# Dynamics of anchored oscillating nanomenisci

## TL;DR

This study investigates the oscillating behavior of nanomenisci on nanometric defects around a nanofiber using FM-AFM, revealing how contact angle influences friction and providing a theoretical model for their dynamics.

## Contribution

It offers a new theoretical model within the lubrification approximation that accurately describes nanomeniscus dynamics and links dissipation patterns to surface and liquid properties.

## Key findings

- Friction coefficient increases as contact angle decreases
- Theoretical model reproduces experimental oscillation data
- Dissipation patterns depend on surface and liquid properties

## Abstract

We present a self-contained study of the dynamics of oscillating nanomenisci anchored on nanometric topographical defects around a cylindrical nanofiber -- radius below 100 nm. Using frequency-modulation atomic force microscopy (FM-AFM), we show that the friction coefficient surges as the contact angle is decreased. We propose a theoretical model within the lubrification approximation that reproduces the experimental data and provides a comprehensive description of the dynamics of the nanomeniscus. The dissipation pattern in the vicinity of the contact line and the anchoring properties are discussed as a function of liquid and surface properties in addition to the sollicitation conditions.