A mobile system for a comprehensive online-characterization of nanoparticle aggregates based on wide-angle light scattering and laser-induced incandescence

Journal article


Publication Details

Author(s): Huber F, Altenhoff M, Will S
Journal: Review of Scientific Instruments
Publisher: AMER INST PHYSICS
Publication year: 2016
Volume: 87
Journal issue: 5
ISSN: 0034-6748
eISSN: 1089-7623


Abstract


A mobile demonstrator for the comprehensive online-characterization of gas-borne nanoparticle aggregates is presented. Two optical measurement techniques are combined, both utilizing a pulsed Nd:YAG laser as light source. Aggregate size and fractal dimension are measured by Wide-Angle Light Scattering (WALS). An ellipsoidal mirror images elastically scattered light from scattering angles between 10. and 165. onto a CCD-camera chip resulting in an almost complete scattering diagram with high angular resolution. Primary particle size and volume fraction are measured by time-resolved Laser-Induced Incandescence (TiRe-LII). Here, particles are heated up to about 3000 K by the short laser pulse, the enhanced thermal radiation signal is detected with gated photomultiplier tubes. Analysis of the signal decay time and maximum LII-signal allows for the determination of primary particle diameter and volume fraction. The performance of the system is demonstrated by combined measurements on soot nanoparticle aggregates from a soot aerosol generator. Particle and aggregate sizes are varied by using different equivalence ratios of the combustion in the generator. Soot volume fraction can be adjusted by different levels of dilution with air. Online-measurements were carried out demonstrating the favorable performance of the system and the potential for industrial applications such as process control and product development. The particle properties obtained are confirmed through transmission electron microscopy analysis on representative samples. Published by AIP Publishing.



FAU Authors / FAU Editors

Altenhoff, Michael
Lehrstuhl für Technische Thermodynamik
Huber, Franz Dr.-Ing.
Lehrstuhl für Technische Thermodynamik
Will, Stefan Prof. Dr.-Ing.
Lehrstuhl für Technische Thermodynamik


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


Research Fields

A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Huber, F., Altenhoff, M., & Will, S. (2016). A mobile system for a comprehensive online-characterization of nanoparticle aggregates based on wide-angle light scattering and laser-induced incandescence. Review of Scientific Instruments, 87(5). https://dx.doi.org/10.1063/1.4948288

MLA:
Huber, Franz, Michael Altenhoff, and Stefan Will. "A mobile system for a comprehensive online-characterization of nanoparticle aggregates based on wide-angle light scattering and laser-induced incandescence." Review of Scientific Instruments 87.5 (2016).

BibTeX: 

Last updated on 2019-17-01 at 09:32