Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Fabrication and characteristics of ZnO nanorods grown on Zn substrates by the hydrothermal method

수열합성법에 의해 Zn 기판 위에 제조된 ZnO 나노로드의 특성

  • Sung, Ji-Hye (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Materials Center) ;
  • Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Materials Center) ;
  • Hwang, Jong-Hee (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Materials Center) ;
  • Lim, Tae-Young (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Materials Center) ;
  • Yeon, Deuk-Ho (Korea Institute of Ceramic Engineering and Technology, Electronic & Optic Materials Center) ;
  • Cho, Yong-Soo (Department of Materials Science and Engineering, Yonsei University)
  • 성지혜 (한국세라믹기술원 전자.광소재 센터) ;
  • 김진호 (한국세라믹기술원 전자.광소재 센터) ;
  • 황종희 (한국세라믹기술원 전자.광소재 센터) ;
  • 임태영 (한국세라믹기술원 전자.광소재 센터) ;
  • 연득호 (한국세라믹기술원 전자.광소재 센터) ;
  • 조용수 (연세대학교 신소재공학과)
  • Received : 2011.07.05
  • Accepted : 2011.08.05
  • Published : 2011.08.31
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Abstract

ZnO nanorods fabricated on a Zn substrate pre-coated with ZnO as a seed layer by the hydrothermal method were studied mainly as a function of ZnO precursor concentration. Characteristic features by using field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were investigated to define the changed micro-structure and crystalline phase of the ZnO nanorods according to the experimental conditions. The nanorod morphology strongly depended on the precursor concentration. For example, ZnO nanorods vertically aligned with a hexagonal (002) oriented structure with a diameter of 600~700 nm and length of $6.75{\mu}m$ were clearly observed at the highest concentration of 0.015 M. The strong hexagonal structure was believed to be associated with the highest photoluminescene (PL) intensity and a promising voltage value of ca. 6.069 V at $1000{\mu}A$.

수열합성법에 의해 ZnO 씨앗층이 코팅된 Zn 기판 위에 제조된 ZnO 나노로드는 주로 ZnO 전구체 농도에 따라 연구되었다. 주사전자현미경과 X선 회절분석기를 사용하여 얻은 그림은 실험 조건에 따라 변화되는 ZnO 나노로드의 미세구조와 결정상을 밝혀내기 위해 측정되었다. 나노로드의 형태는 전구체 농도에 강하게 결정된다. 예를 들어, 600~700 nm의 직경과 $6.75{\mu}m$의 길이를 갖는 육방정계 구조의 수직 성장된 ZnO 나노로드는 0.015 M의 가장 높은 농도에서 명확하게 관찰되었다. 강한 육방정계 구조는 가장 높은 PL 강도와 $1000{\mu}A$에서 약 6.069 V의 우수한 전압 값과 관련이 있다고 생각된다.

Keywords

References

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