Epitaxial electrodeposition of ZnO on Au(111) from alkaline solution: Exploiting amphoterism in Zn(II)

被引:74
作者
Limmer, Steven J.
Kulp, Elizabeth A.
Switzer, Jay A. [1 ]
机构
[1] Univ Missouri, Dept Chem, Rolla, MO 65409 USA
[2] Univ Missouri, Grad Ctr Mat Res, Rolla, MO 65409 USA
关键词
D O I
10.1021/la061185b
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The amphoteric nature of ZnO is used to produce the material from strongly alkaline solution. The solution pH is lowered globally to produce ZnO powder, and it is lowered locally at a Au(111) surface to produce epitaxial films. ZnO powder is precipitated from a solution of 10 mM Zn(II) in 0.25 M NaOH by simply adding 1 M HNO3 to the solution. For the film electrodeposition, the local pH at the electrode surface is decreased by electrochemically oxidizing the ascorbate dianion. The chemically precipitated ZnO powder grows with a sea urchin-like nanostructure, whereas the electrodeposited films have a columnar structure. ZnO electrodeposited onto a Au( 111) single crystal has a ZnO(0001)[10 (1) over bar1]//Au(111)[1 (1) over bar0] orientation relationship.
引用
收藏
页码:10535 / 10539
页数:5
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