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Amplitude nanofriction spectroscopy.

Antoine Lainé¹, Andrea Vanossi, Antoine Niguès

¹Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité, UMR CNRS 8550, 24 Rue Lhomond, 75005 Paris, France. antoine.laine@phys.ens.fr.

|January 14, 2021

Summary

This summary is machine-generated.

This study reveals atomic scale friction dynamics by applying increasing shear stress, capturing static pinning to kinetic friction. This method provides insights into time and magnitude dependent rheology for nanotechnology applications.

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Area of Science:

Nanotechnology
Tribology
Materials Science

Background:

Atomic scale friction is crucial for nanotechnology.
Standard methods often miss early friction phases like static pinning and transient evolution.
Understanding these phases is key to controlling nanoscale interactions.

Purpose of the Study:

To develop a method for observing all successive phases of atomic scale friction.
To investigate phenomena bridging initial depinning and high-speed sliding.
To explore time and magnitude dependent rheology at the atomic scale.

Main Methods:

An experimental and simulation approach using oscillatory shear force of increasing amplitude.
A one-shot investigation technique to capture multiple friction phases.
Controlled gold nanocontacts sliding on graphite.

Main Results:

Successfully captured all successive phases of atomic scale friction, from static pinning to steady state kinetic friction.
Uncovered phenomena occurring between initial depinning and large speed sliding.
Demonstrated a novel approach for studying friction dynamics.

Conclusions:

The developed method provides unprecedented access to the full spectrum of atomic scale friction dynamics.
Findings are relevant for understanding and controlling nanoscale rheology.
This work advances the study of friction in nanotechnology.