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 optimize conditions to maximize power output. View full text
Original language | English |
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Pages (from-to) | 98-103 |
Number of pages | 6 |
Journal | Nature Physics |
Volume | 12 |
Issue number | 1 |
Early online date | 5 Oct 2015 |
DOIs | |
Publication status | Published - Jan 2016 |
Bibliographical note
[it 0 citations]Keywords
- Colloids, Condensed-matter physics, Statistical physics, thermodynamics and nonlinear dynamics
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Professor Paul Bartlett
- School of Chemistry - Professor of Soft Matter Science
- Soft Matter, Colloids and Materials
Person: Academic , Member