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Smart molecular/MoS2 Heterostructures Featuring Light and Thermally-Induced Strain Driven by Spin Switching
preprintsubmitted on 16.07.2020, 18:39 and posted on 17.07.2020, 12:49 by Ramón Torres-Cavanillas, Marc Morant-Giner, Garin Escorcia-Ariza, Julien Dugay, J. Canet-Ferrer, Sergio Tatay, Salvador Cardona-Serra, Dr. Mónica Giménez Marqués, Marta Galbiati, Alicia Forment-Aliaga, Eugenio Coronado
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.