Two-Dimensional Nanosheet Materials and Applications

Two-dimensional nanosheet materials comprise atomically thin layers of crystalline matter whose lateral dimensions far exceed their thickness. Since the isolation of graphene, the field has grown to embrace a broad family of inorganic and hybrid compositions, including transition metal oxides, perovskite oxides, transition metal dichalcogenides and MXenes. These nanosheets exhibit unique electronic, optical, mechanical and chemical properties deriving from quantum confinement, high surface‐to‐volume ratios, strong in‐plane bonding and weak interlayer forces. Advances in exfoliation, chemical synthesis and assembly have enabled wafer-scale integration and the fabrication of flexible, conformal devices. Applications span from high-performance photodetectors, neuromorphic sensors and transparent electrodes to supercapacitors, catalysis, ferroelectric memory elements and tribological coatings. The convergence of precise thickness control, scalable processing and multifunctional integration underscores the global significance of two-dimensional nanosheets for next-generation electronics, energy conversion and storage, environmental technologies and biomedical systems.

Research from Nature Portfolio

Recent studies have demonstrated wafer-scale integration of perovskite-oxide nanosheets via a charge-assisted oriented assembly approach, yielding highly oriented films with shallow-trap-dominated electronic behaviour. These large-area arrays deliver single-nanosheet performance in photosensitivity and sub-microsecond response times, enabling flexible imaging arrays that recognise multidirectional motion trajectories with over 99.8 per cent accuracy. In parallel, a universal optical-contrast method has been established for rapid layer-counting of oxide nanosheets on engineered substrates. This technique exploits wavelength-dependent reflectivity on optimised dielectric coatings to distinguish monolayer through multiple-layer regimes with clear contrast changes, thereby providing a standardised tool for thickness-dependent studies and quality control in device fabrication.

Two-Dimensional Nanosheet Materials and Applications publication trend

The graph below shows the total number of articles in two-dimensional nanosheet materials and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Nanosheet: An ultrathin, two-dimensional crystalline layer whose thickness is on the order of a few atomic layers and whose lateral dimensions are much larger, leading to anisotropic physical properties.

Exfoliation: A process by which layered materials are delaminated into individual nanosheets, using mechanical, chemical or thermal methods to overcome interlayer forces.

van der Waals interactions: Weak, non‐covalent forces between adjacent layers in a material, enabling easy separation into nanosheets without disrupting strong in‐plane bonds.

Langmuir–Blodgett method: A technique for transferring a monolayer or multilayer film of nanosheets from a liquid–air interface onto a solid substrate with controlled orientation and packing density.

Quantum confinement: The effect in nanoscale materials where the motion of charge carriers is restricted in one or more dimensions, leading to discrete energy levels and modified optical and electronic properties.

Dielectric permittivity: A measure of a material’s ability to polarise in response to an electric field, relevant for capacitors and insulating layers in electronic devices.

Ferroelectricity: The property of certain materials to exhibit a reversible spontaneous electric polarisation that can be switched by an applied electric field, useful for non-volatile memory applications.

References

1. Wafer-scale integration of two-dimensional perovskite oxides towards motion recognition. Nature Communications (2024).
2. Atomically Thin 2D Transition Metal Oxides: Structural Reconstruction, Interaction with Substrates, and Potential Applications. Advanced Materials Interfaces (2018).
3. Metal Oxide Nanosheets as 2D Building Blocks for the Design of Novel Materials. Chemistry - A European Journal (2020).
4. Chemically exfoliated inorganic nanosheets for nanoelectronics. Applied Physics Reviews (2022).