Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/148842
Title: | Spatiotemporal control of cargo delivery performed by programmable self-propelled Janus droplets |
Author: | Li, Menglin Brinkmann, Martin Pagonabarraga Mora, Ignacio Seeman, Ralf Fleury, Jean-Baptiste |
Keywords: | Transport biològic Molècules Microfluídica Física de partícules Biological transport Molecules Microfluidics Particle physics |
Issue Date: | 3-Mar-2018 |
Publisher: | Springer Nature |
Abstract: | Self-propelled droplets capable of transporting cargo to specific target locations are desired tools for many future applications. Here we propose a class of active droplets with programmable delivery time that are attracted or repelled by certain obstacle geometries. These droplets consist of a water/ethanol mixture and are dispersed in an oil/surfactant solution. Owing to a mass exchange between fluid phases during self-propulsion, the initially homogeneous droplets spontaneously de-mix and evolve into characteristic Janus droplets. Cargo molecules, like DNA, can be separated into the trailing ethanol-rich droplet and are carried to their target location 'like in a backpack'. The delayed onset of phase separation provides a handle to control the time frame of delivery, while long-ranged hydrodynamic interactions and short-ranged wetting forces are exploited to achieve the desired spatial specificity with respect to obstacle geometry and surface chemistry. |
Note: | Reproducció del document publicat a: https://doi.org/10.1038/s42005-018-0025-4 |
It is part of: | Communications Physics, 2018, vol. 1, p. 23 |
URI: | http://hdl.handle.net/2445/148842 |
Related resource: | https://doi.org/10.1038/s42005-018-0025-4 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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694650.pdf | 2.21 MB | Adobe PDF | View/Open |
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