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Engineered Pd-Ga alloy nanoparticles through spark ablation and in-flight metal-organic precursor decomposition

Bermeo, Marie LU ; Snellman, Markus LU ; Jönsson, Linnéa LU ; Krinke, Thomas LU ; Li, Zhongshan LU ; Deppert, Knut LU orcid and Messing, Maria E. LU (2026) In Journal of Aerosol Science 191.
Abstract

Pd-Ga alloy nanoparticles with tunable compositions were produced by combining spark ablation with a downstream injection of a metal-organic precursor. This dual-process approach enables control over nanoparticle composition and morphology by adjusting precursor flow rate and sintering temperature. At lower precursor flows, uniform Pd-Ga nanoparticles form, exhibiting stable Pd5Ga2 and Pd2Ga phases. HRTEM and STEM-EDX analyses reveal that as precursor supply increases, Ga incorporation intensifies, leading to structural transitions, phase segregation, and the formation of PdGa dominated phases with amorphous Ga-rich domains, influencing nanoparticle shape and crystallinity. This process unlocks pathways... (More)

Pd-Ga alloy nanoparticles with tunable compositions were produced by combining spark ablation with a downstream injection of a metal-organic precursor. This dual-process approach enables control over nanoparticle composition and morphology by adjusting precursor flow rate and sintering temperature. At lower precursor flows, uniform Pd-Ga nanoparticles form, exhibiting stable Pd5Ga2 and Pd2Ga phases. HRTEM and STEM-EDX analyses reveal that as precursor supply increases, Ga incorporation intensifies, leading to structural transitions, phase segregation, and the formation of PdGa dominated phases with amorphous Ga-rich domains, influencing nanoparticle shape and crystallinity. This process unlocks pathways for tailoring alloy compositions in-flight with low-melting point materials.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Metal-organic, Nanoparticles, Pd-Ga, Spark ablation, TMGa
in
Journal of Aerosol Science
volume
191
article number
106698
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:105016462089
ISSN
0021-8502
DOI
10.1016/j.jaerosci.2025.106698
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 The Authors
id
86457315-f65a-4969-a4ec-8384cd32cc36
date added to LUP
2025-09-29 07:21:48
date last changed
2025-10-14 13:16:25
@article{86457315-f65a-4969-a4ec-8384cd32cc36,
  abstract     = {{<p>Pd-Ga alloy nanoparticles with tunable compositions were produced by combining spark ablation with a downstream injection of a metal-organic precursor. This dual-process approach enables control over nanoparticle composition and morphology by adjusting precursor flow rate and sintering temperature. At lower precursor flows, uniform Pd-Ga nanoparticles form, exhibiting stable Pd<sub>5</sub>Ga<sub>2</sub> and Pd<sub>2</sub>Ga phases. HRTEM and STEM-EDX analyses reveal that as precursor supply increases, Ga incorporation intensifies, leading to structural transitions, phase segregation, and the formation of PdGa dominated phases with amorphous Ga-rich domains, influencing nanoparticle shape and crystallinity. This process unlocks pathways for tailoring alloy compositions in-flight with low-melting point materials.</p>}},
  author       = {{Bermeo, Marie and Snellman, Markus and Jönsson, Linnéa and Krinke, Thomas and Li, Zhongshan and Deppert, Knut and Messing, Maria E.}},
  issn         = {{0021-8502}},
  keywords     = {{Metal-organic; Nanoparticles; Pd-Ga; Spark ablation; TMGa}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Aerosol Science}},
  title        = {{Engineered Pd-Ga alloy nanoparticles through spark ablation and in-flight metal-organic precursor decomposition}},
  url          = {{http://dx.doi.org/10.1016/j.jaerosci.2025.106698}},
  doi          = {{10.1016/j.jaerosci.2025.106698}},
  volume       = {{191}},
  year         = {{2026}},
}