中国物理B ›› 2022, Vol. 31 ›› Issue (3): 36101-036101.doi: 10.1088/1674-1056/ac20c8
Ning Li(李宁)1,2,†, Xin Li(李鑫)1,2,†, Ming-Yue Zhang(张明越)1,2, Jing-Ying Miao(苗景迎)1,2, Shen-Cheng Fu(付申成)1,2,‡, and Xin-Tong Zhang(张昕彤)1,2
Ning Li(李宁)1,2,†, Xin Li(李鑫)1,2,†, Ming-Yue Zhang(张明越)1,2, Jing-Ying Miao(苗景迎)1,2, Shen-Cheng Fu(付申成)1,2,‡, and Xin-Tong Zhang(张昕彤)1,2
摘要: Noble-metal/metal-oxide-semiconductor nanostructures as an important material platform have been applied in massive data storage. ZnO exhibits excellent optical modulation ability. However, plasmon induced charge separation effect in Ag/ZnO systems is very weak due to the low chemical activity on surface of the oxide. Herein, we prepare ZnO nanowire arrays via the hydrothermal method, and measure their absorption spectra, photoluminescence spectra and electron paramagnetic resonance, proving the existence of oxygen defects in ZnO. Accordingly, an idea of "electron reverse transfer" is proposed such that blue-ray (403.4 nm) induces reduction of Ag+ ions through the excitation of ZnO. Rod-like and spherical silver nanoparticles emerge on the surface and in the gap of ZnO nanowire arrays, respectively, after the visible light stimulus. It is found that nanowire density, oxygen defects and surface roughness are dependent on hydrothermal time. The optimized diffraction efficiency of 0.08% is obtained for reconstructing hologram in the nanocomposite film. This work provides a bright way for construction of ZnO-based optoelectronic integrated devices.
中图分类号: (Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires))