Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 672, Issue -, Pages 374-379Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.197
Keywords
Core-shell structure; CuO; ZnO; Gas sensor
Categories
Funding
- National University Research Fund [GK261001009]
- Changjiang Scholar and Innovative Research Team [IRT_14R33]
- Overseas Talent Recruitment Project
- Chinese National 1000-talent-plan program [B14041]
- National Natural Science Foundation [11204238]
- Foundation of Shaanxi Educational Committee [14JK1331]
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CuO@ZnO core-shell cubes with controlled shell thickness were synthesized using a facile and environment-benign two-step solution route. A bending behavior was observed when electrical testing was conducted on the CuO@ZnO core-shell heterostructure coating, demonstrating formation of heterojunction barrier. Moreover, the CuO@ZnO appears to be a superior material for p-type sensor applications, it offers 2.6 times higher response, faster recovery rate and better selectivity comparing to the pristine CuO sensor. The enhanced gas sensing performance can be attributed to the coating of ZnO shell and improvement of the effectively electrical contacts between heterojunction materials. (C) 2016 Elsevier B.V. All rights reserved.
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