The preparation of spiral ZnO nanostructures by top-down wet-chemical etching and their related properties

被引：29
作者：
Han, Xiguang [1 ,2 ,3 ]
Zhou, Xi [1 ,2 ]
Jiang, Yaqi [1 ,2 ]
Xie, Zhaoxiong [1 ,2 ]
机构：
[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China
[3] Xuzhou Normal Univ, Jiangsu Key Lab Green Synthet Chem Funct Mat, Dept Chem, Sch Chem & Chem Engn, Xuzhou 221116, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 21期
基金：
中国国家自然科学基金;
关键词：
DISLOCATION-DRIVEN GROWTH; HIGH-INDEX FACETS; SCREW-DISLOCATION; NANOWIRES; NANOPARTICLES; NANOCRYSTALS; NANORODS; SURFACE; ARRAY; SHAPE;
D O I：
10.1039/c2jm30843f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, we report the synthesis of spiral ZnO nanocrystals by the wet-chemical etching of pyramid ZnO nanoparticles in a solvent mixture of oleic acid (OA) and 1-octylamine. Adequate evidence demonstrates that the OA in the mixed solvent acts as the etching agent. The formation of spiral ZnO nanoparticles is due to dislocations in the spiral shape surrounding the c axis formed during the growth of the pyramid ZnO nanoparticles. Moreover, the spiral ZnO nanoparticles exhibit much better gas sensing activity than the pyramid ZnO nanoparticles. Based on the structural analysis, we discuss the relationship between the surface structures and gas sensing properties.
引用
收藏
页码：10924 / 10928
页数：5
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