Sterilization of Escherichia coli by using near-UV LED and TiO2 nanofibers that were prepared by using electrostatic spray

Dong Gil Lee, Ji Tae Hong, Minkyu Son, Kyoung Jun Lee, Guo Cheng Xu, Kandasamy Prabakar, Hee Je Kim

Research output: Contribution to journalConference article

Abstract

TiO2 nanofiber films were prepared by a homemade electrostatic spray method at 13 kV using a high power supply. As-prepared TiO2 was used to sterilize enteropathogenic Escherichia coli in polluted water by using near-UV LEDs at three different wavelengths with variable exposure time and frequency of irradiation. Irrespective of the wavelength of the light source used, longer irradiation times such as 1 h completely inactivated the E. coli. However, a wavelength of 375 nm was effective in inactivating in a shorter irradiation time (15 min). When the frequency of irradiation was 1 kHz, almost 95% of the E. coli was inactivated after 30 min exposure.

Original languageEnglish
Article number014011
JournalPhysica Scripta T
VolumeT139
DOIs
Publication statusPublished - Jul 23 2010
Externally publishedYes
Event3rd International Symposium on Functional Materials 2009, ISFM 2009 - Jinju, Korea, Republic of
Duration: Jun 15 2009Jun 18 2009

Fingerprint

Nanofibers
TiO2
Spray
Escherichia
Irradiation
Electrostatics
Escherichia Coli
sprayers
light emitting diodes
electrostatics
irradiation
Wavelength
wavelengths
power supplies
High Power
light sources
Water
water

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)

Cite this

Sterilization of Escherichia coli by using near-UV LED and TiO2 nanofibers that were prepared by using electrostatic spray. / Lee, Dong Gil; Hong, Ji Tae; Son, Minkyu; Lee, Kyoung Jun; Xu, Guo Cheng; Prabakar, Kandasamy; Kim, Hee Je.

In: Physica Scripta T, Vol. T139, 014011, 23.07.2010.

Research output: Contribution to journalConference article

Lee, Dong Gil ; Hong, Ji Tae ; Son, Minkyu ; Lee, Kyoung Jun ; Xu, Guo Cheng ; Prabakar, Kandasamy ; Kim, Hee Je. / Sterilization of Escherichia coli by using near-UV LED and TiO2 nanofibers that were prepared by using electrostatic spray. In: Physica Scripta T. 2010 ; Vol. T139.
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AU - Lee, Dong Gil

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AU - Son, Minkyu

AU - Lee, Kyoung Jun

AU - Xu, Guo Cheng

AU - Prabakar, Kandasamy

AU - Kim, Hee Je

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AB - TiO2 nanofiber films were prepared by a homemade electrostatic spray method at 13 kV using a high power supply. As-prepared TiO2 was used to sterilize enteropathogenic Escherichia coli in polluted water by using near-UV LEDs at three different wavelengths with variable exposure time and frequency of irradiation. Irrespective of the wavelength of the light source used, longer irradiation times such as 1 h completely inactivated the E. coli. However, a wavelength of 375 nm was effective in inactivating in a shorter irradiation time (15 min). When the frequency of irradiation was 1 kHz, almost 95% of the E. coli was inactivated after 30 min exposure.

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