Department of Chemical and Biomolecular Engineering, KAUST-NUS GCR Program, and Minerals, Metals, and Materials Technology Center, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
Langmuir. 2010 Apr 20;26(8):5963-70. doi: 10.1021/la904292t.
Highly ordered superlattices assembled from transition metal oxide/sulfide submicrometer particles are difficult to prepare due to lack of monodisperse primary building blocks. In this work, we have successfully synthesized monodisperse Cu(2)O spheres with diameters in the submicrometer regime of 130-135 nm. Using the as-prepared Cu(2)O spheres as solid precursor, uniform hollow CuS and CuSe derivatives have also been synthesized in solution media. More importantly, a range of two-dimensional and three-dimensional superlattices of Cu(2)O, CuS, and CuSe solid/hollow spheres have been assembled for the first time. Without assistance of conventional sacrificing solid templates, the degree of ordering achieved in these superlattices is comparable to those reported for well-studied silica and polystyrene beads. The realization of these self-assembled superlattices may provide a new way of thin film design and fabrication for this class of photosensitive semiconducting materials using their prefabricated building blocks.
由于缺乏单分散的基本构建块，由过渡金属氧化物/硫化物亚微米颗粒组装而成的高度有序的超晶格很难制备。在这项工作中，我们成功地合成了直径在亚微米范围内为 130-135nm 的单分散 Cu2O 球体。使用所制备的 Cu2O 球体作为固体前体，还在溶液介质中合成了均匀的空心 CuS 和 CuSe 衍生物。更重要的是，首次组装了一系列二维和三维的 Cu2O、CuS 和 CuSe 实心/空心球体超晶格。在没有常规牺牲型固体模板辅助的情况下，这些超晶格中达到的有序程度可与经过充分研究的二氧化硅和聚苯乙烯珠体相媲美。这些自组装超晶格的实现可能为使用这些预制构建块的光敏半导体材料的薄膜设计和制造提供一种新途径。
