title: Optically driven Archimedes micro-screws for micropump application.
abstract: Archimedes micro-screws have been fabricated by three-dimensional two-photon polymerization using a Nd:YAG Q-switched microchip laser at 532nm. Due to their small sizes they can be easily manipulated, and made to rotate using low power optical tweezers. Rotation rates up to 40 Hz are obtained with a laser power of 200 mW, i.e. 0.2 Hz/mW. A photo-driven micropump action in a microfluidic channel is demonstrated with a non-optimized flow rate of 6 pL/min. The optofluidic properties of such type of Archimedes micro-screws are quantitatively described by the conservation of momentum that occurs when the laser photons are reflected on the helical micro-screw surface.
authors.affiliation: Institute of Biomedical Engineering and Material, Central Taiwan University of Science and Technology, Taichung, Taiwan. cllin101943@ctust.edu.tw
authors.forename: Chih-Lang
authors.initials: CL
authors.lastname: Lin
authors.forename: Guy
authors.initials: G
authors.lastname: Vitrant
authors.forename: Michel
authors.initials: M
authors.lastname: Bouriau
authors.forename: Roger
authors.initials: R
authors.lastname: Casalegno
authors.forename: Patrice L
authors.initials: PL
authors.lastname: Baldeck
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D052898:Optical Tweezers; D018511:Systems Integration