Dynamic friction energy dissipation and enhanced contrast in high frequency bimodal atomic force microscopy

Tan, Xinfeng; Guo, Dan; Luo, Jianbin

doi:10.1007/s40544-021-0489-1

Cited by 10 publications

(7 citation statements)

References 60 publications

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“…The maximum energy barrier of 1T′-MoTe 2 is 53.80 meV, which is more than twice as large as that of 2H-MoTe 2 (22.20 meV). Therefore, in a random sliding process, the maxmium potential barrier that 2H-MoTe 2 needed to overcome was smaller than that of 1T′-MoTe 2 , implying less energy dissipation and smaller friction force [36]. For the case of a specific friction path, the process of sliding along the minimum energy path (MEP) was analyzed.…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

et al. 2023

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Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have layered structures with excellent tribological properties. Since the energy difference between hexagonal-molybdenum ditelluride (2H-MoTe2) and distorted octahedral-molybdenum ditelluride (1T’-MoTe2) is very small among the transition metal dichalcogenides (TMDCs), MoTe2 becomes one of the most promising candidates for phase engineering. In our experiment, we found that the friction force and friction coefficient (COF) of 2H-MoTe2 were an order of magnitude smaller than those of 1T’-MoTe2 by the atomic force microscope (AFM) experiments. The friction difference between 1T’-MoTe2 and 2H-MoTe2 was further verified in molecular dynamics (MD) simulations. The density functional theory (DFT) calculations suggest that the friction contrast is related to the difference in sliding energy barrier of the potential energy surface (PES) for a tip sliding across the surface. The PES obtained from the DFT calculation indicates that the maximum energy barrier and the minimum energy path (MEP) energy barrier of 2H-MoTe2 are both smaller than those of 1T’-MoTe2, which means that less energy needs to be dissipated during the sliding process. The difference in energy barrier of the PES could be ascribed to its larger interlayer spacing and weaker Mo–Te interatomic interactions within the layers of 2H-MoTe2 than those of 1T’-MoTe2. The obvious friction difference between 1T’-MoTe2 and 2H-MoTe2 not only provides a new non-destructive means to detect the phase transition by the AFM, but also provides a possibility to tune friction by controlling the phase transition, which has the potential to be applied in extreme environments such as space lubrication.

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Section: Discussionmentioning

confidence: 99%

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

et al. 2023

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“…We remark that the bottom-effect corrections are essential to provide accurate quantitative elastic property values of materials, specifically of ultrathin materials. However, many bimodal AFM applications aim to enhance the spatial resolution or material contrast. − Those applications do not require any bottom-effect correction.…”

Section: Resultsmentioning

confidence: 99%

Accurate Wide-Modulus-Range Nanomechanical Mapping of Ultrathin Interfaces with Bimodal Atomic Force Microscopy

Gisbert

García

2021

ACS Nano

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The nanoscale determination of the mechanical properties of interfaces is of paramount relevance in materials science and cell biology. Bimodal atomic force microscopy (AFM) is arguably the most advanced nanoscale method for mapping the elastic modulus of interfaces. Simulations, theory, and experiments have validated bimodal AFM measurements on thick samples (from micrometer to millimeter). However, the bottom-effect artifact, this is, the influence of the rigid support on the determination of the Young’s modulus, questions its accuracy for ultrathin materials and interfaces (1–15 nm). Here we develop a bottom-effect correction method that yields the intrinsic Young’s modulus value of a material independent of its thickness. Experiments and numerical simulations validate the accuracy of the method for a wide range of materials (1 MPa to 100 GPa). Otherwise, the Young’s modulus of an ultrathin material might be overestimated by a 10-fold factor.

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“…In addition, a series of micro-and nanoscale friction experiments have also verified the vibration-based friction phonon dissipation [36][37][38][39][40][41]. Filleter et al [42] found that the friction of monolayer graphene on SiC was larger than that of the bilayer graphene (Fig.…”

Section: Phonon Dissipationmentioning

confidence: 92%

The mechanisms and applications of friction energy dissipation

et al. 2022

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About 30% of the world’s primary energy consumption is in friction. The economic losses caused by friction energy dissipation and wear account for about 2%–7% of its gross domestic product (GDP) for different countries every year. The key to reducing energy consumption is to control the way of energy dissipation in the friction process. However, due to many various factors affecting friction and the lack of efficient detection methods, the energy dissipation mechanism in friction is still a challenging problem. Here, we firstly introduce the classical microscopic mechanism of friction energy dissipation, including phonon dissipation, electron dissipation, and non-contact friction energy dissipation. Then, we attempt to summarize the ultrafast friction energy dissipation and introduce the high-resolution friction energy dissipation detection system, since the origin of friction energy dissipation is essentially related to the ultrafast dynamics of excited electrons and phonons. Finally, the application of friction energy dissipation in representative high-end equipment is discussed, and the potential economic saving is predicted.

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Dynamic friction energy dissipation and enhanced contrast in high frequency bimodal atomic force microscopy

Cited by 10 publications

References 60 publications

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

Accurate Wide-Modulus-Range Nanomechanical Mapping of Ultrathin Interfaces with Bimodal Atomic Force Microscopy

The mechanisms and applications of friction energy dissipation

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