2026-04-13T04:07:28Zhttps://recercat.cat/oai/request
oai:recercat.cat:2445/1488422025-12-04T20:48:43Zcom_2072_1057col_2072_478822col_2072_478917
RECERCAT author Li, Menglin author Brinkmann, Martin author Pagonabarraga Mora, Ignacio author Seeman, Ralf author Fleury, Jean-Baptiste 2020-01-28T13:52:07Z2020-01-28T13:52:07Z2018-03-032020-01-28T13:52:08Z 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. cc-by (c) Li, Menglin et al., 2018 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess Transport biològic Molècules Microfluídica Física de partícules Biological transport Molecules Microfluidics Particle physics Spatiotemporal control of cargo delivery performed by programmable self-propelled Janus droplets info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion