Growth dynamics of pulsed laser deposited WS2 thin films on different substrates

Extremely Reduced Dielectric Constant and Band Gap Enhancement in Few-Layered Tungsten Disulfide Nanosheets

“…Recently, two-dimensional (2D) materials such as graphene and inorganic graphene analogue, i.e., transition metal dichalcogenides (TMDCs) of type MX 2 (M = Mo or W and X = S, Se, or Te), have triggered an extensive interest due to their intriguing physical, thermal, and chemical properties. − Unlike graphene, which consists of a single carbon atomically thick layer, the TMDCs, such as WS 2 , MoS 2 , and WSe 2 , have a “sandwich” type structure where a transition metal layer (e.g., Mo or W) is arranged in a sandwiched structure between two chalcogen layers (e.g., S, Se, or Te) . Recently, various 2D materials such as MXene, graphene, and MoS 2 have been used as electromagnetic absorber, and they have been successfully utilized to fabricate wearable, hydrophobic, and EMI shielding devices. − Graphene-based flexible multifunctional microsensors based on electromagnetic response and plasma resonance have also been reported. , The dielectric and optical properties of 2D functional materials have been also used to design lightweight nanoscale electromagnetic devices with high efficiency. − The performance of the EM shielding of the flexible devices strongly depends on the UV absorption, band gap, and dielectric polarizability of the 2D materials under various frequency ranges. , Therefore, investigation of the optical and dielectric properties of the 2D materials such as WS 2 nanosheets is crucial to fabricate next-generation electronic devices …”

“…11−14 The performance of the EM shielding of the flexible devices strongly depends on the UV absorption, band gap, and dielectric polarizability of the 2D materials under various frequency ranges. 15,16 Therefore, investigation of the optical and dielectric properties of the 2D materials such as WS 2 nanosheets is crucial to fabricate next-generation electronic devices. 16 Particularly, WS 2 has attracted huge attention due to the outstanding and distinctive physical, optical, chemical, and electronic properties.…”