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Toward Clean 2D Materials and Devices: Recent Progress in Transfer and Cleaning Methods.
Wenlong Dong1,2, Zhaohe Dai3, Luqi Liu1
1CAS Key Laboratory of Nanosystem and Hierarchical Fabrication and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China.
Advanced Materials (Deerfield Beach, Fla.)
|December 4, 2023
Summary
Developing clean two-dimensional (2D) materials is crucial for electronics and photonics. This perspective reviews transfer techniques, cleanliness assessment, and cleaning strategies to overcome contamination challenges in 2D material devices.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Science
Background:
- Two-dimensional (2D) materials offer revolutionary potential for electronics and photonics.
- Contaminants significantly impede the performance of 2D materials in devices, hindering their practical application.
Purpose of the Study:
- To provide an overview of recent advancements in developing clean 2D materials and devices.
- To highlight strategies for maintaining and improving the cleanliness of 2D materials throughout fabrication.
Main Methods:
- Review of conventional and novel wet and dry transfer techniques for 2D materials.
- Discussion of multi-scale methodologies for assessing the cleanliness of 2D material surfaces and interfaces.
- Presentation of passive and active cleaning strategies, including self-cleaning mechanisms, thermal annealing, and mechanical treatments.
Main Results:
- Effectiveness of various transfer techniques in preserving material cleanliness is evaluated.
- Assessment methodologies provide insights into surface and interface contamination.
- Cleaning strategies, particularly those leveraging self-cleaning principles and interface wetting, show promise.
Conclusions:
- Efficient transfer and cleaning are essential for unlocking the full potential of 2D materials.
- Understanding interface wetting is key to developing innovative cleaning and transfer methods.
- Further research can drive the practical application of high-performance 2D material-based devices.
