Transmission of torque at the nanoscale

Abstract

In macroscopic mechanical devices torque is transmitted through gearwheels and clutches. In the construction of devices at the nanoscale, torque and its transmission through soft materials will be a key component. However, this regime is dominated by thermal fluctuations leading to dissipation. Here we demonstrate the principle of torque transmission for a disc-like colloidal assembly exhibiting clutch-like behaviour, driven by $27$ particles in optical traps. These are translated on a circular path to form a rotating boundary that transmits torque to additional particles confined to the interior. We investigate this transmission and find that it is determined by solid-like or fluid-like behaviour of the device and a stick-slip mechanism reminiscent of macroscopic gearwheels slipping. The transmission behaviour is predominantly governed by the rotation rate of the boundary and the density of the confined system. We determine the efficiency of our device and thus optimise conditions to maximise power output.

arXiv comment12 pages

References in corpus (9)

• Stochastic thermodynamics, fluctuation theorems, and molecular machines
• A bacterial ratchet motor
• Energy Transduction of Isothermal Ratchets: Generic Aspects and Specific Examples Close to and Far from Equilibrium
• Dynamic Relaxation of a Levitated Nanoparticle from a Non-Equilibrium Steady State
• Efficiency of autonomous soft nano-machines at maximum power
• Dynamics and efficiency of a self-propelled, diffusiophoretic swimmer
• Replica theory of the rigidity of structural glasses
• The effect of boundary adaptivity on hexagonal ordering and bistability in circularly confined quasi hard discs
• Influence of rotational force fields on the determination of the work done on a driven Brownian particle

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