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Atomically Sharp Lateral Superlattice Heterojunctions Built-In Nitrogen-Doped Nanoporous Graphene.
Maria Tenorio1, Cesar Moreno1,2, Pol Febrer1
1Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, Barcelona, 08193, Spain.
Advanced Materials (Deerfield Beach, Fla.)
|March 25, 2022
Summary
Researchers created novel nanometer-scale lateral superlattices using graphene nanoribbons. This breakthrough enables precise control over band discontinuities for advanced quantum phenomena and material applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Lateral heterostructures offer 2D analogues to vertical Van der Waals heterostructures, enabling unique interfacial quantum phenomena.
- Challenges remain in controlling atomic precision, band discontinuities, and creating periodic superlattices in lateral heterostructures.
Purpose of the Study:
- To develop a synthetic strategy for fabricating nanometer-scale, coherent lateral superlattice heterojunctions with atomically sharp band discontinuities.
- To overcome current limitations in controlling interfaces and scaling down components in lateral heterostructures.
Main Methods:
- A novel on-surface reaction was employed to merge interdigitated arrays of different graphene nanoribbons.
- This method facilitates the creation of chemically heterogeneous nanoporous junctions within a superlattice structure.
Main Results:
- Successfully fabricated nanometer-scale, coherent lateral superlattice heterojunctions with atomically sharp band discontinuity.
- Obtained superlattices of 1D, chemically heterogeneous nanoporous junctions hosting subnanometer quantum dipoles and tunneling in-gap states.
Conclusions:
- The developed synthetic strategy enables precise control over lateral heterostructure fabrication at the nanoscale.
- These novel superlattices are expected to promote interfacial phenomena like interribbon excitons and selective photocatalysis, opening new avenues in quantum materials and catalysis.
