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Title: Low-temperature substitutional growth of two-dimensional metal chalcogenides
Abstract:Two-dimensional (2D) metal chalcogenides (MCs), including metallic MCs (e.g., VS2, CoS2, TiX2), semiconducting MCs (e.g., MoS2, WS2, SnSe2), and topological insulating MCs (e.g., Bi2Se3, Bi2Te3) are promising nanomaterials with rich applications (e.g., detectors, memory, and emitters) that can be integrated onto a wafer platform. However, the direct growth of most 2D MCs using chemical vapor deposition (CVD) requires higher temperatures generally ranging from 550 to 1000 °C, to obtain sufficient crystallinity, where the high temperature typically complicates the integration of multiple components on the wafer. Therefore, it is desirable to develop a universal strategy enabling the low-temperature (<450 °C; compatible with the BEOL in microelectronics) growth of 2D MC materials so that adding new materials will not degrade the already existing components. In this talk, I will present a two-step substitutional epitaxial strategy that enables the low-temperature growth of 17 different 2D metal chalcogenides on mica or on transition metal dichalcogenides (TMD) to form MC/TMD heterostructures, showing a promising pathway for the integration of different high-quality 2D materials.
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Representative papers:
[1] Zhang, K.; She, Y.; Cai, X.; Zhao, M.; Liu, Z.; Ding, C.; Zhang, L.; *, Zhou, W.; Ma, J.; Liu, H.; Li, L.-J.;*, Luo, Z.;* Huang, S.;* Epitaxial substitution of metal iodides for low-temperature growth of 2D metal chalcogenides, Nature Nanotech. 2023.
[2] Tamtaji, M.; Peng, Q.; Liu, T.; Zhao, X.; Xu, Z.; Galligan, P.R.; Hossain, M.D.; Liu, Z.; Wong, H.; Liu, H.; Amine, K.; Zhu, Y.; Goddard II, W.A.; Wu, W.; Luo, Z.; Non-bonding Interaction of Dual Atom Catalysts for Enhanced Oxygen Reduction Reaction. Nano Energy, 2023, 108218
[3] You, J., You, J.; Pan, J.; Shang,S.; Xu, X.; Liu, Z.; Li, J.; Liu, H.; Kang, T.; Xu, M.; Li, S.; Kong, D.; Wang*,W.; Gao,Z.; Zhou, X.; Zhai, T.; Liu, Z.; Kim, J.K.;* Luo, Z.;* Salt-Assisted Selective Growth of H-phase Monolayer VSe2 with Apparent Hole Transport Behavior. Nano Letters, 2022, 22(24): 10167-10175.
[4] Hossain, Md D.; Huang, Y.; Yu, T.H.; Goddard, W. A. II* and Luo, Z. * Reaction mechanism and kinetics for CO2 reduction on Ni SAC from quantum mechanics, Nature Comm. 2020, 11, 2256.
[5] Hossain, M. D.; Liu, Z.; Zhuang, M.; Yan, X.; Xu, G. -L.; Gadre, C. A.; Tyagi, A.; Abidi, I. H.; Sun, C. -J.; Wong, H.; Guda, A.; Hao, Y.; Pan, X.; Amine, K.; Luo, Z.*; Rational Design of Graphene-Supported SAC for HER, Adv. Energy Mater. 2019.
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