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

The Korea Association of Crystal Growth (한국결정성장학회)
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Synthesis of free-standing ZnO/Zn core-shell micro-polyhedrons using thermal chemical vapor deposition

열화학기상증착법을 이용한 프리스탠딩 ZnO/Zn 코어셀 마이크로 다면체 구조물의 합성

  • Choi, Min-Yeol (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Park, Hyun-Kyu (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Jeong, Soon-Wook (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Kim, Sang-Woo (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
  • 최민열 (금오공과대학교 신소재시스템공학부) ;
  • 박현규 (금오공과대학교 신소재시스템공학부) ;
  • 정순욱 (금오공과대학교 신소재시스템공학부) ;
  • 김상우 (금오공과대학교 신소재시스템공학부)
  • Published : 2008.08.31
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Abstract

In this work, we report synthesis of free-standing ZnO/Zn core-shell micro-polyhedrons using metal Zn pellets as a source material by the thermal chemical vapor deposition process. Scanning and transmission electron microscopy measurements were introduced to investigate morphologies and structural properties of as-grown ZnO/Zn core-shell micro-polyhedrons. It was found that micro-polyhedrons were composed of inner single-crystalline metal Zn surrounded by single-crystalline ZnO nanorod arrays. The inner single crystalline metal Zn with micro-scale diameter has a hexagonal crystal structure. Diameter and height of ZnO nanorods covering the metal Zn surface are below 10 nm and 100 nm, respectively. It was also confirmed that c-axis oriented ZnO nanorods are single crystalline with a hexagonal crystal structure.

본 연구에서는 금속 Zn 팰렛을 원료 물질로 이용하여 열화학기상증착법으로 마이크로 크기의 프리스탠딩 ZnO/Zn 코어셀 다면체 구조물을 합성하였다. 마이크로 크기로 성장된 ZnO/Zn 코어셀 다면체의 형태와 구조적인 특성을 분석하기 위해서 주사전자현미경과 투과전자현미경을 이용하였다. 성장된 마이크로 크기의 다면체는 단결정 ZnO 나노막대 배열에 의해 둘러싸인 단결정 금속 Zn로 구성되어 있음을 확인할 수 있었다. 마이크로 크기의 단결정 Zn는 육방정 결정구조로 이루어져 있으며, 표면을 구성하고 있는 c-축 배향된 ZnO 나노막대가 10 nm와 100 nm 이하의 직경과 높이를 각각 가지며 육방정 결정구조의 단결정임을 확인하였다.

Keywords

References

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