Abstract A comparative study of heterostructured CuO/CuWO 4 core/shell nanowires and double-layer thin films was performed through X-ray diffraction, confocal micro-Raman spectroscopy and electron (SEM and TEM) microscopies. The heterostructures were produced using a two-step process, starting from a deposition of amorphous WO 3 layer on top of CuO nanowires and thin films by reactive DC magnetron sputtering and followed by annealing at 650 °C in air. The second step induced a solid-state reaction between CuO and WO 3 oxides through a thermal diffusion process, revealed by SEM-EDX analysis. Morphology evolution of core/shell nanowires and double-layer thin films upon heating was studied by electron (SEM and TEM) microscopies. A formation of CuWO 4 phase was confirmed by X-ray diffraction and confocal micro-Raman spectroscopy.

中文翻译：

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异质结构CuO/CuWO 4 纳米线与薄膜的比较研究

摘要 通过 X 射线衍射、共焦显微拉曼光谱和电子（SEM 和 TEM）显微镜对异质结构的 CuO/CuWO 4 核/壳纳米线和双层薄膜进行了比较研究。异质结构使用两步法制备，首先通过反应性直流磁控溅射在 CuO 纳米线和薄膜顶部沉积非晶 WO 3 层，然后在 650 °C 的空气中退火。SEM-EDX 分析显示，第二步通过热扩散过程诱导了 CuO 和 WO 3 氧化物之间的固态反应。通过电子（SEM 和 TEM）显微镜研究了核/壳纳米线和双层薄膜在加热时的形态演变。通过X射线衍射和共焦微拉曼光谱证实了CuWO 4 相的形成。