Out-of-plane and in-plane actuation effects on atomic-scale friction

Fajardo, O. Y.; Gnecco, Enrico; Mazo, J. J.

doi:10.1103/physrevb.89.075423

Cited by 19 publications

(20 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, they showed that the friction force can be resonantly reduced by superimposing torsional oscillation on a cantilever for a low scan velocity. Another aspect of this study has been recently investigated [9,10], and an analytical formula of friction as a function of the excitation amplitude is also introduced at zero temperature.…”

Section: Introductionmentioning

confidence: 99%

Velocity and forced excitation effects on atomic friction force with deformable substrate

Tchaptchet

Kenmoé

2015

Nonlinear Dyn

View full text Add to dashboard Cite

We have investigated the effect of scan velocity on atomic friction force in a Prandtl-Tomlinson model at finite temperature. We use a nonsinusoidal substrate potential with variable shape to capture surface features. The velocity dependence of atomic friction force is classified into two regimes: thermal and athermal regimes. We numerically find turning velocity between these two regimes, and its shape parameter dependence is determined. Furthermore, we have studied the torsional oscillation effect on a cantilever. We show that friction force can be reduced by controlling the frequency and the amplitude of the superimposed torsional oscillation at low scan velocity. The numerical calculations have shown that the substrate shape strongly affects the occurrence of resonances, so the torsional resonance frequency dependence of the shape parameter is established.

show abstract

Section: Introductionmentioning

confidence: 99%

Velocity and forced excitation effects on atomic friction force with deformable substrate

Tchaptchet

Kenmoé

2015

Nonlinear Dyn

View full text Add to dashboard Cite

show abstract

“…At the macro scale, gears and bearings and liquid lubricants can reduce friction, but these methods may fail at the micro-or nanoscale [5]. Ultrasonic excitation has been proven to reduce friction at the macroscale [6][7][8][9][10] and the nanoscale [5,[11][12][13][14][15][16][17][18][19][20]. However, the studies on the ultrasonic vibration at the nanoscale are still insufficient [6].…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of lateral ultrasonic excitation in atomic-scale friction

Wang

Duan

Dong

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

The normal and lateral (in the sliding direction) vibration can achieve 'dynamic superlubricity' at the atomic scale which has been studied and proved by other researchers. In this study, we have found that the lateral excitation (perpendicular to the sliding direction) which has rarely been studied before can also reduce the average friction force greatly. By utilizing the tip path on the interaction potential energy surface and plotting the interaction potential energy as a function of support position, we elucidated the reason of dynamic superlubricity caused by lateral excitation. The details of the lateral excitation at the atomic scale friction have been demonstrated by molecular dynamics simulations and numerical computation based on the Prandtl-Tomlinson model. This study can increase the understanding of the ultrasonic vibration excitation at atomic scale friction.

show abstract

“…Under frequencies of 319 MHz, 285 Hz, and 250 Hz, friction forces of the diamond tip reach the lowest. Fajardo [20] pointed out that, when vs/a ≤ f ≤ fp/ϒ , friction decreases under external vibration, where f is the vibration frequency, vs is the support velocity, a is the spatial periodicity, and fp is the resonance frequency. ϒ = γ/(2πfp), where γ is a microscopic friction coefficient describing the coupling with the phonon and the possible electron oscillations in the substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Guo et al [19] discussed the control of vibration to reduce friction based on a 1D model imitating the friction force microscope (FFM) tip moving on a substrate. Fajardo et al [20] indicated that, under out-of-plane and in-plane contact vibrations, average friction forces were both significantly lowered in a frequency range determined by the "washboard" frequency of the stick-slip motion and the viscous damping accompanying the tip motion. However, Roth et al [21] studied the influence of lateral vibrations on the stick-slip motion by atomic force microscopy (AFM) measurements on an NaCl (001) surface.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Vertical Vibration on Nanoscale Friction: A Molecular Dynamics Simulation Study

Yang

Zhu

2018

Crystals

View full text Add to dashboard Cite

Abstract:The influence of vibration on friction at the nanoscale was studied via molecular dynamics (MD) simulations. The results show that average friction increases in a high-frequency range. This can be attributed to the vibration of the tip following vibration excitation, which results in peaks of repulsive interaction between tip and substrate and leads to higher friction. However, when the frequency is lower than a certain value, friction decreases. This is because vibration excitation results not in an obvious vibration of the tip but in a slightly larger interface distance, which leads to a decrease in friction.

show abstract

Out-of-plane and in-plane actuation effects on atomic-scale friction

Cited by 19 publications

References 41 publications

Velocity and forced excitation effects on atomic friction force with deformable substrate

Velocity and forced excitation effects on atomic friction force with deformable substrate

Molecular dynamics simulation of lateral ultrasonic excitation in atomic-scale friction

The Influence of Vertical Vibration on Nanoscale Friction: A Molecular Dynamics Simulation Study

Contact Info

Product

Resources

About