Effect of Lubricants on the Rotational Transmission between Solid-State Gears

TL;DR

This study uses molecular dynamics simulations to explore how lubricants affect rotational transmission between nanoscale diamond gears, revealing that lubricants improve synchronization regardless of molecular species and distance, with angular velocity influencing bond formation.

Contribution

First detailed molecular dynamics analysis of lubricant effects on nanoscale solid-state gear transmission, highlighting lubricant role in synchronization and bond dynamics.

Findings

Lubricants enhance rotational synchronization between nanoscale gears.

The molecular species of lubricants do not significantly affect transmission.

Angular velocity impacts bond formation between gears.

Abstract

Lubricants are widely used in macroscopic mechanical systems to reduce friction and wear. However, on the microscopic scale, it is not clear to what extent lubricants are beneficial. Therefore, in this study, we consider two diamond solid-state gears at the nanoscale immersed in different lubricant molecules and perform classical MD simulations to investigate the rotational transmission of motion. We find that lubricants can help to synchronize the rotational transmission between gears regardless of the molecular species and the center-of-mass distance. Moreover, the influence of the angular velocity of the driving gear is investigated and shown to be related to the bond formation process between gears.