Graphene-Boron Nitride Heterostructures and Synthesis Techniques

Graphene and hexagonal boron nitride (h-BN) form complementary two-dimensional materials whose integration into heterostructures enables novel electronic, optical and thermal functionalities. Their nearly identical lattice constants and contrasting electronic characters—semimetallic graphene and insulating h-BN—facilitate both in-plane junctions and vertical stacks with atomically sharp interfaces. In-plane heterostructures, created by lateral stitching of graphene and h-BN domains, yield one-dimensional boundaries with tunable band alignments, while vertical stacks exploit van der Waals interactions to preserve intrinsic properties of each layer. Such architectures underpin advances in high-mobility transistors, tunnel diodes, spintronic devices and quantum Hall systems.

Synthetic strategies span a spectrum of chemical vapour deposition (CVD) approaches, epitaxial growth on metallic substrates, co-segregation and post-growth transfer techniques. Temperature modulation and precursor design enable selective in-plane or vertical assembly, while alloyed catalysts refine nucleation and grain boundaries. Control over domain size, orientation and interface sharpness remains crucial for scalable fabrication, driving research into wafer-scale processes, direct growth methodologies and etching-free integration. Collectively, these developments herald a versatile materials platform for next-generation nanoelectronics and optoelectronics.

Research from Nature Portfolio

Recent studies have demonstrated a one-step co-segregation method for wafer-scale growth of vertical graphene/h-BN heterostructures on nickel substrates. By annealing a metal source containing carbon, boron and nitrogen, large-area vertically stacked films are formed with atomically clean interfaces, enhancing device performance and uniformity. Complementary work has employed temperature-triggered chemical switching during CVD to direct either in-plane stitching or vertical stacking. Utilising benzoic acid precursors and precise thermal profiles, researchers achieved atomically patched lateral junctions with zigzag edges as well as aligned vertical stacks exhibiting moiré patterns, thereby offering a chemically designable route to high-quality heterostructures.

Graphene-Boron Nitride Heterostructures and Synthesis Techniques publication trend

The graph below shows the total number of articles in graphene-boron nitride heterostructures and synthesis techniques across all publications each year (not limited to Nature Index journals).

Technical terms

Graphene: A single atomic layer of carbon atoms arranged in a hexagonal lattice, notable for high electrical conductivity and mechanical strength.

Hexagonal boron nitride (h-BN): A two-dimensional insulating material with a honeycomb lattice similar to graphene, valued for chemical stability and dielectric properties.

Heterostructure: A composite material structure formed by the integration of two or more different crystal layers or domains, creating novel interface phenomena.

Chemical vapour deposition (CVD): A technique for depositing thin films by chemical reactions of gaseous precursors on a heated substrate under controlled conditions.

Van der Waals epitaxy: A growth mode in which layers adhere through weak van der Waals forces, permitting lattice-mismatched materials to stack without significant strain.

Co-segregation method: A synthesis approach where multiple elements diffuse and segregate simultaneously from a metal substrate to form stacked two-dimensional layers in a single annealing step.

References

1. Direct growth of large-area graphene and boron nitride heterostructures by a co-segregation method. Nature Communications (2015).
2. Temperature-triggered chemical switching growth of in-plane and vertically stacked graphene-boron nitride heterostructures. Nature Communications (2015).
3. Synthesis of High‐Quality Graphene and Hexagonal Boron Nitride Monolayer In‐Plane Heterostructure on Cu–Ni Alloy. Advanced Science (2017).
4. Spatially resolved one-dimensional boundary states in graphene–hexagonal boron nitride planar heterostructures. Nature Communications (2014).
5. In situ epitaxial engineering of graphene and h-BN lateral heterostructure with a tunable morphology comprising h-BN domains. NPG Asia Materials (2019).