Nano Express

Nanoscale Research Letters

, Volume 4, Issue 10, pp 1135-1140

Open Access This content is freely available online to anyone, anywhere at any time.

Considerable Enhancement of Field Emission of SnO2 Nanowires by Post-Annealing Process in Oxygen at High Temperature

  • J. B. WangAffiliated withInstitute of Modern Physics, Xiangtan UniversityKey Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University Email author 
  • , K. LiAffiliated withInstitute of Modern Physics, Xiangtan UniversityKey Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University
  • , X. L. ZhongAffiliated withInstitute of Modern Physics, Xiangtan UniversityKey Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University
  • , Y. C. ZhouAffiliated withInstitute of Modern Physics, Xiangtan UniversityKey Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University
  • , X. S. FangAffiliated withNanoscale Materials Center, National Institute for Materials Science
  • , C. C. TangAffiliated withNanoscale Materials Center, National Institute for Materials Science
  • , Y. BandoAffiliated withNanoscale Materials Center, National Institute for Materials Science

Abstract

The field emission properties of SnO2 nanowires fabricated by chemical vapor deposition with metallic catalyst-assistance were investigated. For the as-fabricated SnO2 nanowires, the turn-on and threshold field were 4.03 and 5.4 V/μm, respectively. Considerable enhancement of field emission of SnO2 nanowires was obtained by a post-annealing process in oxygen at high temperature. When the SnO2 nanowires were post-annealed at 1,000 °C in oxygen, the turn-on and threshold field were decreased to 3.77 and 4.4 V/μm, respectively, and the current density was increased to 6.58 from 0.3 mA/cm2 at the same applied electric field of 5.0 V/μm.

Keywords

SnO2 nanowires Chemical vapor deposition Field emission Annealing