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Updated: Jun 2, 2026
09:25
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
Reversible Interlayer Coupling/Decoupling in Bilayer Graphene Regulated by Electrochemical Hydrogenation.
Yanbo Zhang1,2, Yizhe Wang3, Wenchang Zhang1,2
1Department of Materials Science and Engineering, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China.
Precision Chemistry
|June 1, 2026
Summary
Researchers demonstrate reversible control over bilayer graphene (BLG) interlayer coupling using electrochemical hydrogenation. This method precisely tunes van der Waals interactions, offering new pathways for functionalizing 2D materials.
Area of Science:
- Materials Science
- Surface Chemistry
- Condensed Matter Physics
Background:
- Chemical functionalization alters graphene properties by modifying π electrons.
- Direct control of interlayer interactions in bilayer graphene (BLG) via functionalization is challenging.
- Understanding interlayer coupling is crucial for designing advanced 2D materials.
Purpose of the Study:
- To report the in situ observation of reversible interlayer coupling/decoupling in BLG.
- To investigate the effect of electrochemical hydrogenation on BLG's interlayer interaction.
- To provide insights into regulating interlayer interactions in van der Waals stacking materials.
Main Methods:
- Electrochemical hydrogenation using an organic electrolyte containing protons.
- In situ observation of changes in BLG.
- Raman spectroscopy to detect new vibrational modes.
- Density Functional Theory (DFT) simulations.
Main Results:
- Electrochemical potential induced preferential hydrogenation of one graphene layer in BLG.
- New Raman modes were observed, indicating chemical changes.
- The other graphene layer remained largely intact, preserving high electric conductance.
- DFT simulations identified 4H-BLG as a key intermediate structure.
- Hydrogenation modified van der Waals interaction via sp³ bonding.
Conclusions:
- Electrochemical hydrogenation offers a method for reversible control of interlayer coupling in BLG.
- Surface functionalization can effectively tune interlayer interactions in van der Waals materials.
- This provides a new strategy for designing and manipulating 2D materials with tailored properties.
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