光电子学
制作
基质(水族馆)
图层(电子)
自组装单层膜
化学工程
蚀刻(微加工)
外延
复合材料
作者
Mehrnaz Mojtabavi,Armin VahidMohammadi,Karthik Ganeshan,Davoud Hejazi,Sina Shahbazmohamadi,Swastik Kar,Adri C. T. van Duin,Meni Wanunu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-01-06
卷期号:15 (1): 625-636
被引量:12
标识
DOI:10.1021/acsnano.0c06393
摘要
Bottom-up assembly of two-dimensional (2D) materials into macroscale morphologies with emergent properties requires control of the material surroundings, so that energetically favorable conditions direct the assembly process. MXenes, a class of recently developed 2D materials, have found new applications in areas such as electrochemical energy storage, nanoscale electronics, sensors, and biosensors. In this paper, we present a lateral self-assembly method for wafer-scale deposition of a mosaic-type 2D MXene flake monolayer that spontaneously orders at the interface between two immiscible solvents. ReaxFF molecular dynamics simulations elucidate the interactions of a MXene flake with the solvents and its stability at the liquid/liquid interface, the prerequisite for MXene flakes self-assembly at the interface. Moreover, facile transfer of this monolayer onto a flat substrate (Si, glass) results in high-coverage monolayer films with uniform thickness and homogeneous optical properties. Multiscale characterization of the resulting films reveals the mosaic structure and sheds light on the electronic properties of the films, which exhibit good electrical conductivity over cm-scale areas.
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