Carbon Nanostructures and Their Properties

Carbon nanostructures encompass a diverse family of materials in which carbon atoms adopt distinctive architectures at the nanometre scale. Zero-dimensional fullerenes, one-dimensional nanotubes and graphitic fibres, two-dimensional graphene and its molecular analogues, and three-dimensional porous networks each display a unique intersection of bond hybridisation, dimensional confinement and topology. Their properties range from exceptional mechanical strength and flexibility to remarkable electronic and thermal conductivities. Variations in hybridisation (sp² versus sp³), defect density and interlayer coupling permit precise tuning of electronic band gaps, optical absorption and chemical reactivity. Advances in synthesis—such as solution-based methods for ultrathin films, controlled pyrolysis of molecular precursors and template-directed assembly—have enabled centimetre-scale samples for both crystalline and amorphous forms. The global significance of these materials is underscored by applications in flexible electronics, high-performance transistors, energy storage, catalysis and nano-scale dielectric components. Interdisciplinary work now focuses on integration of distinct carbon allotropes into hybrid architectures to leverage synergistic properties for future technologies.

Research from Nature Portfolio

Scalable solution routes have been demonstrated to yield freestanding quasi-two-dimensional amorphous carbon membranes a few atomic layers thick. These sp²-rich films exhibit mechanical moduli around 400 GPa, dielectric strength exceeding 20 MV cm⁻¹ and low leakage currents, positioning them as promising gate dielectrics and ion-transport media in nanoelectronic devices. Molecular dynamics simulations of graphene under rapid cooling have revealed a two-dimensional glass transition, producing a stable, wrinkled glassy graphene with reduced thermal vibrations yet preserved mechanical integrity. Computational studies of a free-standing C₆₀ monolayer bound by van der Waals forces show thermal stability up to 600 K, elastic moduli of 55–100 GPa and tensile failure strains of 1.5–2.3 %, while strain engineering allows reversible tuning of the band gap by ±30 %, suggesting applications in flexible semiconductors and sensors.

Carbon Nanostructures and Their Properties publication trend

The graph below shows the total number of articles in carbon nanostructures and their properties across all publications each year (not limited to Nature Index journals).

Technical terms

Fullerene: Hollow carbon molecules composed of sp²-bonded atoms arranged in pentagonal and hexagonal rings.

Graphene: A single-atom-thick sheet of sp²-bonded carbon atoms in a hexagonal lattice.

Monolayer: A two-dimensional material consisting of a single layer of atoms or molecules.

Band gap: Energy difference between valence and conduction bands determining a material’s electronic conductivity.

van der Waals interaction: Weak attraction between molecules or layers arising from transient dipole-induced forces.

sp² hybridisation: Mixing of one s and two p orbitals to form three coplanar orbitals enabling planar bonding.

Photocatalysis: Acceleration of chemical reactions by light-activated materials that generate electron–hole pairs.

Dielectric strength: Maximum electric field a material can withstand without undergoing dielectric breakdown.

References

1. Ultrathin quasi-2D amorphous carbon dielectric prepared from solution precursor for nanoelectronics. Communications Engineering (2023).
2. Evidence of a two-dimensional glass transition in graphene: Insights from molecular simulations. Scientific Reports (2019).
3. Two-dimensional van der Waals C60 molecular crystal. Scientific Reports (2015).
4. Monolayer Fullerene Networks as Photocatalysts for Overall Water Splitting. Journal of the American Chemical Society (2022).
5. Structure and properties of graphullerene: a semiconducting two-dimensional C60 crystal. npj Computational Materials (2023).
6. Stability and Elasticity of Quasi-Hexagonal Fullerene Monolayer from First-Principles Study. Crystals (2023).