Nanowerk January 20, 2022
So far, only a few dozen 2D crystals have been extracted from materials that exhibit a layered phase in ambient conditions, omitting entirely the large number of layered materials that may exist at other temperatures and pressures. An international team of researchers (Austria, Germany, Slovakia, Belgium, France) synthesized 2D cuprous iodide that was stabilized in a graphene sandwich, as the first example of a material that does not otherwise exist in normal laboratory conditions. It normally only occurs in layered form at elevated temperatures between 645 and 675 K. The synthesis utilizes the large interlayer spacing of oxidized graphene multilayers, which allows iodine and copper atoms to diffuse into the gap and to grow the new material. The graphene layers have an important role imposing a high pressure on the sandwiched material that thus becomes stabilized. The researchers have already expanded the synthesis method to produce other new 2D materials. According to the researchers the method seems to be truly universal, providing access to dozens of new 2D materials…read more. Open Access TECHNICAL ARTICLEÂ
A film of reduced graphene oxide (rGO) incorporating 2D h-CuI (the rule shows a centimeter scale)… Credit: Advanced Materials, 07 December 2021Â