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In-situ characterization of metal nanoparticles and their organic coatings using laser-vaporization aerosol mass spectrometry

Nilsson, Patrik LU ; Eriksson, Axel LU ; Ludvigsson, Linus LU ; Messing, Maria LU ; Nordin, Erik LU ; Gudmundsson, Anders LU ; Meuller, Bengt LU ; Deppert, Knut LU ; Fortner, Edward and Onasch, Timothy, et al. (2015) In Nano Reseach 8(12). p.3780-3795
Abstract
The development of methods to produce nanoparticles with unique properties

via the aerosol route is progressing rapidly. Typical characterization techniques extract particles from the synthesis process for subsequent offline analysis, which may alter the particle characteristics. In this work, we use laser-vaporization aerosol mass spectrometry (LV-AMS) with 70-eV electron ionization for real-time,

in-situ nanoparticle characterization. The particle characteristics are examined for various aerosol synthesis methods, degrees of sintering, and for controlled condensation of organic material to simulate surface coating/functionalization. The LV-AMS is used to characterize several types of metal nanoparticles (Ag, Au, Pd,... (More)
The development of methods to produce nanoparticles with unique properties

via the aerosol route is progressing rapidly. Typical characterization techniques extract particles from the synthesis process for subsequent offline analysis, which may alter the particle characteristics. In this work, we use laser-vaporization aerosol mass spectrometry (LV-AMS) with 70-eV electron ionization for real-time,

in-situ nanoparticle characterization. The particle characteristics are examined for various aerosol synthesis methods, degrees of sintering, and for controlled condensation of organic material to simulate surface coating/functionalization. The LV-AMS is used to characterize several types of metal nanoparticles (Ag, Au, Pd, PdAg, Fe, Ni, and Cu). The degree of oxidation of the Fe and Ni nanoparticles is found to increase with increased sintering temperature, while the surface

organic-impurity content of the metal particles decreases with increased sintering temperature. For aggregate metal particles, the organic-impurity content is found to be similar to that of a monolayer. By comparing different equivalent-diameter measurements, we demonstrate that the LV-AMS can be used in tandem with a differential mobility analyzer to determine the compactness of synthesized metal particles, both during sintering and during material addition for surface functionalization. Further, materials supplied to the particle production line downstream of the particle generators are found to reach the generators as contaminants. The capacity for such in-situ observations is important, as it facilitates rapid response to undesired behavior within the particle production process. This study demonstrates the utility of real-time, in-situ aerosol mass spectrometric measurements to characterize metal nanoparticles obtained directly from the synthesis process line, including their chemical composition, shape, and contamination, providing the potential for effective optimization of process operating parameters. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
metal, aerosol, organic surface coating, contamination, morphology, alloy, spark discharge
in
Nano Reseach
volume
8
issue
12
pages
3780 - 3795
publisher
Springer
external identifiers
  • wos:000367003400004
  • scopus:84946925982
ISSN
1998-0124
DOI
10.1007/s12274-015-0877-9
language
English
LU publication?
yes
id
e6a2412b-b100-4012-aa39-c40decea1432 (old id 8303186)
date added to LUP
2015-12-08 13:38:46
date last changed
2017-04-23 03:17:48
@article{e6a2412b-b100-4012-aa39-c40decea1432,
  abstract     = {The development of methods to produce nanoparticles with unique properties<br/><br>
via the aerosol route is progressing rapidly. Typical characterization techniques extract particles from the synthesis process for subsequent offline analysis, which may alter the particle characteristics. In this work, we use laser-vaporization aerosol mass spectrometry (LV-AMS) with 70-eV electron ionization for real-time,<br/><br>
in-situ nanoparticle characterization. The particle characteristics are examined for various aerosol synthesis methods, degrees of sintering, and for controlled condensation of organic material to simulate surface coating/functionalization. The LV-AMS is used to characterize several types of metal nanoparticles (Ag, Au, Pd, PdAg, Fe, Ni, and Cu). The degree of oxidation of the Fe and Ni nanoparticles is found to increase with increased sintering temperature, while the surface<br/><br>
organic-impurity content of the metal particles decreases with increased sintering temperature. For aggregate metal particles, the organic-impurity content is found to be similar to that of a monolayer. By comparing different equivalent-diameter measurements, we demonstrate that the LV-AMS can be used in tandem with a differential mobility analyzer to determine the compactness of synthesized metal particles, both during sintering and during material addition for surface functionalization. Further, materials supplied to the particle production line downstream of the particle generators are found to reach the generators as contaminants. The capacity for such in-situ observations is important, as it facilitates rapid response to undesired behavior within the particle production process. This study demonstrates the utility of real-time, in-situ aerosol mass spectrometric measurements to characterize metal nanoparticles obtained directly from the synthesis process line, including their chemical composition, shape, and contamination, providing the potential for effective optimization of process operating parameters.},
  author       = {Nilsson, Patrik and Eriksson, Axel and Ludvigsson, Linus and Messing, Maria and Nordin, Erik and Gudmundsson, Anders and Meuller, Bengt and Deppert, Knut and Fortner, Edward and Onasch, Timothy and Pagels, Joakim},
  issn         = {1998-0124},
  keyword      = {metal,aerosol,organic surface coating,contamination,morphology,alloy,spark discharge},
  language     = {eng},
  number       = {12},
  pages        = {3780--3795},
  publisher    = {Springer},
  series       = {Nano Reseach},
  title        = {In-situ characterization of metal nanoparticles and their organic coatings using laser-vaporization aerosol mass spectrometry},
  url          = {http://dx.doi.org/10.1007/s12274-015-0877-9},
  volume       = {8},
  year         = {2015},
}