In accordance with an example embodiment of the present invention, a method is disclosed. The method comprises providing a two-dimensional object comprising a lll-V group material, e.g. Boron nitride (BN), Boron carbon nitride (BCN), Aluminium nitride (AIN), Gallium nitride (GaN), Indium Nitride (InN), Indium phosphide (InP), Indium arsenide (InAs), Boron phosphide (BP), Boron arsenide (BAs), and Gallium phosphide (GaP) and/or a Transition Metal Dichalcogenides (TMD) group material, e.g Molybdenum sulfide (MoS2), Molybdenum diselenide (MoSe2), Tungsten sulfide (WS2), Tungsten diselenide (WSe2), Niobium sulfide (NbS2), Vanadium sulfide (VS2,), and Tantalum sulfide (TaS2) into an environment comprising oxygen; and exposing at least one part of the two-dimensional object to photonic irradiation in said environment, thereby oxidizing at least part of the material of the exposed part of the two-dimensional object.

In one aspect, the present invention provides a solid-state electrolyte material. The solid-state electrolyte material comprises a composition of Formula (XX), (XX-A), (XX-B), (XX-C), (I), (Ia), and/or (Ib), as described herein. Another aspect provides a method of making a green body. A further aspect provides a method of making a sintered solid-state electrolyte material.

In one aspect, the present invention provides a solid-state electrolyte material. The solid-state electrolyte material comprises a composition of Formula (XX), (XX-A), (XX-B), (XX-C), (I), (Ia), and/or (Ib), as described herein. Another aspect provides a method of making a green body. A further aspect provides a method of making a sintered solid-state electrolyte material.