Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Effect of Oxygen Pressure on the Morphology of ZnO Nanostructures Fabricated by Thermal Evaporation Technique

열 증발법에 의하여 제작된 ZnO 나노 구조의 형상에 미치는 산소 압력의 영향

  • Lee, Jung-Hun (Department of Materials & Components Engineering, Dongeui University) ;
  • Lee, Geun-Hyoung (Department of Materials & Components Engineering, Dongeui University)
  • 이정헌 (동의대학교 융합부품공학과) ;
  • 이근형 (동의대학교 융합부품공학과)
  • Received : 2012.07.19
  • Accepted : 2012.10.19
  • Published : 2012.11.01
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Abstract

The effect of oxygen pressure in the synthesis of ZnO nanostructures through thermal evaporation of Zn powder was investigated. The thermal evaporation process was carried out in oxygen ambient for 1 hr at $1,000^{\circ}C$ under different pressures. The oxygen pressure was changed in range of 0.5 ~ 900 Torr. Any nanostructure was not formed on the specimens prepared at oxygen pressures lower than 10 Torr. When oxygen pressure was 100 Torr, ZnO nanowires were observed. With increasing the oxygen pressure to 500 Torr, the morphology of ZnO nanostructures changed from wire to tetrapod. For all the samples, room temperature photoluminescence spectra show a strong green emission peak at around 550 nm.

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References

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