소개글
[화학공학]계층 구조를 가지고 있는 ZnO 나노구조의 합성과 특징(영문)에 대한 자료입니다.
목차
- Introduction
- Experimental detalis
- Results and discussion
- Conclusions
- Reference
본문내용
∙ ZnO is an good candidate for fabrication of optoelectronic
and electronic device.
∙ 1D ZnO nanostructures have many properties.
∙ It is that a simple two-step thermal evaporation process
to synthesize the hierarchical pure ZnO nanostructures of 6-fold structural symmetry without any metal catalyst.
∙ Pure zinc powder(99.99%) of 0.6g
∙ An alumina boat
∙ A horizontal quartz tube
∙ N-type Si wafer(cleaned by sonication in ethanol & acetone)
∙ Two type of carrier gases(pure argon & oxygen)
∙ Furnace
∙ Microscope
∙ The duration at 500 ℃ of Zn source : 60min
∙ The distance between Zn source and substrate : 34cm
∙ The work pressure : 180Pa
∙ The measured substrate temperature : about 200℃
∙ A flow rate : 300(Ar) & 80(O₂) sccm