A research team at UCLA’s California NanoSystems Institute (CNSI) has engineered a stretchable, printable light-emitting membrane that may transform photonic device design. The new material is constructed from alternating layers of ultrathin molybdenum disulfide (MoS₂) and the polymer Nafion, combining optoelectronic performance with structural resilience. How the Light-Emitting Material WorksThe membrane comprises alternating 3-atoms thick layers of 2D MoS₂ sandwiched with Nafion, a polymer more commonly associated with fuel cells. The material’s performance over repeated stretching and environmental exposure (e.g. Durability under stress: Long-term reliability under repeated mechanical stretching, bending, and environmental stress is yet to be fully proven.