Title: Self-propelling micro-disks
Authors: Reddy, Naveen Krishna
Clasen, Christian # ×
Issue Date: Feb-2014
Publisher: Han-gug yubyeon haghoe
Series Title: Korea-australia Rheology Journal vol:26 issue:1 pages:73-79
Abstract: In this paper we introduce a simple and scalable method to produce micrometer sized ‘Janus’ disks whose rim is coated half with platinum/palladium and half with gold. The disks pinned upright to the air/liquid interface disks exhibit self-propulsion of ∼100 µm/s when submerged in H2O2 solution, due to the catalytic growth of oxygen bubbles at the disks upper (platinum/palladium-coated) rim. The disks exhibit two different travel trajectories, linear and rotary, depending on the bubble growth position, and are propelled via two different mechanisms, the bubble growth and the bubble burst. The displacement speed due to the bubble burst is three orders of magnitude larger than from the bubble growth process, whereas displacement distances are of similar order of magnitude for both processes.
ISSN: 1226-119X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter, Rheology and Technology Section
× corresponding author
# (joint) last author

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