In-situ aerosol nanoparticle characterization by small angle X-ray scattering at ultra-low volume fraction

Author(s)
P. S. Bauer, H. Amenitsch, B. Baumgartner, G. Köberl, C. Rentenberger, P. M. Winkler
Abstract

State-of-the-art aerosol nanoparticle techniques all have one feature in common: for analysis they remove the nanoparticles from their original environment. Therefore, physical and chemical properties of the particles might be changed or cannot be measured correctly. To overcome these shortcomings, we apply synchrotron based small angle X-ray scattering (SAXS) as an in-situ measurement technique. Contrasting other aerosol studies using SAXS, we focus on particle concentrations which allow direct comparison to common aerosol nanoparticle analyzers. To this end, we analyze aerosol nanoparticles at ambient pressure and concentrations of slightly above similar to 10(6) cm(-3). A differential mobility particle sizer (DMPS) is operated in parallel. We find that SAXS enables measurement of the primary particles and the aggregates, whereas the DMPS detects only aggregates. We conclude that in-situ nanoparticle characterization with ultra-low volume fractions of similar to 10(-10) is feasible with SAXS. Our technique opens up a doorway to the in-situ analysis of aerosol nanoparticles under atmospheric conditions.

Organisation(s)
Aerosol Physics and Environmental Physics, Physics of Nanostructured Materials
External organisation(s)
Technische Universität Graz
Journal
Nature Communications
Volume
10
No. of pages
7
ISSN
2041-1723
DOI
https://doi.org/10.1038/s41467-019-09066-4
Publication date
03-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
Aerosol physics, Inorganic chemistry
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/insitu-aerosol-nanoparticle-characterization-by-small-angle-xray-scattering-at-ultralow-volume-fraction(112faa87-4d46-4a04-a369-f8db820b19c5).html