Tungsten Disulfide (WS₂)

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Tungsten disulfide (WS 2 ) powder has been used for many years as a dry lubricant due to how it exhibits similar properties to molybdenum disulfide (MoS 2 ), such as a low coefficient of friction, high chemical stability, and thermal stability. In 1992, it was discovered that the structure of WS 2 made it capable of forming nanotube structures. These nanotubes were the first examples of WS 2 being used as a low-dimensional material. After the discovery of simple mechanical exfoliation techniques to isolate single layers of 2D materials, it was possible to study the properties of WS 2 flakes. It was shown that, just like MoS 2 , the band-gap of WS 2 change from an indirect bandgap of 1.4eV to a direct bandgap of 2eV when changing from a bulk material to a 2D material. Due to its bandgap, WS 2 is seen as a significantly interesting material for many areas of application. Just like MoS 2 , WS 2 possesses a high on/off ratio in field-effect transistors, controllable spin and valley polarization, strong geometrical confinement of excitons, and tunable photoluminescence. Additionally, WS 2 could lead to increased interest in areas such as photodetectors and multi-junction photovoltaics. Browse Tungsten Disulfide Related categories: low dimensional materials , 2D materials [[filterby group="form" tags="powder, crystal, film"]][[split]] Resources and Support Tungsten Disulfide Properties Tungsten disulfide (WS 2 ) exits in different forms, each with their own beneficial properties. Bulk WS 2 offers advantages such as exceptional lubricity and high thermal stability. Read more... Introduction to 2D Materials The foundation of technology is the understanding of material systems. Specific material properties are required depending on the application. Read more...