Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Synthesis and Formation Mechanism of ZnO Nanotubes via an Electrochemical Method

전기화학적 방법에 의한 산화아연 나노튜브의 합성과 형성 기구

  • Moon, Jin Young (School of Materials Science and Engineering, Kyungpook National University) ;
  • Kim, Hyunghoon (School of Materials Science and Engineering, Kyungpook National University) ;
  • Lee, Ho Seong (School of Materials Science and Engineering, Kyungpook National University)
  • 문진영 (경북대학교 공과대학 신소재공학부) ;
  • 김형훈 (경북대학교 공과대학 신소재공학부) ;
  • 이호성 (경북대학교 공과대학 신소재공학부)
  • Received : 2010.12.24
  • Published : 2011.05.25
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Abstract

ZnO nanotube arrays were synthesized by a two-step process: electrodeposition and selective dissolution. In the first step, ZnO nanorod arrays were grown on an Au/Si substrate by using a homemade electrodeposition system. ZnO nanorod arrays were then selectively dissolved in an etching solution composed of 0.125 M NaOH, resulting in hollow ZnO nanotube arrays. It is suggested that the formation mechanism of the ZnO nanotube arrays might be attributed to the preferred surface adsorption of hydroxide ion ($OH^{-1}$) on a positive polar surface followed by selective dissolution of the metastable Zn-terminated ZnO (0001) polar surface caused by the difference in the surface energy per unit area between the ZnO nanorod and nanotube.

Keywords

Acknowledgement

Supported by : 한국연구재단

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