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http://dx.doi.org/10.18419/opus-13127
Autor(en): | Sachs, Johannes Kottapalli, S. Nikhilesh Fischer, Peer Botin, Denis Palberg, Thomas |
Titel: | Characterization of active matter in dense suspensions with heterodyne laser Doppler velocimetry |
Erscheinungsdatum: | 2020 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 269-280 |
Erschienen in: | Colloid and polymer science 299 (2021), S. 269-280 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-131467 http://elib.uni-stuttgart.de/handle/11682/13146 http://dx.doi.org/10.18419/opus-13127 |
ISSN: | 0303-402X 1435-1536 |
Zusammenfassung: | We present a novel approach for characterizing the properties and performance of active matter in dilute suspension as well as in crowded environments. We use Super-Heterodyne Laser-Doppler-Velocimetry (SH-LDV) to study large ensembles of catalytically active Janus particles moving under UV illumination. SH-LDV facilitates a model-free determination of the swimming speed and direction, with excellent ensemble averaging. In addition, we obtain information on the distribution of the catalytic activity. Moreover, SH-LDV operates away from walls and permits a facile correction for multiple scattering contributions. It thus allows for studies of concentrated suspensions of swimmers or of systems where swimmers propel actively in an environment crowded by passive particles. We demonstrate the versatility and the scope of the method with a few selected examples. We anticipate that SH-LDV complements established methods and paves the way for systematic measurements at previously inaccessible boundary conditions. |
Enthalten in den Sammlungen: | 03 Fakultät Chemie |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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s00396-020-04693-6.pdf | 2,17 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons