Temperature dependence of Cu2O orientations in oxidation of Cu (111)/ZnO (0001) by oxygen plasma

doi:10.1088/1674-1056/21/7/076401

Abstract The role of temperature on the oxidation dynamics of Cu₂O on ZnO (0001) was investigated during the oxidation of Cu (111)/ZnO (0001) by using the oxygen plasma as oxidant. A transition from single crystalline Cu₂O (111) orientation to micro-zone phase separation with multiple orientations was revealed when the oxidation temperature increased from 300 ℃ to higher. The experimental results clearly showed the effect of oxidation temperature with the assistance of oxygen plasma on changing the morphology of Cu (111) film and enhancing the lateral nucleation and migration abilities of cuprous oxides. A vertical top-down oxidation mode and a lateral migration model were proposed to explain the different nucleation and growth dynamics of the temperature-dependent oxidation process in the oxidation of Cu (111)/ZnO (0001).

Keywords: Cu₂O oxidation plasma molecular beam epitaxy

Received: 14 February 2012
Revised: 09 March 2012
Accepted manuscript online:

PACS:	64.75.Lm	(Phase separation and segregation in oxidation)
	68.55.-a	(Thin film structure and morphology)
	81.15.Hi	(Molecular, atomic, ion, and chemical beam epitaxy)

Fund: Project supported by the Ministry of Science and Technology of China (Grant Nos. 2011CB302002, 2009CB929400 and 2009AA033101), the National Natural Science Foundation of China (Grant Nos. 11174348 and 61076007), the Chinese Academy of Sciences, and the National Synchrotron Radiation Laboratory in the University of Science and Technology of China.

Corresponding Authors: Mei Zeng-Xia, Du Xiao-Long
E-mail: zxmei@aphy.iphy.ac.cn;xldu@aphy.iphy.ac.cn

Cite this article:

Li Jun-Qiang(李俊强), Mei Zeng-Xia(梅增霞), Ye Da-Qian(叶大千), Hou Yao-Nan(侯尧楠), Liu Yao-Ping(刘尧平), A. Yu. Kuznetsov, and Du Xiao-Long(杜小龙) Temperature dependence of Cu₂O orientations in oxidation of Cu (111)/ZnO (0001) by oxygen plasma 2012 Chin. Phys. B 21 076401

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Temperature dependence of Cu2O orientations in oxidation of Cu (111)/ZnO (0001) by oxygen plasma

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Temperature dependence of Cu₂O orientations in oxidation of Cu (111)/ZnO (0001) by oxygen plasma