Fundamental aspects of the electronic structure, materials properties and lubrication performance of sputtered MoS2 films

Raman Scattering Characterization of MoxW1-xS2Layered Mixed Crystals

“…The S-Mo-S sandwiches are bonded together by weak Van der Waals forces [2]. Layered semiconductors are potential candidates in various important technologies, such as solid lubricants [3][4][5], photovoltaic and polymer solar cells [6][7][8][9][10], and hydrosulphurization catalysts [11]. The possibility of obtaining MoS 2 by exfoliation of multilayered MoS 2 into single-layered MoS 2 nanosheets, followed by a Li-intercalation and exfoliation method [12,13] allowed the solution-based production and thin-film fabrication of MoS 2 sheets, which are applicable in highperformance electronics.…”

Applications of Surface Science to Solid Lubricants

“…rtowever, the nature of the deformation processes is governed by chemical and electronic properties of the materials that, in turn, determine the atomic arrangements and crystalline structural features of the solid (which can be very short range as will be discussed below). MoS 2 is probably the most graphic example of the significance of electronic structure on overall lubrication ability [6,7] MoS2 is one of a number of layered solids (its structure is shown in Figure 2), but one in which the layers appear to be held together by the weakest of forces, and yet it does maintain its shape. Its ability to lubricate depends on the fact that the reactivity of its basal planes is essentially nil so that they can slide over each other with little or no resistance (i.e.. provide low shear force).…”

“…The trigonal prismatic local structure in 2H-MoS 2 creates a central Mo 4 + ion bonded to six S2-ions, while each sulfide ion is, in turn, bonded to three molybdenum ions (see Figure 2). Inorganic chemists normally focus on metal-centered complexes, and a qualitative MO diagram for MoS 2 in an appropriate cluster with D3h symmetry, first reported by this research group [6,7], has been slightly modified and is given in Figure 4. This MO diagram predicts the existence of five different occupied valence levels, in agreement with the five major peaks in the PES data.…”

Electronic, Structural, and Electrochemical Modulation of Electrostatic Self-Assembled 1T-MoS₂Nanosheets via Topotactic Structural Conversion

“…† Corresponding author: k-fukuda@saci.kyoto-u.ac.jp nanoderivative of the versatile MoS 2 with a variety of applications including lubricants [13], catalysts [14,15], and batteries [16][17][18][19]. The pristine MoS 2 has a layered structure composed of MoS 2 slab stacks, each of which consists of two atomic layers of S with an atomic Mo layer between them.…”