Zhuang Zhongbin, Peng Qing, Zhang Boce, Li Yadong
Department of Chemistry, Tsinghua University, Beijing, 100084 People's Republic of China.
J Am Chem Soc. 2008 Aug 13;130(32):10482-3. doi: 10.1021/ja803644g. Epub 2008 Jul 18.
Highly uniform Cu2S nanocrystals with controllable sizes and shapes (circular and elongated) have been synthesized through a novel water-oil interface confined reaction. They can self-assemble into highly ordered multilayer superlattices. By controlling the size and shape of building block nanocrystals, the packing symmetry of the superlattice can be engineered. For circular nanocrystals, both fcc and hcp multilayer superlattices are found in the sample. For elongated nanocrystals, they can also generate a close-packed layer and further stack into a multilayer superlattice. The dipole moment of the inner nanocrystals is useful for their stacking. This work provides a simple bottom-up approach to integrate nanocrystals, as well as to adjust the packing symmetry of the final superlattice, which may have potential applications for nanomaterials and nanodevices in the future.
通过一种新型的水-油界面受限反应，合成了尺寸和形状（圆形和细长形）可控的高度均匀的Cu2S纳米晶体。它们可以自组装成高度有序的多层超晶格。通过控制构建纳米晶体的尺寸和形状，可以设计超晶格的堆积对称性。对于圆形纳米晶体，在样品中发现了面心立方（fcc）和六方密堆积（hcp）多层超晶格。对于细长形纳米晶体，它们也可以形成密堆积层并进一步堆叠成多层超晶格。内部纳米晶体的偶极矩对其堆叠很有用。这项工作提供了一种简单的自下而上的方法来整合纳米晶体，以及调整最终超晶格的堆积对称性，这在未来可能对纳米材料和纳米器件有潜在应用。
