Crystallization dynamics of supersaturated NaCIO4 aerosols studied by high-speed photography

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2008,（14）
• 页码范围: 2139-2144
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11434-008-0284-7

摘要

Single supersaturated NaCl04 aerosol droplets on a quartz substrate were observed by a high-speed video camera for their morphologic changes with decreasing relative humidity (RH). The supersatu-rated droplets were found to form anhydrous NaCIO4 at -10% RH. Three stages were roughly observed in this process, i.e., the main stem appearance, primary and secondary branches growth, and the deep dehydration. The main stem grew steadily and finished in 120 ms. Affected by both crystal precipitation and water evaporation, primary branches grew for 1200 ms, accompanied by a slower growth of sec-ondary branches. The deep dehydration was more complicated, and lasted for a longer time.