Electrical sterilization of Escherichia coli by electrostatic atomization with a photo-chemical catalyst

Ji Tae Hong, Hyunwoong Seo, Ho Sung Kim, Dong Gil Lee, Jin Ju Jang, Guo Cheng Xu, Hee Je Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The inactivation of Escherichia coli (E. coli) was studied to find the optimal sterilization conditions using electrostatic atomization with a near ultraviolet light-emitting diode (near UV-LED) and TiO2 nanofiber films. Three types of near UV-LEDs of different wavelengths (365 nm, 375 nm, 385 nm) were used in this investigation. In order to enhance the LED performances, TiO2 nanofiber films were utilized for the production of a photo-chemical catalytic effect. In these studies, the flow rate condition of the E. coli mixture was varied from 2 ml/h to 10 ml/h for the purposes of measuring the capabilities of the proposed sterilization method. During these electrostatic atomization experiments, Each LED irradiated a TiO2 nanofiber film and atomized E. coli mixture. The results of these experiments were compared with electrostatic atomization performed without the use of photo-chemical catalyst effects. The experimental result shows that the optimal sterilization effect of E. coli is 375 nm wavelength with a TiO2 nanofiber employed during electrostatic atomization.

Original languageEnglish
Pages (from-to)328-332
Number of pages5
JournalJournal of Electrostatics
Issue number4
Publication statusPublished - Aug 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering


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