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Open Access Nano Express

Synthesis and Sensing Properties of ZnO/ZnS Nanocages

Xue-Lian Yu12, Hui-Ming Ji1, Hong-Li Wang3, Jing Sun1 and Xi-Wen Du1*

Author Affiliations

1 School of Materials Science and Engineering, Tianjin University, 300072, Tianjin, People’s Republic of China

2 Motorola (China) Electronics Ltd, No. 10, 4th Avenue, TEDA, 300457, Tianjin, People’s Republic of China

3 School of Mechanical Engineering, Tianjin University, 300072, Tianjin, People’s Republic of China

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Nanoscale Research Letters 2010, 5:644-648  doi:10.1007/s11671-010-9528-y

Published: 16 January 2010

Abstract

Large-scale uniform ZnO dumbbells and ZnO/ZnS hollow nanocages were successfully synthesized via a facile hydrothermal route combined with subsequent etching treatment. The nanocages were formed through preferential dissolution of the twinned (0001) plane of ZnO dumbbells. Due to their special morphology, the hollow nanocages show better sensing properties to ethanol than ZnO dumbbells. The gain in sensitivity is attributed to both the interface between ZnO and ZnS heterostructure and their hollow architecture that promotes analyte diffusion and increases the available active surface area.

Keywords:
ZnO/ZnS; Hollow; Nanocages; Ethanol sensing; Interface