Volume 110, Number 5, June 2015
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||23 June 2015|
Janus droplet as a catalytic micromotor
Institute of Continuous Media Mechanics, Ural Branch of the Russian Academy of Sciences Perm 614013, Russia
Received: 27 January 2015
Accepted: 1 June 2015
Self-propulsion of a Janus droplet in a solution of surfactant, which reacts on a half of a drop surface, is studied theoretically. The droplet acts as a catalytic motor creating a concentration gradient, which generates its surface-tension–driven motion; the self-propulsion speed is rather high, and more. This catalytic motor has several advantages over other micromotors: simple manufacturing, easily attained neutral buoyancy. In contrast to a single-fluid droplet, which demonstrates a self-propulsion as a result of symmetry breaking instability, for the Janus one no stability threshold exists; hence, the droplet radius can be scaled down to micrometers.
PACS: 47.55.pf – Marangoni convection / 47.55.D- – Drops and bubbles / 47.15.G- – Low-Reynolds-number (creeping) flows
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.