Related Experiment Video
Updated: Aug 13, 2025
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Increasing coverage of mono-layer graphene grown on hexagonal boron nitride
Chengxin Jiang1,2,3, Lingxiu Chen1,4, Huishan Wang1,3
1State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
Researchers developed a new method using auxiliary sources to improve graphene film growth on hexagonal boron nitride (h-BN). This technique enhances nucleation density, leading to continuous, high-quality graphene films for advanced electronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Graphene on hexagonal boron nitride (h-BN) offers excellent electrical properties, crucial for advanced electronics.
- The performance of graphene/h-BN heterostructures is significantly influenced by graphene's domain size and boundaries.
- Chemical Vapor Deposition (CVD) is a key technique for synthesizing large-area graphene crystals.
Purpose of the Study:
- To address challenges in achieving high coverage of monolayer graphene on h-BN via CVD.
- To develop a method for synthesizing continuous graphene films on h-BN with improved nucleation control.
- To enhance the quality and coverage of graphene grown on h-BN substrates.
Main Methods:
- An auxiliary source strategy was employed to boost graphene nucleation density on h-BN.
- Investigated the use of silicon carbide and methyl methacrylate as auxiliary nucleation agents.
- Optimized growth temperature to suppress vertical accumulation of graphitic materials.
Main Results:
- Demonstrated that auxiliary sources significantly increase graphene nucleation density on h-BN.
- Achieved synthesis of continuous graphene films with enhanced coverage on h-BN.
- Optimized temperature control effectively minimized unwanted vertical growth of graphitic layers.
Conclusions:
- The auxiliary source strategy provides an effective approach for preparing continuous graphene films on h-BN.
- This method offers a new perspective for the growth of high-quality graphene on h-BN.
- The findings facilitate the development of advanced graphene-based electronic devices.
