Control of nanoparticle size and agglomeration through electric-field- enhanced flame synthesis

Hong Zhao, Xiaofei Liu, Stephen D. Tse

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


The isolated study of electrophoretic transport of nanoparticles (that are innately charged through thermionic emission), with no ionic wind, has been conducted under uniform electric fields. Titania nanoparticles are produced using a burner-supported low-pressure premixed flame in a stagnation-point geometry from corresponding organometallic vapor precursor. The material processing flow field is probed in-situ using laser-induced fluorescence (LIF) to map OH-radical concentrations and gas-phase temperatures. The experimental results of particle growth under different applied electric fields are compared with computations using monodisperse and sectional models. The results show that such electric field application can decrease aggregate particle size (e.g. from 40 to 18 nm), maintain metastable phases and particle crystallinity, and non-monotonically affect primary particle size (e.g. from 6 to 5 nm) and powder surface area. A specific surface area (SSA) for anatase titania nanopowder of 310 m2/g, when synthesized under an applied electric field of 125 V/cm, is reported. Results are also given for the synthesis of alumina nanoparticles.

Original languageEnglish (US)
Pages (from-to)907-923
Number of pages17
JournalJournal of Nanoparticle Research
Issue number6
StatePublished - Aug 2008

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics


  • Electrical field
  • LIF
  • Nanoparticles
  • Processing
  • Residence time
  • Synthesis


Dive into the research topics of 'Control of nanoparticle size and agglomeration through electric-field- enhanced flame synthesis'. Together they form a unique fingerprint.

Cite this