Journal
SMALL
Volume 12, Issue 42, Pages 5882-5890Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201602039
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Funding
- European Union (ERDF)
- Free State of Saxony via the ESF project InnoMedTec
- DFG cluster for Excellence
- Center for Advancing Electronics Dresden (CfAED)
- European Research Council under the European Union [306277]
- Odysseus Program of the Flemish Government
- FWO-VI
- RIKEN iTHES Project
- MURI Center for Dynamic Magneto-Optics via the AFOSR Grant [FA9550-14-1-0040]
- IMPACT program of the JST
- Grants-in-Aid for Scientific Research [15H02118] Funding Source: KAKEN
- European Research Council (ERC) [306277] Funding Source: European Research Council (ERC)
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Self-propelled Janus particles, acting as microscopic vehicles, have the potential to perform complex tasks on a microscopic scale, suitable, e.g., for environmental applications, on-chip chemical information processing, or in vivo drug delivery. Development of these smart nanodevices requires a better understanding of how synthetic swimmers move in crowded and confined environments that mimic actual biosystems, e.g., network of blood vessels. Here, the dynamics of self-propelled Janus particles interacting with catalytically passive silica beads in a narrow channel is studied both experimentally and through numerical simulations. Upon varying the area density of the silica beads and the width of the channel, active transport reveals a number of intriguing properties, which range from distinct bulk and boundary-free diffusivity at low densities, to directional locking and channel unclogging at higher densities, whereby a Janus swimmer is capable of transporting large clusters of passive particles.
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