Developing Scotch tape Exfoliation Methods for Two-Dimensional Magnetic Metal-Organic Frameworks

Abstract

The emergence of two-dimensional materials has transformed solid-state chemistry and condensed matter physics, yet intrinsic magnetism remains rare in atomically thin systems. Magnetic metal-organic frameworks (MOFs) offer a compelling and chemically versatile platform to address this challenge, combining tuneable magnetic interactions with crystal structures amenable to exfoliation. In this Review, we examine the development of the micro-mechanical "Scotch tape" method for the isolation of two-dimensional magnetic MOFs, benchmarking it against established exfoliation approaches and highlighting its unique ability to yield larger, higher-quality nanosheets. Through key case studies, we assess the current state of the field, identifying critical limitations including poor reproducibility, insufficient methodological reporting, challenges in crystal growth, and difficulties in applying surface-sensitive magnetic characterisation techniques. We further discuss how these barriers may be overcome through community-driven standardisation of exfoliation protocols, advances in crystal engineering, and the integration of computational and data-driven approaches to predict exfoliation behaviour. Finally, we outline emerging opportunities for tailoring magnetic and surface properties in MOF nanosheets, positioning Scotch tape exfoliation as a powerful yet underutilised route toward the rational design and discovery of next-generation two-dimensional magnetic materials.