Synchronous Formation of ZnO/ZnS Core/Shell Nanotube Arrays with Removal of Template for Meliorating Photoelectronic Performance

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• 作者：Samar Tarish ; Zhijie Wang ; Ahmed Al-Haddad ; Chengliang Wang ; Adriana Ispas ; Henry Romanus ; Peter Schaaf ; Yong Lei
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：January 22, 2015
• 年：2015
• 卷：119
• 期：3
• 页码：1575-1582
• 全文大小：506K
• ISSN：1932-7455

文摘

We report herein an innovative approach to remove the anodic aluminum oxide (AAO) template completely without any further treatments, just through a subsequent sulfidation process to convert ZnO/AAO nanotubes to ZnO/ZnS core/shell nanotubes. The sulfidation treatment to attain well-ordered ZnO/ZnS core/shell arrays was conducted using a developed rapid thermal deposition methodology at low temperatures. During the sulfidation conversion process, the renowned Kirkendall effect was demonstrated to be responsible for the magic reactions. In addition, the sample maintained the well-ordered morphology without any deterioration after AAO template removal. The yielded nanostructures possessed a nice crystalline quality and superior optical and photoelectronic performances over the counterpart, ZnO/AAO. Thus, this technique broadens the possibility of fabricating well-ordered tubular core/shell structures with various compositions for multiple applications.