Details

Autor(en) / Beteiligte

• Manna, Raj Kumar
• Kumar, P. B. Sunil
• Adhikari, R.

Titel

Colloidal transport by active filaments

Ist Teil von

• The Journal of chemical physics, 2017-01, Vol.146 (2), p.024901-024901

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2017

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• Enhanced colloidal transport beyond the limit imposed by diffusion is usually achieved through external fields. Here, we demonstrate the ballistic transport of a colloidal sphere using internal sources of energy provided by an attached active filament. The latter is modeled as a chain of chemo-mechanically active beads connected by potentials that enforce semi-flexibility and self-avoidance. The fluid flow produced by the active beads and the forces they mediate are explicitly taken into account in the overdamped equations of motion describing the colloid-filament assembly. The speed and efficiency of transport depend on the dynamical conformational states of the filament. We characterize these states using filament writhe as an order parameter and identify ones yielding maxima in speed and efficiency of transport. The transport mechanism reported here has a remarkable resemblance to the flagellar propulsion of microorganisms which suggests its utility in biomimetic systems.