Jiadong Zhou1*
1School of Physics, Beijing Institute of Technology, Beijing 100081, China
EXTENDED ABSTRACT: Two-dimensional (2D) materials including different systems such as single elementary, binary and ternary crystals have drawn intensive attention over the past decade as they possess fundamentally novel physical phenomena with potential applications in quantum devices and information technology. Up to now, bottom-up methods such as CVD, metalorganic CVD have been exploited for achieving different types of 2D materials. However, synthesis of 2D materials is still difficult. Here, we first report the molten-assisted CVD, which can be achieved by controlling the growth temperature and salt mass. Therefore, the preparation efficiency reaches about 100%. Furthermore, the controllable synthesis of 2D (V-, Cr-, Mn-, Fe-, Co-, Ni-, Cd- and Pd-based) binary chalcogenides with different phases/compositions remains challenging, especially for the preparation of the 2D metal phosphorous chalcogenides (TMPCs) crystals. Meanwhile, the superlattices were often obtained via epitaxial growth or assembled by stacking 2D materials through different methods. In view of structures and dimensions, the reported superlattices belong to the 3D-3D, 2D-2D, and 1D-1D. So far, realization of the intrinsic heterodimensional superlattice formed between the intrinsic 2D (or 3D) and 1D is still a big challenge in experiments. In this report, I introduce a competitive-chemical reaction growth mechanism and thus chemical reactions of 2D crystals with the defined phase, controllable structure, and tunable component can be realized. More importantly, a new type of heterodimensional intrinsic superlattice structure in V-based 2D superlattice grown directly via a one-step chemical vapor deposition (CVD) method. This superlattice is a periodic structure of2D VS2 layer and 1D VS chain layer.
Keywords: 2D Materials, CVD, ferromagnetism, supperconductivity
REFERENCES
[1] JD Zhou*, et al, Nature,609, (2022) 46-51
[2] JD Zhou, et al, Nature,556, (2018) 355-359
[3] JD Zhou*, et al, Nature Materials, (2022), doi.org/10.1038/s41563-022-01291-5
Jiadong Zhou, a full professor at Beijing Institute of Technology, has completed his PhD and Postdoctoral Studies from School of Materials and Engineering, Nanyang Technological University, Singapore. He has published more than 100 papers in Nature (2 papers), Nature Materials, Nature Electronics and so on.