Solution-grown zinc oxide nanowires

被引:629
作者
Greene, Lori E.
Yuhas, Benjamin D.
Law, Matt
Zitoun, David
Yang, Peidong [1 ]
机构
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[2] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA
关键词
D O I
10.1021/ic0601900
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
We review two strategies for growing ZnO nanowires from zinc salts in aqueous and organic solvents. Wire arrays with diameters in the nanoscale regime can be grown in an aqueous solution of zinc nitrate and hexamethylenetetramine. With the addition of poly( ethylenimine), the lengths of the wires have been increased to 25 Am with aspect ratios over 125. Additionally, these arrays were made vertical by nucleating the wires from oriented ZnO nanocrystals. ZnO nanowire bundles have been produced by decomposing zinc acetate in trioctylamine. By the addition of a metal salt to the solution, the ZnO wires can be doped with a range of transition metals. Specifically, ZnO nanowires were homogeneously doped with cobalt and showed a marked deviation from paramagnetic behavior. We conclude by highlighting the use of these solution-grown nanowire arrays in dye-sensitized solar cells. The nanowire cells showed an improvement in the charge collection efficiency over traditional nanoparticle cells.
引用
收藏
页码:7535 / 7543
页数:9
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