화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.22, No.3, 489-493, May, 2005
DOI10.1007/BF02719432  Export Citation
Growth and Formation Mechanism of Sea Urchin-Like ZnO Nanostructures on Si
Sang-Hoon Kim, Ahmad Umar, and Yoon-Bong Hahn†
  • School of Chemical Engineering and Technology, Nanomaterials Processing Research Center, Chonbuk National University, Chonju 561-756, South Korea
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Sea urchin-like nanostructures of ZnO consisting of ZnO nanowires with blunt faceted ends were grown on Si (100) substrates by oxidation of metallic Zn at 600 ℃. ZnO nanowires having a diameter of 30-60 nm and length of 2-4 μm were in similar shape with uniform diameter along its entire length with well faceted blunt ends. X-ray diffraction and transmission electron microscope analysis showed that the as-grown nanostructures were highly crystalline with wurtzite hexagonal structure having lattice constants of a=b=3.25 A and c=5.21 A. Room temperature photoluminescence (PL) measurements showed a weak near band-edge emission at 380 nm, but a strong green emission at 500-530 nm. A model for vapor-solid (VS) growth mechanism of ZnO nanowires was presented, in which nucleation of ZnO is crucial for the growth of the nanostructures.
Keywords:ZnO;Nanowires;Growth Mechanism;Structural and Optical Properties
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