Enhanced ethanol sensing properties of NiO@ZnO core-shell nanofibers with P-N heterojunction
- Resource Type
- Conference
- Authors
- Bai, Jinglong; Zhao, Changhui; Gong, Huimin; Wang, Fei
- Source
- 2017 IEEE SENSORS SENSORS, 2017 IEEE. :1-3 Oct, 2017
- Subject
- Components, Circuits, Devices and Systems
Computing and Processing
General Topics for Engineers
Robotics and Control Systems
Signal Processing and Analysis
Zinc oxide
II-VI semiconductor materials
Ethanol
Heterojunctions
Gas detectors
Resistance
NiO@ZnO core-shell nanofibers
electrospinning
atomic layer deposition
gas sensors
- Language
Herein we have fabricated NiO@ZnO core-shell nanofibers (CSNFs) via a facile two-step method. Nickel nitrate/polyacrylonitrile (Ni(NO3)2/PAN) composite nanofibers were synthesized firstly by electrospinning, and atomic layer deposition (ALD) technique was applied to control the deposition of ZnO shell layers. After annealing at 600 °C in air, well-defined NiO@ZnO CSNFs were obtained. Gas-sensing measurements showed that NiO@ZnO CSNFs exhibited highly sensitive and selective ethanol sensing properties at 275 °C compared to those of pure NiO and ZnO NFs, suggesting that the fabrication of P-N heterojunction is an effective approach to improve their gas-sensing performance.