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固定前体粒子驱动的厘米大小的MoTe2单层增长

Liang Ma¹, Juntong Zhu¹, Wei Li¹

¹College of Energy, Soochow Institute for Energy and Materials Innovations, and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215123 China.

Journal of the American Chemical Society

|August 10, 2021

概括

研究人员开发了一种新方法,用于种植大面积,高质量的二甲 (MoTe2) 一层. 这一突破利用固定前体粒子和离子吸收来控制生长,为先进的电子应用铺平了道路.

科学领域:

材料科学
凝聚物质物理学
纳米技术

背景情况:

二化物 (MoTe2) 在旋转电子和相位工程方面具有前景.
在电子应用中,获得大面积,高质量的MoTe2膜至关重要.
目前种植大面积单层MoTe2的方法面临重大挑战.

研究的目的:

开发一种高效且方便的方法来培养厘米大小的单临床MoTe2单层.
为了阐明涉及固定前体粒子的生长机制.
研究离子在控制MoTe2生长中的作用.

主要方法:

一个厘米大小的单临床MoTe2单层的生长.
微观表征以观察前体颗粒的消耗.
飞行时间二次离子质谱 (ToF-SIMS) 检测离子.
第一原则密度函数理论 (DFT) 的计算.

主要成果:

通过固定前体粒子驱动的增长成功地培养出一厘米大小的单体MoTe2单层.
观察到单层生长的前体粒子的持续消耗.
已证实MoTe2表面的氧离子附着,抑制[001]区域轴的生长.
DFT计算证实了生长机制和离子吸收.
作为成长的MoTe2单层表现出较低的表面粗度 (0.19 nm) 和良好的导电性 (1.5 × 10^-5 S/m).
通过电气测量证明了单体MoTe2的典型半金属性质.

结论:

阐明了大面积MoTe2单层的固定前体粒子驱动生长的微观过程.
通过离子吸收来控制二维材料生长的新方法.
这些发现为种植各种其他二维材料提供了新的视角.
开发的方法有助于为潜在的电子应用生产高质量的MoTe2.

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