Growth and formation mechanism of sea urchin-like ZnO nanostructures on Si

被引：24

作者：

Kim, SH ^{[1
]}

Umar, A ^{[1
]}

Hahn, YB ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Sch Chem Engn & Technol, Nanomat Proc Res Ctr, Chonju 561756, South Korea

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2005年 / 22卷 / 03期

关键词：

ZnO; nanowires; growth mechanism; structural and optical properties;

D O I：

10.1007/BF02719432

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 degrees C. ZnO nanowires having a diameter of 30-60 nm and length of 2-4 mu m 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 angstrom and c=5.21 angstrom. Room temperature photoluminescence (PL) measurements showed a weak near band-edge emission at 380 rim, but a strong green emission at 500-530 mu m. 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.

引用

页码：489 / 493

页数：5

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