Topic: 2D Materials and Heterostructures for Next-Generation Micro-Nano Devices

Two-dimensional (2D) materials and their van der Waals heterostructures have matured in laboratory and then become important platform for future electronics, photonics, spintronics, and energy applications. This Special Issue collect original research, perspectives and reviews ranging from precise synthesis and interface physics to functional device fabrication.

We invite contributions addressing the controlled, wafer-scale synthesis of graphene, transition-metal dichalcogenides, hexagonal boron nitride, MXenes, metallene, perovskites, emerging layered magnets, confined low-dimensional geometries, and other related 2D layered structures (BiOSe, MnBiTe, MoSi₂N4, MOF and COF), as well as their post-treatment strageties, e.g., transfer techniques, thermal annealing, and laser-based manufacturing. A second focus addresses the interfaces that define devices : the van der Waals gap, single-crystal metal contacts, and the contact and dielectric engineering that assist transistor scaling. Heterostructure development remains vital, including twisted and moiré superlattices, band alignment, light absorption and emission, correlated and topological states, and quantum wells.

The issue also encourages topics bridging physics and applications: 2D-based microprocessors, lab to fab, and foundry integration, low-resistivity interconnects, flexible and wearable electronics, optoelectronics and co-packaged optics, gas and biological sensing, 2D magnetism and skyrmions for spintronics, quantum sensing with spin defects, and 2D materials for catalysis and energy conversion. Theory, machine-learning-assisted discovery, and in situ characterization that elevate these directions are welcome.

By covering synthesis, interface science, heterostructure physics, and device applications, this Special Issue aims to evaluate how atomically thin materials will satisfy the requirements of scaling, energy efficiency, and new quantum functionalities. We welcome submissions from established groups and early-career investigators worldwide.