Graphene-Diamond Hybrid Structures and Electronic Properties

Graphene–diamond hybrids marry the exceptional carrier mobility and two‐dimensionality of graphene with the wide bandgap, thermal conductivity and chemical stability of diamond. At the atomic scale, these hybrids exploit the contrast between sp²‐bonded carbon in graphene and sp³‐bonded carbon in diamond to engineer interfaces that modulate charge transfer, doping level and phonon scattering. Through careful control of surface termination, lattice alignment and external stimuli such as pressure or temperature, researchers have demonstrated tunable bandgaps, topological electronic phases and enhanced carrier lifetimes. Such versatility underpins emerging applications in high‐frequency transistors, radiation detectors, chemical and biological sensors, and neuromorphic photonic devices. The carbon–carbon interface offers a contamination‐resistant platform that minimises extrinsic scattering, while the mechanical robustness of diamond allows for high‐power and high‐temperature operation beyond the reach of conventional semiconductors.

Research from Nature Portfolio

Seminal work established that graphene transferred onto hydrogen‐terminated nanodiamond monolayers exhibits up to 60% greater carrier mobility compared with graphene on silicon oxide. The strong C–H bonds at the interface induce a uniform charge redistribution that suppresses impurity scattering and shifts the Fermi level. Field‐effect transistors fabricated on these all‐carbon heterostructures demonstrated high current densities and stable gate control, paving the way for carbon‐on‐carbon electronics with reduced thermal noise and improved longevity. This foundational approach remains a benchmark for designing ultrawide‐bandgap devices and underpins many subsequent developments in carbon heterostructures.

Graphene-Diamond Hybrid Structures and Electronic Properties publication trend

The graph below shows the total number of articles in graphene-diamond hybrid structures and electronic properties across all publications each year (not limited to Nature Index journals).

Technical terms

sp2 hybridisation: Carbon bonding state with three planar σ bonds and one π bond, as found in graphene.

sp3 hybridisation: Tetrahedral carbon bonding state with four σ bonds, as found in diamond.

Heterostructure: Engineered interface between two or more crystalline materials with differing electronic properties.

Bandgap: Energy difference between valence and conduction bands dictating a material’s electrical conductivity.

Dirac cone: Linear energy–momentum relation near graphene’s Fermi level, giving rise to massless charge carriers.

Field‐effect transistor (FET): Device that modulates channel conductivity through an applied gate electric field.

References

1. Graphene-Nanodiamond Heterostructures and their application to High Current Devices. Scientific Reports (2015).
2. Graphite–hexagonal diamond hybrid with diverse properties. Applied Physics Reviews (2023).
3. Enhanced Hall mobility in graphene-on-electronic-grade diamond. Applied Physics Letters (2023).
4. Ab initio study of the effect of 2D layer rippling on the electronic properties of 2D/H-terminated diamond (100) heterostructures. Journal of Materials Research (2021).