Single-shot two-dimensional multi-angle light scattering (2D-MALS) technique for nanoparticle aggregate sizing

The two-dimensional multi-angle light scattering (2D-MALS) technique has been extended for single-shot size measurements of soot aggregates in flames. Six cameras are used for instantaneous acquisition of the elastic scattering from the aggregates at different directions between 10 to 90 ∘ of a lase...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2021-04, Vol.127 (4), Article 51
Main Authors: Martins, Fabio J. W. A., Kronenburg, Andreas, Beyrau, Frank
Format: Article
Language:English
Subjects:
Aggregates
Applied physics
Diffusion flames
Dilution
Elastic scattering
Engineering
Lasers
Light scattering
Light sheets
Nanoparticles
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Sizing
Soot
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Summary:The two-dimensional multi-angle light scattering (2D-MALS) technique has been extended for single-shot size measurements of soot aggregates in flames. Six cameras are used for instantaneous acquisition of the elastic scattering from the aggregates at different directions between 10 to 90 ∘ of a laser light sheet. Two diluted ethylene (50 and 60% by volume of C 2 H 4 fuel diluted with inert N 2 ) coflow laminar diffusion flames with little flickering are used as proof of concept. Results of instantaneous, average and fluctuating 2D fields of the effective radii of gyration, which are expected to characterize the size of the aggregates, compare well with the literature, demonstrating the applicability of the proposed sizing method to weakly unsteady combustion processes.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-021-07599-5