期刊
APPLIED OPTICS
卷 54, 期 31, 页码 F174-F181出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.54.00F174
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- U.S. Defense Threat Reduction Agency (DTRA)
We have recently made advancements in a linear electrodynamic quadrupole (LEQ) device for capturing and levitating either single or multiple micro-particles that provides significant improvements in capture efficiency, reliability, and optical measurement access. We have used our LEQ to trap particles ranging from 30 to less than 0.5 mu m in size and provide a controlled environment to study particle physical/chemical dependencies on temperature, relative humidity, and gas constituents. To demonstrate this approach, we present data and analysis of liquid-droplet evaporation rates for two materials: glycerol and dibutyl sebacate. Droplet size was monitored as a function of time by two independent optical methods: direct imaging and fixed-angle light scattering. This new approach provides a means to rapidly characterize a wide range of aerosol particle properties and a platform for development of new aerosol optical-diagnostic measurements. (C) 2015 Optical Society of America
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