Simultaneous polydirectional transport of colloidal bipeds.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
16 Sep 2020
16 Sep 2020
Historique:
received:
09
04
2020
accepted:
25
08
2020
entrez:
17
9
2020
pubmed:
18
9
2020
medline:
18
9
2020
Statut:
epublish
Résumé
Detailed control over the motion of colloidal particles is relevant in many applications in colloidal science such as lab-on-a-chip devices. Here, we use an external magnetic field to assemble paramagnetic colloidal spheres into colloidal rods of several lengths. The rods reside above a square magnetic pattern and are transported via modulation of the direction of the external magnetic field. The rods behave like bipeds walking above the pattern. Depending on their length, the bipeds perform topologically distinct classes of protected walks. We design parallel polydirectional modulation loops of the external field that command up to six classes of bipeds to walk on distinct predesigned paths. Using such loops, we induce the collision of reactant bipeds, their polymerization addition reaction to larger bipeds, the separation of product bipeds from the educts, the sorting of different product bipeds, and also the parallel writing of a word consisting of several letters. Our ideas and methodology might be transferred to other systems for which topological protection is at work.
Identifiants
pubmed: 32938912
doi: 10.1038/s41467-020-18467-9
pii: 10.1038/s41467-020-18467-9
pmc: PMC7495478
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4670Subventions
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : 440764520
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