MoS2(0001)/MoO3(010)/MoS2(0001) friction-reducing system

Single-crystal micro/nanostructures and thin films of lamellar molybdenum oxide by solid-state pyrolysis of organometallic derivatives of a cyclotriphosphazene

“…the signal corresponding to the C 6 H 4 and CH 2 groups were observed as expected (see Experimental section). The total coordination of the Mo(CO) 5 or Mo(CO) 4 Py fragments in the six sites of the phosphazene ring is clearly established by the solitary signal in the 31 P NMR spectra of both (I) and (II) [22c] .…”

“…Subsequent pyrolysis was conducted at 800 °C. Surprisingly few AFM studies of MoO 3 have been reported in the literature [4,16] in Fig. 4d and precursor (II) in Fig.…”

“…Of these, MoO 3 is an extremely versatile material from many standpoints [1] . This material exhibits useful properties that have already been applied to sensing, electrochromic coating materials, layered host materials for solid-state thin film battery cathodes, [2,3] solid-state lubricants [4] exhibiting loadindependent friction [5] , and even superconductivity [6] and thermoelectrics [7] . A recent review [8] has poignantly highlighted the importance of micro-and nanostructured MoO 3 and related substoichiometric molybdenum oxides for charge storage/intercalation and particularly for electrochromics, which has been studied for a wide range of disordered partially crystalline or polycrystalline materials including amorphous MoO 3 films.…”

Superlubricity of Graphene/C60/Graphene Interface - Experiment and Simulation

“…It is the ultimate goal of tribology researchers to realize an ideal friction-free machinery system with zero energy consumption. Since the first observation of the atomic-scale friction [1] and the proposal of the concept of an ideal frictionless sliding [2], fundamental studies on superlubricity have been carried out to date based on mainly two different mechanisms, incommensurate contact [3][4][5][6][7][8][9][10][11][12][13][14][15][16] and weak interfacial interaction [17][18][19][20][21]. Control of the superlubricity leads to the energetically effective control of the motion of nano-or micro-scale objects at the interface.…”

“…As efficient solid lubricants, lamellar solids, such as graphite, MoS 2 , and boron nitride, are widely used because flakes cleaved from these substrates can contribute to the superlubricity due to the incommensurate stacking of the lattice between the flakes and the substrate surface, such as that between mica flakes on a mica surface [3], MoS 2 flakes on a MoS 2 surface [5,6], MoO 3 nanocrystals on a MoS 2 surface [7], MoS 2 /MoO 3 /MoS 2 interface [8], and graphite flakes on a graphite surface [9,10].…”