Tungsten TMDs (WS 2 , WSe 2 , WTe 2 ; henceforth collectively denoted as WX 2 ) are important for applications in catalysis , optoelectronics , spintronics , gas sensors , antibacterial activity , etc. Moreover, there are a wide range of methods available to synthesise these materials such as chemical vapour deposition , atomic layer deposition , and exfoliation .This makes tungsten TMDs useful as engineering materials, rather than just as simple model systems.