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Ink-jet patterning of graphene by cap assisted barrier-guided CVD
Ding-Rui Chen1, Sheng-Kuei Chiu2, Meng-Ping Wu1
1Graduate Institute of Opto-Mechatronics, National Chung Cheng University Chiayi 62102 Taiwan.
RSC Advances
|May 9, 2022
Summary
Researchers enhanced the stability of inkjet-printed barriers for graphene growth, enabling high-resolution patterns. This breakthrough improves graphene device conductivity and reduces defects for advanced printed electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Electronics Engineering
Background:
- Barrier-guided chemical vapor deposition (CVD) offers a promising route for scalable 2D material synthesis.
- Existing barrier materials lack stability under CVD growth conditions, limiting their use in high-resolution patterning.
- Hydrogen etching rapidly degrades barriers, hindering the integration of 2D materials into electronic devices.
Purpose of the Study:
- To enhance the stability of inkjet-deposited barriers for high-quality graphene growth.
- To enable high-resolution patterning of graphene using a more robust barrier system.
- To improve the performance of graphene-based electronic devices through advanced fabrication techniques.
Main Methods:
- Modifying etching kinetics under confinement to stabilize barrier films.
- Utilizing inkjet deposition for barrier application.
- Conducting graphene growth via CVD for extended periods (up to 6 hours).
- Characterizing barrier stability and graphene quality.
Main Results:
- Stabilized barrier films retained high-resolution patterns after 6 hours of graphene growth.
- Microscopic graphene devices showed a 6-order-of-magnitude increase in conductivity.
- Graphene defectiveness decreased by 48 times compared to previous methods.
- Fabricated devices demonstrated superior performance over those made with traditional lithography.
Conclusions:
- Enhanced barrier stability is crucial for high-resolution patterning in barrier-guided CVD growth.
- The developed method significantly improves graphene quality and device performance.
- This approach holds potential for scalable and cost-effective printed electronics applications.
