Study of the spontaneous growth of ZnO thin films from aqueous solutions

被引：19

作者：

Chaparro, AM ^{[1
]}

Maffiotte, C ^{[1
]}

Gutiérrez, MT ^{[1
]}

Herrero, J ^{[1
]}

机构：

[1] CIEMAT, Dep Energias Renovables, E-28040 Madrid, Spain

来源：

THIN SOLID FILMS | 2003年 / 431卷

关键词：

zinc oxide; electroless; quartz-crystal microbalance; superoxide;

D O I：

10.1016/S0040-6090(03)00248-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spontaneous growth of ZnO thin films from Zn2+ aqueous solution is promoted by oxygen dissolved in the solution in the presence of a reducing agent. A study of this process with the quartz-crystal microbalance (QCM) is presented. It is observed that the growth of ZnO is due to the reduction of oxygen. Mechanistics aspects are discussed. An electroless-chemical process is proposed, consisting in the formation of the superoxide radical (O-2(-.)) followed by chemical reaction of two O-2(-.) with Zn(NH3)(4)(2+) cations. In this scheme, only one electron transfer per oxygen molecule is necessary. This is probably the reason of the easiness of the spontaneous growth of ZnO. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：373 / 377

页数：5

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