In this report, pristine TiO2 nanowire (NW) and gold (Au) nanoparticles (NP) decorated TiO2-NW are synthesized by glancing angle deposition (GLAD) technique on Si substrate. Transmission electron microscopy (TEM) exhibits the vertical growth of TiO2-NW. The average length and diameter of TiO2NWs are ~11O nm and ~15 nm, respectively and Au-NP has an average diameter of ~7 nm. Selected area electron diffraction (SAED) and x-ray diffraction (XRD) analyses confirm the polycrystalline nature of synthesized TiO2-NW and Au-NP. Photoluminescence (PL) emission is reduced for the sample Au-NP:TiO2-NW as compared to TiO2-NW. The enhanced Raman scattering and optical absorption are observed for the sample Au-NP:TiO2-NW compared to TiO2-NW. Improved performance in terms of current density, responsivity, detectivity, noise equivalent power (NEP), and photo-switching were obtained for device Au-NP:TiO2-NW as compared to TiO2-NW in both UV and visible region. The superior performances of the Au-NP:TiO2-NW device establishes it as a potential and promising candidate for photodetector application.

中文翻译：

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金属表面等离子体敏化 TiO2 纳米线的增强光学和电学性能


在本报告中，通过掠射角沉积（GLAD）技术在硅衬底上合成了原始TiO2纳米线（NW）和金（Au）纳米粒子（NP）装饰的TiO2-NW。透射电子显微镜 (TEM) 显示 TiO2-NW 的垂直生长。 TiO2NWs 的平均长度和直径分别为~11O nm 和~15 nm，Au-NP 的平均直径为~7 nm。选区电子衍射 (SAED) 和 X 射线衍射 (XRD) 分析证实了合成的 TiO2-NW 和 Au-NP 的多晶性质。与 TiO2-NW 相比，Au-NP:TiO2-NW 样品的光致发光 (PL) 发射减少。与 TiO2-NW 相比，Au-NP:TiO2-NW 样品的拉曼散射和光吸收增强。与 TiO2-NW 相比，Au-NP:TiO2-NW 器件在紫外和可见光区域的电流密度、响应度、探测率、噪声等效功率 (NEP) 和光开关方面均获得了改进的性能。 Au-NP:TiO2-NW 器件的卓越性能使其成为光电探测器应用的潜在且有前途的候选者。