Heterostructures between graphene and PtSe 2 nanolayers

Abstract This study presents the synthesis and characterization of van der Waals heterostructures composed of graphene and platinum diselenide (PtSe 2 ), with two distinct stacking configurations: PtSe 2 /Graphene and Graphene/PtSe 2 . These systems provide a platform to investigate how interfacial interactions and stacking order influence the overall optoelectronic properties. The heterostructures were analysed using Atomic Force Microscopy (AFM), Raman spectroscopy, and UV-Vis-NIR absorption spectroscopy. The analyses confirm the successful fabrication and structural integrity of the heterostructures, revealing that the optical and vibrational properties are dependent on the specific layer arrangement. Our findings highlight the potential for tuning the system’s behaviour through structural design, demonstrating a viable pathway for engineering novel electronic and optoelectronic devices.