Researchers have made advancements in growing single-crystalline films using van der Waals epitaxy, a technique that allows for the growth of thin films on various substrates. The films, including nitride and semiconductor materials, have been grown on substrates such as amorphous graphene-glass wafers and epitaxial graphene. The development of these films could potentially be used in the creation of transistors and other devices, although the specific applications and outcomes are not clear.