Self-assembled periodical polycrystalline-ZnO/a-C nanolayers on Zn nanowire.
Zn nanowires with an epitaxial thin surface layer of zinc oxide were dispersed onto amorphous carbon films and stored at room temperature. After 1500 h, a self-organized equal-spaced zinc oxide (approximately 2 nm)/carbon (approximately 2.5 nm) multilayer structure was found to form outside the Zn nanowire, taking the place of the original ZnO surface layer. We carried a systematic study to clarify the self-formation mechanism of the periodical multilayers outside the Zn nanowire and found out that such a configuration originated from a chemical reaction between Zn and CO2 and were formed via a gas phase diffusion-interfacial chemical reaction-phase separation process.
Li
Quan
Q
Department of Physics, The Chinese University of Hong Kong, Shatin, New Territory, Hong Kong, China. liquan@phy.cuhk.edu.hk
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Ozkaya
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