Formation of Two-Dimensional Ordered Cavities of Zinc Oxide and Their Confinement Effect on Electrochemical Reactions

详细信息    查看全文

• 作者：Qun Zhou ; Jinjin Zhao ; Weiwei Xu ; Hong Zhao ; Ying Wu ; Junwei Zheng
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：February 21, 2008
• 年：2008
• 卷：112
• 期：7
• 页码：2378 - 2381
• 全文大小：432K
• 年卷期：v.112,no.7(February 21, 2008)
• ISSN：1932-7455

文摘

Micrometer polystyrene particles were uniformly assembled into a two-dimensional structure on an indium-doped tin oxide (ITO) electrode. An array of zinc oxide (ZnO) microcavities was fabricated with the templateof the assembled polystyrene particles by electrodeposition. Due to the resistance gradient of the ZnO cavitystructure, the ZnO cavity exhibits a confinement effect on the electrochemical reactions, making the electrodefunction as an array of "soft" microelectrodes. The electrochemical reduction of silver cations leads to theformation of the silver nanoparticles localized at the bottom of the ZnO cavities.