Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Self-assembly of ZnO Stripes Prepared by Anodization in an Ethanolic Sulfuric Acid

에탄올/황산 혼압액에서 양극산화법을 이용한 자기정렬된 ZnO 줄무늬 구조 제조 연구

  • Kim, Sung Joong (Nanomaterial Application Division, Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Choi, Jinsub (Nanomaterial Application Division, Korea Institute of Ceramic Engineering and Technology (KICET))
  • 김성중 (요업(세라믹)기술원, 청정 바이오소재팀) ;
  • 최진섭 (요업(세라믹)기술원, 청정 바이오소재팀)
  • Received : 2008.03.20
  • Accepted : 2008.05.06
  • Published : 2008.08.31
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Abstract

There are no many research reports on the preparation of ZnO by electrochemical oxidation since the zinc oxide is very easily dissolved in an acidic or basic environment, even though zinc oxides have attracted many attentions because of their optical/electrical properties. In this paper, we describe the fabrication of self-ordered stripes of ZnO by anodization of Zn in an ethanolic sulfuric acid. The formation of stripes of ZnO originating from Zn is attributed to water-selective dissolution of ZnO during anodization. We study in detail the effects of concentration of $H_2SO_4$, applied potential, anodization time, and addition of a small amount of water on the fabrication of stripes of ZnO. Mechanisms for the fabrication of ZnO stripes are discussed in terms of the above-mentioned effects.

산화아연은 광학적/전기적 특성 때문에 많이 연구되고 있는 재료이지만 산, 염기분위기에 약하기 때문에 양극 산화법을 이용하여 제조하기 힘들며, 현재 보고 되어 지고 있는 연구결과 역시도 많지 않다. 본 논문에서는 일반적인 전해질인 수용액이 아닌 에탄올과 $H_2SO_4$의 혼합용액을 사용하여 양극산화 하였으며 수용액에서 제조된 ZnO와는 다른 자기 정렬된 줄무늬의 육각판상구조를 가진 ZnO를 제조할 수 있었다. 이는 $H_2SO_4$를 함유한 에탄올용액에서 $H_2SO_4$에 미량 포함된 $H_2O$가 ZnO의 선택적인 용해를 함으로서 자기 정렬된 구조를 만드는데 기인한다. $H_2SO_4$의 농도, 인가전압, 양극산화 시간, 물 첨가 등에 따른 영향 및 자기 정렬된 줄무늬의 육각판상구조를 생성하는 메커니즘을 다루었다.

Keywords

References

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