Breakthrough in Self-Strengthened hBN/Graphene Moiré Superlattice Membranes

A research team from Peking University has published a significant study in Advanced Functional Materials. They designed and fabricated a self-strengthened two-dimensional hBN/graphene (hBN/Gr) Moiré superlattice membrane that exhibits exceptional mechanical strength and toughness under extreme thermal shock conditions.

Experimental studies combined with molecular dynamics simulations revealed that the asymmetric lattice structure of hBN promotes stable crack propagation, thereby enhancing the fracture toughness of the hBN/Gr superlattice. Remarkably, the membrane retained ~95% of its structural integrity after 200 thermal shock cycles, compared to ~50% for bilayer graphene membranes.

Furthermore, this Moiré superlattice membrane was successfully employed as a support for the synthesis and stabilization of uniformly distributed high-entropy alloy nanoparticles (HEA-NPs).

This work not only provides new strategies for engineering 2D materials with superior strength and toughness, but also opens up promising pathways for their applications under extreme conditions.

For more information：https://doi.org/10.1002/adma.202502792