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The remarkable properties of two-dimensional materials have generated great enthusiasm among researchers. Very recently, MoS2, the representative of transition metal dichalcogenides, has triggered increasing attention and hold huge potential for many applications. Although the tribological properties of MoS2 has been studied for decades, the atomic-scale motion between tip and MoS2 surface is quite...
An theoretical and experimental study on friction anisotropy and 120 degree periodicity variation in atomic friction of MoS2 is presented in this paper. To clearly clarify these properties, fast Fourier transform(FFT) is utilized by Matlab software to perform the frequency variation of the actual friction signal wave acquired from the lateral friction experiment. Characteristic of the computed frequency...
A friction modeling in zigzag and armchair lattice orientation of MoS2 has been demonstrated in this paper. Combing the assumption on the moving trajectories of the probe in both lattice orientations with two-dimension Tomlinson model, simulation of relationship between friction and orientation was smoothly performed with Matlab software. The lateral friction Microscopy(LFM) based experiment was conducted...
The transport properties of zigzag graphene nanoribbons (ZGNRs) with different patterns of vacancies are investigated by using density functional theory and nonequilibrium Green's function (NEGF) formalism. It is found that the transport properties are different with a different lattice type vacancy (A-type or B-type vacancy). The conductance of ZGNRs is more sensitive to an interior vacancy than...
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