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From micro-to nanosized particles:Selected characterization methods and measurable parameters

Particuology 2011年第3期9卷 193-203页

作者： Nayla Sabbagh-Kupelwieser Anne Maisser wladyslaw w.szymanski Faculty of Physics Aerosol Physics and Environmental Physics DivisionUniversity of Vienna

Airborne micro- and nanoparticles-aerosols - play an important role in many natural phenomena and in a variety of industrial processes, as well as the public health issue. They may be of natural or anthropogenic origin; their presence in an environment might be intentional or due to undesirable release. In any case, merely the particle detection and characterization, ideally in real-time, provide an insight into the potential burden allowing also controlling and abatement measures. Due to the broad size range it is not possible to characterize the entire particle spectrum with only one method. This contribution discusses selected optical techniques based on elastic light scattering, which are suitable for characterization of micrometer sized particles and particular electrical techniques allowing measurement of nanoparticles. It is shown that combination of instruments measuring different properties of the same nanoparticles offers derivative parameters contributing to more complete characterization of aerosols

关键词： Aerosol Nanoparticles Light scattering Electrical mobility Particle sizing PM-fractions

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Analysis and handling of bio-nanoparticles and environmental nanoparticles using electrostatic aerosol mobility

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Particuology 2013年第1期11卷 14-19页

作者： Peter Kallinger Victor U.weiss Angela Lehner Gunter Allmaier wladyslaw w.szymanski University of Vienna.Faculty of Physics Boltzmanngasse 5A-1090 ViennaAustria Vienna University of Technology Institute of Chemical Technologies and AnalyticsCetreidemarkt 9A-1060 ViennaAustria University of Vienna Faculty of PhysicsBoltzmanngasse 5A-1090 ViennaAustria

The successful application of differential mobility analysis for the characterization and manipulation of nanoparticles at atmospheric pressure has given rise to further development of this technique. The parallel differential mobility analyzer provides the possibility to simultaneously measure a size spec- trum of nanoparticles and select a particular set of nanoparticles with a defined size for collection （as well as enrichment） and further orthogonal analysis （as for example electron microscopy, atomic force microscopy or mass spectrometry）. Performing a high resolution measurement of electrical mobility diameters allows molecular weight determination of species with ultrahigh molecular masses in the mega Dalton range （e.g. protein complexes）. The precise size measurement of the human rhinovirus has confirmed the potential of this technique to analyze even intact infectious human-pathogenic viruses. Moreover, the real-time measurement of nanoparticle occurrence in an urban environment confirms the versatility of the method presented here and its applicability also in other areas of importance.

关键词： Nanoparticles Environmental burden Virus measurement PDMA GEMMA

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Deliberation between PM1 and PM2.5 as air quality indicators based on comprehensive characterization of urban aerosols in Bangkok, Thailand

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Particuology 2017年第6期15卷 1-9页

作者： Issariya Vejpongsa Sirikalaya Suvachittanont Natsucla Klinklan Thunyapat Thongyen Miklos Veres wladyslaw w. szymanski Department of Chemical Engineering Kasetsart University Bangkok Thailand Kasetsart University Bangkok Thailand wigner Centre for Physics of the Hungarian Academy of Sciences Budapest Hungary Faculty of Physics University of Vienna Vienna Austria

Urban ambient aerosols in the size range below 10 μm were measured and sampled for further evalua- tion （by Raman and Thermal-Optical analysis） of the collected material. The presented data shows that monitoring number and/or surface area concentrations besides the mass concentration provides valu- able information for a meaningful assessment of the actual ambient air quality. The aim of the study was to characterize the urban aerosols using various instruments, methods, and sampling conditions, and to determine whether a split of the PMzs size fraction at PM1 may deliver a more sensible indication of the actual air quality than the current standard of monitoring PMzs. we found substantial differences relating to this split. PM2.5 data frequently include particles from both mechanical and combustion processes, PM1 measurements can be used to better distinguish particles derived from these two sources. we measured number concentrations of PM1 with PM2.5-1 concurrently with particle mass concentration and found that the typical average particle diameter by mass in the urban aerosols investigated was in the range of 120 nm; this corresponded well with the particle number size distributions measured in real time. Raman spectral analysis and thermal-optical evaluation of the sampled material also suggested that it would be sensible to split the measurement of the PM2.5 fraction into PM1 and PM2.s-1 size fractions, especially for analysis of carbonaceous aerosol components using the DRI thermal/optical reflectance carbon analysis system

关键词： Urban aerosol PM-ffactions Carbonaceous particles Raman spectroscopy Thermal-optical analysis

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