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Abstract

The microstructure of molybdenum disulphide and tungsten disulphide unsupported catalysts have been characterized by high-resolution electron microscopy. Lattice resolution of edge planes shows the typical layered structure, however in this case, additional phase curvature and dislocations are seen. The material shows a micro-domain arrangement where planes like (101), (103) and (105) are identified based in the interplanar spacings. In other cases the (002) basal plane was found to exhibit plane shifts or kinks.

Reactive magnetron sputtering of tungsten disulfide (WS2−x) films: Influence of deposition parameters on texture, microstructure, and stoichiometry

“…This is due to the fact that the growth rate of the ͑100͒-oriented crystallites ͑growth perpendicular to the c axis͒ is much higher ͑about a factor of 5͒ compared to the growth along the c axis. 36,37 Cross-sectional TEM ͑XTEM͒ micrographs were prepared in order to study the atomic structure of the films ͑Fig. 8͒.…”

WS2 Nanotubes: Electrical Conduction and Field Emission Under Electron Irradiation and Mechanical Stress

“…In particular, WS 2 has a layered structure where monolayers, constituted by a plane of W atoms sandwiched between two planes of S atoms, are piled on top of each other and bonded by weak van der Waals forces. WS 2 presents a highly anisotropic nature which is reflected in its mechanical, [ 21 ] optoelectronic, and electrical properties, [ 22 ] and has been proposed for several applications, such as solar cells [ 23 ] and catalysis, [ 24,25 ] or used as a solid lubricant. [ 26 ] Since the electronic properties of INTs mostly derive from the bulk material counterpart, multi‐walled WS 2 NTs are exclusively semiconductors, with a well‐defined band gap ranging from 0.1 to 1.9 eV, depending on their diameter.…”

Metal‐sulfide assisted rapid crystallization of highly (001)‐textured tungsten disulphide (WS2) films on metallic back contacts

“…Tungsten disulfide (WS 2 ) is a layer‐type semiconductor, which has been investigated for more than 30 years as lubricant 1, 2, catalyst 3, or as an absorber layer for thin film solar cells 4. WS 2 crystallizes in the layer‐type crystal structure, which consists of a sandwich‐like stacking of S–W–S triple layers free of dangling bonds on the van der Waals‐type surfaces, composed of sulfur atoms.…”