Zhang Hua, Zhang Dongfeng, Guo Lin, Zhang Rui, Yin Penggang, Wang Rongming
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China.
J Nanosci Nanotechnol. 2008 Dec;8(12):6332-7.
Novel Cu2O chain-like network was assembled via a facile one-pot solution process with the assistance of poly(vinylpyrrolidone) (PVP). TEM observations showed that the chain-like structures were aggregated by hollow spheres approximately 70 nm in diameter. To be worth mentioning, HRTEM image recorded from the coherent interfacial region demonstrated that the lattice fringes penetrate from one sphere into the adjacent one smoothly without apparent diffraction contrast, which indicated that the hollow spheres experienced lattice fusion and grew into each other. Based on the systematic studies, an oriented aggregation mechanism was proposed, i.e., Cu2O nanoparticles into hollow spheres and subsequently the hollow spheres into the chain-like structures. The Raman spectra of the Cu2O chain-like hollow nanostructures were also investigated. It was found that the Raman peak intensity is different from that in the previous reports, which might be originated from the structure defect resulted from the oriented attachment.
通过简便的一锅溶液法，在聚乙烯吡咯烷酮（PVP）的辅助下组装了新型Cu2O链状网络。透射电子显微镜（TEM）观察表明，链状结构由直径约70 nm的空心球聚集而成。值得一提的是，从相干界面区域记录的高分辨率透射电子显微镜（HRTEM）图像表明，晶格条纹从一个球体平滑地穿透到相邻球体中，没有明显的衍射对比度，这表明空心球经历了晶格融合并相互生长。基于系统研究，提出了一种定向聚集机制，即Cu2O纳米颗粒聚集成空心球，随后空心球聚集成链状结构。还研究了Cu2O链状空心纳米结构的拉曼光谱。发现拉曼峰强度与先前报道的不同，这可能源于定向附着导致的结构缺陷。
