On-line compositional measurements of AuAg aerosol nanoparticles generated by spark ablation using optical emission spectroscopy
(2022) In Journal of Aerosol Science 165.- Abstract
Spark ablation is an established technique for generating aerosol nanoparticles. Recent demonstrations of compositional tuning of bimetallic aerosols have led to a demand for on-line stoichiometry measurements. In this work, we present a simple, non-intrusive method to determine the composition of a binary AuAg nanoparticle aerosol on-line using the optical emission from the electrical discharges. Machine learning models based on the least absolute shrinkage and selection operator (LASSO) were trained on optical spectra datasets collected during aerosol generation and labelled with X-ray fluorescence spectroscopy (XRF) compositional measurements. Models trained for varying discharge energies demonstrated good predictability of... (More)
Spark ablation is an established technique for generating aerosol nanoparticles. Recent demonstrations of compositional tuning of bimetallic aerosols have led to a demand for on-line stoichiometry measurements. In this work, we present a simple, non-intrusive method to determine the composition of a binary AuAg nanoparticle aerosol on-line using the optical emission from the electrical discharges. Machine learning models based on the least absolute shrinkage and selection operator (LASSO) were trained on optical spectra datasets collected during aerosol generation and labelled with X-ray fluorescence spectroscopy (XRF) compositional measurements. Models trained for varying discharge energies demonstrated good predictability of nanoparticle stoichiometry with mean absolute errors <10 at. %. While the models utilized the emission spectra at different wavelengths in the predictions, a combined model using spectra from all discharge energies made accurate predictions of the AuAg nanoparticle composition, showing the method's robustness under variable synthesis conditions.
(Less)
- author
- Snellman, Markus
LU
; Samuelsson, Per
LU
; Eriksson, Axel
LU
; Li, Zhongshan LU and Deppert, Knut LU
- organization
- publishing date
- 2022-09
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Bimetallic nanoparticles, Machine learning, Optical diagnostics, Plasma spectroscopy, Spark ablation
- in
- Journal of Aerosol Science
- volume
- 165
- article number
- 106041
- pages
- 11 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85133444603
- ISSN
- 0021-8502
- DOI
- 10.1016/j.jaerosci.2022.106041
- project
- Aerosol Synthesis and Characterization of Heterogeneous Bimetallic Nanoparticles
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2022 The Authors
- id
- bb328012-bda1-4600-8d8e-b1da9e509d93
- date added to LUP
- 2022-07-29 09:33:37
- date last changed
- 2024-02-18 02:03:25
@article{bb328012-bda1-4600-8d8e-b1da9e509d93, abstract = {{<p>Spark ablation is an established technique for generating aerosol nanoparticles. Recent demonstrations of compositional tuning of bimetallic aerosols have led to a demand for on-line stoichiometry measurements. In this work, we present a simple, non-intrusive method to determine the composition of a binary AuAg nanoparticle aerosol on-line using the optical emission from the electrical discharges. Machine learning models based on the least absolute shrinkage and selection operator (LASSO) were trained on optical spectra datasets collected during aerosol generation and labelled with X-ray fluorescence spectroscopy (XRF) compositional measurements. Models trained for varying discharge energies demonstrated good predictability of nanoparticle stoichiometry with mean absolute errors <10 at. %. While the models utilized the emission spectra at different wavelengths in the predictions, a combined model using spectra from all discharge energies made accurate predictions of the AuAg nanoparticle composition, showing the method's robustness under variable synthesis conditions.</p>}}, author = {{Snellman, Markus and Samuelsson, Per and Eriksson, Axel and Li, Zhongshan and Deppert, Knut}}, issn = {{0021-8502}}, keywords = {{Bimetallic nanoparticles; Machine learning; Optical diagnostics; Plasma spectroscopy; Spark ablation}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Journal of Aerosol Science}}, title = {{On-line compositional measurements of AuAg aerosol nanoparticles generated by spark ablation using optical emission spectroscopy}}, url = {{http://dx.doi.org/10.1016/j.jaerosci.2022.106041}}, doi = {{10.1016/j.jaerosci.2022.106041}}, volume = {{165}}, year = {{2022}}, }