Journal of Nanoparticle Research

, 11:1209

Synthesis of mixed metallic nanoparticles by spark discharge

  • N. S. Tabrizi
  • Q. Xu
  • N. M. van der Pers
  • U. Lafont
  • A. Schmidt-Ott
Technology and Applications

DOI: 10.1007/s11051-008-9568-8

Cite this article as:
Tabrizi, N.S., Xu, Q., van der Pers, N.M. et al. J Nanopart Res (2009) 11: 1209. doi:10.1007/s11051-008-9568-8

Abstract

Short spark discharges (2 μs) were successfully applied to generate mixed particles a few nanometres in diameter by fast quenching. Alloyed Cr–Co electrodes were applied to demonstrate this. Further it was shown that if the anode and the cathode are different materials, the discharge process mixes the vapour of both materials, forming mixed nanoparticles. Electron microscopy (TEM, SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analyses were performed on the collected particles to study their size, morphology, composition and structure. The average compositions of the particles were measured by inductively coupled plasma (ICP). In addition, online measurements of the particle size distribution by mobility analysis were carried out. In the case of alloyed electrodes (Cr–Co), the relative concentration of the elements in the nanoparticulate sample was consistent with the electrode composition. When using electrodes of different metals (Au–Pd and Ag–Pd) the individual nanoparticles showed a range of mixing ratios. No surface segregation was observed in these mixed noble metal particles. Crystalline nanoparticulate mixed phases were found in all cases.

Keywords

Spark dischargeBimetallic nanoparticlesMixed nanoparticlesMetallic nanoparticlesNanomanufacturing

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • N. S. Tabrizi
    • 1
  • Q. Xu
    • 2
  • N. M. van der Pers
    • 3
  • U. Lafont
    • 1
  • A. Schmidt-Ott
    • 1
  1. 1.Nanostructured Materials, Faculty of Applied SciencesDelft University of TechnologyDelftThe Netherlands
  2. 2.Laboratory for Material Science, National Centre for HREMDelft University of TechnologyDelftThe Netherlands
  3. 3.Department of Materials Science and Engineering, Faculty of 3mETUDelftDelftThe Netherlands