Characterization of Individual Aerosol Particles and Sampling Artefacts by Nanosims
نویسندگان
چکیده
Atmospheric and work place aerosol particles are frequently heterogeneous on a nanometer scale (e.g., Ebert et al., 2002; Weinbruch et al., 2002). Up to now, these heterogeneities could only be studied by transmission electron microscopy (TEM). Recently, secondary ion mass spectrometry (SIMS) was extended to the nanometer scale, making this new technique (NanoSIMS) a very attractive tool for the characterization of individual particles. In principle, it is possible to analyze all elements including hydrogen with detection limits often in the ppb-range. In addition, it is also possible to determine isotopic compositions. Due to the sputtering process, depth profiles and 3-dimensional analysis can be performed. In the present contribution first results of NanoSIMS measurements of individual aerosol particles are shown.
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