October 24, 2011 16:15 - 17:15
Empa, Dübendorf, Theodor-Erismann-Auditorium, VE102
Micro- and nanoparticles are ubiquitous in natural and man-made environments. When airborne, they are called aerosols. They may pose climatic impacts as well as health hazards where in general the effects are greater for submicrometer and nanoparticles. Moreover, particles with those sizes are also of substantial interest due to a variety of potential industrial applications. Especially nanoparticles are important precursors for the formation of larger particles and structures. Among first steps towards understanding of aerosol systems are experimental procedures. The application of an appropriate technique to measure relevant aerosol parameters is the essential issue in gaining information about particles properties and getting an insight into processes determining the behavior and fate of aerosols. Scattered light methods allow a direct, real-time aerosol measurement, however their measuring ability decreases with decreasing particle size. When it comes to real-time measurement of nanoparticles the utilization of electrical mobility of a charged particle in an electrostatic field seems to be among the best and convenient approaches currently available. In this lecture selected scattered light techniques and electrical mobility based methods for aerosol measurement covering about four orders of magnitude in particle size will be presented and their feasibility proven with examples.
The language of the presentation is English.
Free entrance, guests are welcome
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Dr. Anne Satir
Tel: 058 765 4562