Journal of Nanoparticle Research

, Volume 9, Issue 2, pp 203–213

A simple and versatile mini-arc plasma source for nanocrystal synthesis

  • Junhong Chen
  • Ganhua Lu
  • Liying Zhu
  • Richard C. Flagan
Article

DOI: 10.1007/s11051-006-9168-4

Cite this article as:
Chen, J., Lu, G., Zhu, L. et al. J Nanopart Res (2007) 9: 203. doi:10.1007/s11051-006-9168-4

Abstract

Nanocrystals in the lower-nanometer-size range are attracting growing interest due to their unique properties. A simple and versatile atmospheric direct current mini-arc plasma source has been developed to produce nanoparticles as small as a few nanometers. The nanoparticles are formed by direct vaporization of solid precursors followed by a rapid quenching. Both semiconductor tin oxide and metallic silver nanoparticles have been produced at rates of 1–10 mg/h using the mini-arc source. Transmission electron microscopy and X-ray diffraction analyses indicate that most nanoparticles as produced are nonagglomerated and crystalline. Size distributions of nanoparticles measured with an online scanning electrical mobility spectrometer are broader than the self-preserving distribution, suggesting that the nanoparticle growth is coagulation-dominated, and that the particles experience a range of residence times. The electrical charges carried by as-produced aerosol nanoparticles facilitate the manipulation of nanoparticles. The new mini-arc plasma source hence shows promise to accelerate the exploration of nanostructured materials.

Keywords

nanoparticlesnanocrystalsarc plasmasynthesisnonagglomeratednanoengineering

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Junhong Chen
    • 1
  • Ganhua Lu
    • 1
  • Liying Zhu
    • 1
  • Richard C. Flagan
    • 2
  1. 1.Department of Mechanical EngineeringUniversity of Wisconsin-MilwaukeeMilwaukeeUSA
  2. 2.Department of Chemical EngineeringCalifornia Institute of TechnologyPasadenaUSA