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Two-Dimensional Lateral Heterostructures Made by Selective Reaction on a Patterned Monolayer MoS2 Matrix
Xuewen Wang1, Bolun Wang1, Yonghuang Wu1
1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
ACS Applied Materials & Interfaces
|May 27, 2021
Summary
Researchers developed a new method for fabricating two-dimensional (2D) heterostructures, specifically molybdenum diselenide/molybdenum disulfide (MoSe2/MoS2) lateral structures. This technique enhances fabrication control and efficiency for future 2D electronic devices.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Two-dimensional (2D) heterostructures are vital for advanced electronics and optoelectronics.
- Precise fabrication of 2D heterostructures is essential for developing integrated circuits.
- Existing methods often lack the necessary control and efficiency for mass production.
Purpose of the Study:
- To demonstrate a controllable and efficient ex situ fabrication method for MoSe2/MoS2 lateral heterostructures.
- To enable the precise patterning of 2D heterostructures for integrated device applications.
Main Methods:
- Selective selenization of a laser-patterned, oxidized monolayer MoS2 (MoO3) region.
- Laser scanning oxidizes specific MoS2 areas to MoO3, followed by furnace selenization.
- Characterization using Raman spectroscopy and Auger electron spectroscopy to confirm heterostructure formation.
Main Results:
- Successfully fabricated MoSe2/MoS2 lateral heterostructures with desired patterns.
- The ex situ method separates laser patterning from selenization, significantly improving synthesis efficiency.
- Demonstrated a controllable approach for creating complex 2D heterostructure patterns.
Conclusions:
- The developed method offers a simple, controllable, and efficient route to patterned 2D lateral heterostructures.
- This approach facilitates the fast and mass integration of devices based on 2D heterostructures.
- Opens new possibilities for the development of advanced 2D electronic and optoelectronic circuits.
