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In this work we exploit the ability of spin-crossover molecules to switch between two spin states,
upon the application of external stimuli, to prepare smart molecular/2D heterostructures.
Through the chemical design of the hybrid interface, that involves a covalent grafting between
the two components, we obtain a hybrid heterostructure formed by spin-crossover nanoparticles
anchored on chemically functionalized monolayers of semiconducting MoS2. In the resulting
hybrid, the strain generated by the molecular system over the MoS2 layer, as a consequence of
a thermal or light-induced spin switching, results in a dramatic and reversible change of its
electrical and optical properties. This novel class of smart molecular/2D heterostructures could
open the way towards a novel generation of hybrid multifunctional materials and devices of
direct application in highly topical fields like electronics, spintronics or molecular sensing.