Zhao Shuo, Wu Yuying, Zhou Bo, Liu Xiangfa
Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China.
Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing, 100124, China.
Sci Rep. 2019 Nov 22;9(1):17337. doi: 10.1038/s41598-019-53851-6.
Boron has a tendency to form bulk structures due to its unique electron-deficient property, so it's hard for boron to form sheets in large quantities. Here, we report a novel method for the preparation of boron nanosheets in large quantities by copper medium. The method mainly includes mechanical exfoliation, recombination and extraction. A large number of boron nanosheets with a height of below 6 nm have been prepared in this work. X-ray photoelectron spectroscopy and Raman spectroscopy results confirmed that the nanosheets possess the characteristics of α-rhombohedra boron and β-rhombohedra boron with a high content of boron. Hexagonal and rhombic sheets have been observed and two different growth processes are revealed successfully, which are also the basic structures of boron nanosheets. An interesting phenomenon also have been discovered that high density nanotwins exist in β-Rhombohedra boron sheets and it might stimulate more interest in growth of nanomaterials.
硼因其独特的缺电子性质倾向于形成块状结构，因此硼很难大量形成薄片。在此，我们报道一种通过铜介质大量制备硼纳米片的新方法。该方法主要包括机械剥离、重组和萃取。在这项工作中制备出了大量高度低于6纳米的硼纳米片。X射线光电子能谱和拉曼光谱结果证实，这些纳米片具有高硼含量的α-菱形硼和β-菱形硼的特征。观察到了六边形和菱形薄片，并成功揭示了两种不同的生长过程，它们也是硼纳米片的基本结构。还发现了一个有趣的现象，即β-菱形硼薄片中存在高密度纳米孪晶，这可能会激发人们对纳米材料生长的更多兴趣。
