Vertically aligned and highly dense Zinc oxide (ZnO) nanorods (NRs) have been successfully synthesized by a two-step hydrothermal method and decorated by silver (Ag) nanoparticles (NPs) via a dip coating technique. Absorption spectra indicate the presence of metal Ag NPs. The photoluminescence (PL) spectrum of as-grown ZnO nanorods shows ultra violet (UV) emission centered around 390 nm and a sharp defect-related emission peak around 580 nm. The presence of Ag NPs on the ZnO NRs shows a significant red shift in PL peak position in the visible region and a complete quenching of UV emission. The changes in UV–Vis and PL spectra of ZnO NRs decorated with Ag metal NPs are studied and discussed.

中文翻译：

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低温水热法合成Ag纳米粒子修饰的ZnO纳米棒

垂直排列的高密度氧化锌（ZnO）纳米棒（NRs）已通过两步水热法成功合成，并通过浸涂技术用银（Ag）纳米颗粒（NPs）装饰。吸收光谱表明存在金属Ag NP。生长中的ZnO纳米棒的光致发光（PL）光谱显示出以390 nm为中心的紫外线（UV）发射，以及以580 nm为中心的与缺陷相关的急剧发射峰。ZnO NRs上Ag NPs的存在表明可见光区的PL峰位置发生明显的红移，并完全淬灭了UV发射。研究和讨论了用Ag金属纳米粒子修饰的ZnO NRs的UV-Vis和PL光谱的变化。