title: Note: On-chip multifunctional fluorescent-magnetic Janus helical microswimmers.
abstract: Microswimmers integrated into microfluidic devices that are capable of self-illumination through fluorescence could revolutionize many aspects of technology, especially for biological applications. Few illumination and propulsion techniques of helical microswimmers inside microfluidic channels have been demonstrated. This paper presents the fabrication, detachment, and magnetic propulsions of multifunctional fluorescent-magnetic helical microswimmers integrated inside microfluidics. The fabrication process is based on two-photon laser lithography to pattern 3-D nanostructures from fluorescent photoresist coupled with conventional microfabrication techniques for magnetic thin film deposition by shadowing. After direct integration inside a microfluidic device, injected gas bubble allows gentle detachment of the integrated helical microswimmers whose magnetic propulsion can then be directly applied inside the microfluidic channel using external electromagnetic coil setup. With their small scale, fluorescence, excellent resistance to liquid/gas surface tension, and robust propulsion capability inside the microfluidic channel, the microswimmers can be used as high-resolution and large-range mobile micromanipulators inside microfluidic channels.
authors.affiliation: Laboratoire de Photonique et de Nanostructures, CNRS, Route de Nozay, Marcoussis 91460, France.
authors.forename: G
authors.initials: G
authors.lastname: Hwang
authors.affiliation: Laboratoire de Photonique et de Nanostructures, CNRS, Route de Nozay, Marcoussis 91460, France.
authors.forename: D
authors.initials: D
authors.lastname: Decanini
authors.affiliation: Laboratoire de Photonique et de Nanostructures, CNRS, Route de Nozay, Marcoussis 91460, France.
authors.forename: L
authors.initials: L
authors.lastname: Leroy
authors.affiliation: Laboratoire de Photonique et de Nanostructures, CNRS, Route de Nozay, Marcoussis 91460, France.
authors.forename: A M
authors.initials: AM
authors.lastname: Haghiri-Gosnet
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry; D056656:Lab-On-A-Chip Devices; D059346:Magnets / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes