Unexpected Long-Term Instability of ZnO Nanowires “Protected” by a TiO2 Shell

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• 作者：Yang Yang ; Dong Sik Kim ; Yong Qin ; Andreas Berger ; Roland Scholz ; Hyunbin Kim ; Mato Knez ; Ulrich Gsele
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：October 7, 2009
• 年：2009
• 卷：131
• 期：39
• 页码：13920-13921
• 全文大小：144K
• 年卷期：v.131,no.39(October 7, 2009)
• ISSN：1520-5126

文摘

We revealed the aggravated instability of (0001)-oriented ZnO nanowires when they were deposited by a TiO₂ shell even under ambient conditions. Trace UV photons from daylight and moisture from air, which generally have negligible effects on “bare” ZnO nanowires, can obviously enhance their photocorrosion due to the high bandgap of TiO₂ as well as this conformal core−shell heterostructure.