Skip to Main content Skip to Navigation
Theses

Filaments magnétiques : application à la conception de capteurs de forces et de nageurs microscopiques artificiels

Abstract : The manuscript is devoted to two applications of chains of magnetic particles.
The first chapter reports the design of force sensors between colloids. Various experiments are designed and performed to characterise the particles under investigation. Our experimental setup and signal processing techniques are described in detail. Finally, we compare this technique to previous ones.
The second chapter describes the design and fabrication of the first microscopic artificial swimmers. Flexible magnetic filaments are created by aligning magnetic particles under a magnetic field and gluing them together by means of DNA strands. Their behaviour under a magnetic field is investigated. Subjected to an oscillating magnetic field, the filaments experience deformations so that a wave propagates along them, thereby generating a propulsive force, which we demonstrate through the motion of a spermatomorphic swimmer. Theoretical and numerical predictions are validated experimentally.
Complete list of metadatas

Cited literature [94 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-00011193
Contributor : Rémi Dreyfus <>
Submitted on : Wednesday, January 4, 2006 - 11:00:40 AM
Last modification on : Saturday, September 26, 2020 - 11:44:06 PM
Long-term archiving on: : Saturday, April 3, 2010 - 6:57:12 PM

Identifiers

  • HAL Id : tel-00011193, version 1

Citation

Rémi Dreyfus. Filaments magnétiques : application à la conception de capteurs de forces et de nageurs microscopiques artificiels. Dynamique des Fluides [physics.flu-dyn]. Université Pierre et Marie Curie - Paris VI, 2005. Français. ⟨tel-00011193⟩

Share

Metrics

Record views

481

Files downloads

928