In this work, vertically oriented well-aligned palladium-adsorbed ZnO (PZO) nanorod (NR) arrays were successfully prepared on indium-tin-oxide (ITO) glass substrates via an aqueous solution method with photochemical synthesis. The nanostructures of the PZO NRs were characterized via a field-emission scanning electron microscopy (FE-SEM), a high-resolution transmission electron microscopy (HR-TEM), and the X-ray diffraction (XRD), which revealed that the PZO NRs show a hexagonal wurtzite structure and grew preferentially along the (002) crystal plane. The composition of the adsorbed sample was also confirmed by an X-ray photoelectron spectroscopy and an energy-dispersive X-ray spectroscopy. The PZO NRs exhibited superior field-emission (FE) performance under UV irradiation than in the dark with a low turn-on field value of 5.62 V μm⁻¹ and an enhanced field enhancement factor (β) of 9145.07. It was found that the FE characteristics of the PZO NRs were improved by UV light irradiation, which attributed to generate a large number of electrons.

在这项工作中，通过水溶液法和光化学合成，在氧化铟锡 (ITO) 玻璃基板上成功制备了垂直取向的良好排列的钯吸附 ZnO (PZO) 纳米棒 (NR) 阵列。PZO NRs 的纳米结构通过场发射扫描电子显微镜 (FE-SEM)、高分辨率透射电子显微镜 (HR-TEM) 和 X 射线衍射 (XRD) 表征，结果表明 PZO NRs 显示六方纤锌矿结构并优先沿（002）晶面生长。吸附样品的组成也通过 X 射线光电子能谱和能量色散 X 射线光谱证实。PZO NRs 在紫外线照射下表现出比在黑暗中更优越的场发射 (FE) 性能，其低导通场值为 5.62 Vμ m ^-1和增强的场增强因子 ( β ) 为 9145.07。发现PZO NRs的FE特性通过UV光照射得到改善，这归因于产生大量电子。