Two-dimensional inorganic molecular crystals

Wei Han, Pu Huang, Liang Li, Fakun Wang, Peng Luo, Kailang Liu, Xing Zhou, Huiqiao Li, Xiuwen Zhang, Yi Cui () and Tianyou Zhai ()
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Wei Han: Huazhong University of Science and Technology (HUST)
Pu Huang: Shenzhen University
Liang Li: Huazhong University of Science and Technology (HUST)
Fakun Wang: Huazhong University of Science and Technology (HUST)
Peng Luo: Huazhong University of Science and Technology (HUST)
Kailang Liu: Huazhong University of Science and Technology (HUST)
Xing Zhou: Huazhong University of Science and Technology (HUST)
Huiqiao Li: Huazhong University of Science and Technology (HUST)
Xiuwen Zhang: Shenzhen University
Yi Cui: Stanford University
Tianyou Zhai: Huazhong University of Science and Technology (HUST)

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Two-dimensional molecular crystals, consisting of zero-dimensional molecules, are very appealing due to their novel physical properties. However, they are mostly limited to organic molecules. The synthesis of inorganic version of two-dimensional molecular crystals is still a challenge due to the difficulties in controlling the crystal phase and growth plane. Here, we design a passivator-assisted vapor deposition method for the growth of two-dimensional Sb2O3 inorganic molecular crystals as thin as monolayer. The passivator can prevent the heterophase nucleation and suppress the growth of low-energy planes, and enable the molecule-by-molecule lateral growth along high-energy planes. Using Raman spectroscopy and in situ transmission electron microscopy, we show that the insulating α-phase of Sb2O3 flakes can be transformed into semiconducting β-phase under heat and electron-beam irradiation. Our findings can be extended to the controlled growth of other two-dimensional inorganic molecular crystals and open up opportunities for potential molecular electronic devices.

Date: 2019
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DOI: 10.1038/s41467-019-12569-9

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