期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 27, 页码 22837-22845出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b05485
关键词
heteronanowires; dielectrophoresis assembly; single nanowire; parallel-aligned; UV photodetectors
资金
- Natural Science Foundation of China (NSFC) [91323303]
- NSFC [61604122, 51572216, 61307041]
- China Postdoctoral Science Foundation [2017M613139]
- technology research project in Shaanxi Province [2015GY005]
- 111 Program [B14040]
The branched hierarchical heteronanowires have been widely studied for optoelectronics application because of their unique electronic and photonic performances. Here, we successfully synthesized Ag nanowire-ZnO-branched nanorod heteronanowires based on an improved hydrothermal method. Then we fabricated single heteronanowire across a Au electrode pair with different gap widths and parallel-aligned heteronanowires on a Au interdigitated electrode with a dielectrophoresis method, indicating the flexibility and operability of the dielectrophoresis assembly method. Increased photocurrent and shortened response time could be obtained by air-annealing and Ar-plasma post-treatments. A large responsivity of 2.5 A W-1 and a linear dynamic range of 74 dB, could be obtained, indicating stable responsivity for both weak and strong illumination. The excellent photoresponse performance is attributed to the structure superiority of heteronanowires. The proposed strategy of dielectrophoresis-assembled heteronanowires provides a new opportunity to design and fabricate hierarchical nanostructure photodetectors.
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