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


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

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 ~106 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 ~10-10 is feasible with SAXS. Our technique opens up a doorway to the in-situ analysis of aerosol nanoparticles under atmospheric conditions. More... »

PAGES

1122

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41467-019-09066-4

DOI

http://dx.doi.org/10.1038/s41467-019-09066-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112641437

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30850597


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