X射线光电子能谱
过渡金属
吸附
材料科学
离子
金属
化学计量学
纳米技术
化学工程
无机化学
化学
物理化学
催化作用
冶金
有机化学
工程类
作者
Xingxing Zhang,Jiuxiang Dai,Zhitong Jin,Xinwei Tao,Yunlei Zhong,Zemin Zheng,Xianyu Hu,Lin Zhang
出处
期刊:iScience
[Elsevier]
日期:2024-04-01
卷期号:27 (4): 109378-109378
标识
DOI:10.1016/j.isci.2024.109378
摘要
Reliable synthesis methods for high-quality, large-sized, and uniform two-dimensional (2D) transition-metal dichalcogenides (TMDs) are crucial for their device applications. However, versatile approaches to growing high-quality, large-sized, and uniform 2D transition-metal tellurides are rare. Here, we demonstrate an ion adsorption strategy that facilitates the Frank-van der Merwe growth of 2D transition-metal tellurides. By employing this method, we grow MoTe2 and WTe2 with enhanced lateral size, reduced thickness, and improved uniformity. Comprehensive characterizations confirm the high quality of as-grown MoTe2. Moreover, various characterizations verify the adsorption of K+ and Cl- ions on the top surface of MoTe2. X-ray photoelectron spectroscopy (XPS) analysis reveals that the MoTe2 is stoichiometric without K+ and Cl- ions and exhibits no discernable oxidation after washing. This top surface control strategy provides a new controlling knob to optimize the growth of 2D transition-metal tellurides and holds the potential for generalized to other 2D materials.
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