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Domain-Dependent Surface Adhesion in Twisted Few-Layer Graphene: Platform for Moiré-Assisted Chemistry
Valerie Hsieh1, Dorri Halbertal1, Nathan R Finney1
1Department of Physics, Columbia University, New York, New York 10027, United States.
Nano Letters
|April 10, 2023
Summary
Stacking domains in twisted few-layer graphene exhibit unique surface chemistry. Manipulating nanoparticles on these domains can reconfigure the moiré superlattice, enabling new nanoengineering approaches.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Surface Chemistry
Background:
- Twisted van der Waals multilayers offer tunable electronic properties via multiple control degrees of freedom.
- Stacking domains, arising from layer twists, present an underexplored factor in controlling material behavior.
Purpose of the Study:
- To investigate the role of stacking domains in controlling surface chemistry within twisted few-layer graphene.
- To demonstrate the engineering of stacking domain-dependent surface chemistry and its impact on nanoengineering.
Main Methods:
- Utilized mid-infrared near-field optical microscopy and atomic force microscopy.
- Investigated selective adhesion of metallic nanoparticles and water on specific stacking domains (rhombohedral) in twisted graphene.
Main Results:
- Observed selective adhesion of metallic nanoparticles and liquid water at rhombohedral stacking domains.
- Demonstrated that nanoparticle manipulation can locally reconfigure the moiré superlattice at the micrometer scale.
Conclusions:
- Stacking domains in twisted graphene possess distinct surface chemistry.
- This work introduces a novel method for controlling moiré-assisted chemistry and nanoengineering through stacking domain manipulation.
Keywords:
nanoengineeringrhombohedral and Bernal stacking domainssurface chemistrytwisted graphene moiréMore Related Videos
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