ElZein Basma, Elrashidi Ali, Dogheche Elhadj, Jabbour Ghassan
Department of Electrical Engineering, University of Business and Technology, Jeddah 21432, Saudi Arabia.
Department of Engineering Physics, Alexandria University, Alexandria 21544, Egypt.
Materials (Basel). 2022 Aug 3;15(15):5358. doi: 10.3390/ma15155358.
The bending effect of self-catalyst zinc oxide nanowires on a photoconducting behavior has been investigated by in-situ scanning electron microscope method and interpreted by analytical modeling. Zinc oxide NWs tend to incline due to geometric instability and because of the piezoelectric properties, which was confirmed by scanning electron microscope images. A cantilever bending model adequately describes the bending and bundling events, which are linked to the electrostatic interaction between nanowires. The light absorption of zinc oxide nanowires in the visible and near infrared bands has been modelled using the finite difference time domain method. The influence of the density of nanowires (25%, 50%, 75%) and the integration of plasmonic nanoparticles distributed on the seed layer (with varied radii) on the light absorption of zinc oxide nanowires was studied using simulation analysis. We have shown that the geometry of zinc oxide nanowires in terms of length, separation distance, and surface charge density affects the process of zinc oxide nanowires bending and bundling and that absorption will be maximized by integrating Au plasmonic nanoparticles with a radius of 10 nm.
通过原位扫描电子显微镜方法研究了自催化氧化锌纳米线对光电导行为的弯曲效应，并通过分析模型进行了解释。由于几何不稳定性以及压电特性，氧化锌纳米线趋于倾斜，扫描电子显微镜图像证实了这一点。悬臂弯曲模型能够充分描述与纳米线之间静电相互作用相关的弯曲和捆绑事件。使用时域有限差分法对氧化锌纳米线在可见光和近红外波段的光吸收进行了建模。通过模拟分析研究了纳米线密度（25%、50%、75%）以及分布在种子层上的等离子体纳米颗粒（半径各异）的整合对氧化锌纳米线光吸收的影响。我们已经表明，氧化锌纳米线在长度、间距和表面电荷密度方面的几何结构会影响氧化锌纳米线的弯曲和捆绑过程，并且通过整合半径为10 nm的金等离子体纳米颗粒，吸收将达到最大值。
