Transition from Stick-Slip to Continuous Sliding in Atomic Friction: Entering a New Regime of Ultralow Friction

Socoliuc, Anisoara; Bennewitz, Roland; Gnecco, Enrico; Meyer, Ernst

doi:10.1103/physrevlett.92.134301

Cited by 536 publications

(536 citation statements)

References 12 publications

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“…In theory, this amplitude can be changed by varying the normal load 10,16 although it is worth noting that a change in the normal load is probably changing other parameters of the system in a nontrivial way. The effect of this disorder is a small change in the potential shape ͑see Fig.…”

Section: Dmentioning

confidence: 99%

Effects of surface disorder and temperature on atomic friction

Fajardo

Mazo

2010

Phys. Rev. B

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We have investigated the effect of surface disorder on atomic friction in the stick-slip dynamical regime of a one-dimensional Prandtl-Tomlinson model. We find that disorder in the substrate potential can modify the mean slip length and then it changes the friction force of the system. In particular, the effect of the disorder is more important at low temperatures and close to dynamical transition points or at high loads. We show results for different values of temperature, amplitude of the corrugation potential, dragging velocity, and damping. Special care is put in the comparison between the results of the regular and the disordered cases at many different temperatures and in the understanding of the combined effect of disorder and temperature in the dynamics of the system. To finish, we present some results on the robustness of the results against a change in the effective damping of the system.

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Section: Dmentioning

confidence: 99%

Effects of surface disorder and temperature on atomic friction

Fajardo

Mazo

2010

Phys. Rev. B

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“…Whereas rate and state models have been used to describe the freeze-melting transition cycles in the case of lubricated systems studied with the surface force apparatus (SFA). 29 The Prandtl-Tomlinson model is frequently used to describe stick-slip motion 30,31 which is particularly relevant to AFM measurements. In this simple model, the AFM tip,…”

mentioning

confidence: 99%

“…32,33 It is also able to describe many useful properties of dry friction, for instance the in uence of system parameters such as sti ness as well as the potential amplitude and periodicity on the transition between stick-slip and continuous friction regimes. 31 The use of an interaction potential, however, implies that important information regarding both the properties of the tip (e.g. material properties, radius of curvature) and the contact surfaces ( e.g.…”

mentioning

confidence: 99%

Sustained Frictional Instabilities on Nanodomed Surfaces: Stick–Slip Amplitude Coefficient

et al. 2013

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Understanding the frictional properties of nanostructured surfaces is important due to their increasing application in modern miniaturised devices. In this work, lateral force microscopy was used to study the frictional properties between an AFM nanotip and surfaces bearing well-de ned nanodomes comprising densely packed prolate spheroids, of diameters ranging from tens to hundreds of nanometres. Our results show that the average lateral force varied linearly with applied load, as described by Amontons' rst law of friction, although no direct correlation between the sample topographic * To whom correspondence should be addressed † 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 properties and their measured friction coe cients was identi ed. Furthermore, all the nanodomed textures exhibited pronounced oscillations in the shear traces, similar to the classic stick-slip behaviour, under all the shear velocities and load regimes studied. School of Chemistry, University of BristolThat is, the nanotextured topography led to sustained frictional instabilities, e ectively with no contact frictional sliding. The amplitude of the stick-slip oscillations, σ f , was found to correlate with the topographic properties of the surfaces, and scale linearly with the applied load. In line with the friction coe cient, we de ne the slope of this linear plot as the stick-slip amplitude coe cient (SSAC ). We suggest that such stick-slip behaviours are characteristics of surfaces with nanotextures, and that such local frictional instabilities have important implications to surface damage and wear.We thus propose that the shear characteristics of the nanodomed surfaces can not be fully described by the framework of Amontons' laws of friction, and that additional parameters (e.g. σ f and SSAC) are required, when their friction, lubrication and wear properties are important considerations in related nanodevices.

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“…We would like to point out that researchers working on different size scales observed a decrease of the COF of graphite as a consequence of dynamic instabilities [15,28,29]. This is probably because they observed the same phenomena that was already studied by Oden and coworkers [30,31], who found that the well-known reduction in the COF with an increase in sliding speed is a consequence of the dynamic instability of stick-slip phenomena on the atomic scale.…”

Section: Introductionmentioning

confidence: 68%

“…By measuring the atomic-scale friction as a function of the rotation angle of a graphite mono-crystal they found a region of COF decrease of more than one order of magnitude. Further experimental work on the topic of superlubricity [29] revealed that the reason for the ultra-low friction could be the transition from stick-slip phenomena (with the periodicity of the graphite hexagonal crystal lattice) to continuous sliding.…”

Section: Introductionmentioning

confidence: 99%

Measuring the dynamic forces to identify the friction of a graphite–copper contact for variable temperature and current

Slavič

Boltežar

2006

Wear

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In this paper we present experimental and analytical techniques for identifying the coefficient of friction (COF) of a graphite electric brush sliding against a commutator for different contact temperatures and electric current densities. A direct measurement of the instantaneous dynamic forces is used to identify the coefficient of friction. The experimental example shows that the presented procedures can be used to determine the optimum operating ranges for the temperature and the electric current density.

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Transition from Stick-Slip to Continuous Sliding in Atomic Friction: Entering a New Regime of Ultralow Friction

Cited by 536 publications

References 12 publications

Effects of surface disorder and temperature on atomic friction

Effects of surface disorder and temperature on atomic friction

Sustained Frictional Instabilities on Nanodomed Surfaces: Stick–Slip Amplitude Coefficient

Measuring the dynamic forces to identify the friction of a graphite–copper contact for variable temperature and current

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