend the application of the Photo Correlation Spectroscopy (PCS) technique to in-situ measurement of finer chain-like aggregation aerosols and to determine its operating conditions. Another objective is to obtain information on the time evolution of ultrafine particle and chain aggregate growth after establishing the limitations of the experimental technique. The results will be calibrated using Transmission Electron Microscopy (TEM) on aerosol samples to determine both particle/chain size and shape distributions. A stable and reproducible chain aggregate iron oxide aerosol generator will be used. The PCS laser beam will be focused to a small beam width of about 100 microns, and its position will be varied at different distances from the aerosol source in order to monitor the evolution of particle aggregate size. The work has special relevance to on-line measurements and control in industry, in laboratory experiments, as well as for testing theoretical models for particle grow. ***

摘要：本文提出将光相关光谱（PCS）技术扩展到更细的链状聚集气溶胶的原位测量，并确定其工作条件。另一个目标是在确定实验技术的局限性后，获得超细颗粒和链聚集体生长的时间演化信息。结果将使用透射电子显微镜（TEM）对气溶胶样品进行校准，以确定颗粒/链的大小和形状分布。将使用稳定且可重复的链式聚合氧化铁气溶胶发生器。PCS激光束将被聚焦到约100微米的小光束宽度，并在离气溶胶源不同距离处改变其位置，以监测颗粒聚集体大小的演变。这项工作特别适用于工业、实验室实验中的在线测量和控制，以及测试粒子生长的理论模型。＊＊＊