Liu Zunyu, Zhao Chaoyu, Jia Shuangfeng, Meng Weiwei, Li Pei, Yan Shuwen, Cheng Yongfa, Miao Jinshui, Zhang Lei, Gao Yihua, Wang Jianbo, Li Luying
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China.
Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430061, China.
Front Optoelectron. 2023 Nov 16;16(1):35. doi: 10.1007/s12200-023-00091-2.
Multi-dimensional heterojunction materials have attracted much attention due to their intriguing properties, such as high efficiency, wide band gap regulation, low dimensional limitation, versatility and scalability. To further improve the performance of materials, researchers have combined materials with various dimensions using a wide variety of techniques. However, research on growth mechanism of such composite materials is still lacking. In this paper, the growth mechanism of multi-dimensional heterojunction composite material is studied using quasi-two-dimensional (quasi-2D) antimonene and quasi-one-dimensional (quasi-1D) antimony sulfide as examples. These are synthesized by a simple thermal injection method. It is observed that the consequent nanorods are oriented along six-fold symmetric directions on the nanoplate, forming ordered quasi-1D/quasi-2D heterostructures. Comprehensive transmission electron microscopy (TEM) characterizations confirm the chemical information and reveal orientational relationship between SbS nanorods and the Sb nanoplate as substrate. Further density functional theory calculations indicate that interfacial binding energy is the primary deciding factor for the self-assembly of ordered structures. These details may fill the gaps in the research on multi-dimensional composite materials with ordered structures, and promote their future versatile applications.
多维异质结材料因其具有诸如高效率、宽带隙调节、低维限制、多功能性和可扩展性等引人入胜的特性而备受关注。为了进一步提高材料的性能，研究人员使用了各种各样的技术将不同维度的材料结合起来。然而，此类复合材料生长机制的研究仍然不足。本文以准二维（准2D）锑烯和准一维（准1D）硫化锑为例，研究了多维异质结复合材料的生长机制。它们是通过简单的热注入法合成的。观察到生成的纳米棒在纳米片上沿六重对称方向取向，形成有序的准1D/准2D异质结构。综合透射电子显微镜（TEM）表征证实了化学信息，并揭示了SbS纳米棒与作为基底的Sb纳米片之间的取向关系。进一步的密度泛函理论计算表明，界面结合能是有序结构自组装的主要决定因素。这些细节可能填补有序结构多维复合材料研究中的空白，并促进其未来的广泛应用。
