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Actuators 2013, 2(2), 19-26; doi:10.3390/act2020019

Optically Driven Mobile Integrated Micro-Tools for a Lab-on-a-Chip

1 Department of Automatic Control Engineering, Feng Chia University, Taichung 407, Taiwan 2 Ph.D. Program of Electrical and Communications Engineering, Feng Chia University, Taichung 407, Taiwan 3 Institute of Biomedical Engineering and Materials Science, Central Taiwan University of Science and Technology, Taichung 406, Taiwan 4 University Grenoble, I/CNRS, LIPhy UMR 5588, Grenoble, F-38041, France
* Author to whom correspondence should be addressed.
Received: 2 February 2013 / Revised: 18 March 2013 / Accepted: 29 March 2013 / Published: 11 April 2013
(This article belongs to the Special Issue Human Centered Actuators)
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This study proposes an optically driven complex micromachine with an Archimedes microscrew as the mechanical power, a sphere as a coupler, and three knives as the mechanical tools. The micromachine is fabricated by two-photon polymerization and is portably driven by optical tweezers. Because the microscrew can be optically trapped and rotates spontaneously, it provides driving power for the complex micro-tools. In other words, when a laser beam focuses on the micromachine, the microscrew is trapped toward the focus point and simultaneously rotates. A demonstration showed that the integrated micromachines are grasped by the optical tweezers and rotated by the Archimedes screw. The rotation efficiencies of the microrotors with and without knives are 1.9 rpm/mW and 13.5 rpm/mW, respectively. The micromachine can also be portably dragged along planed routes. Such Archimedes screw-based optically driven complex mechanical micro-tools enable rotation similar to moving machines or mixers, which could contribute to applications for a biological microfluidic chip or a lab-on-a-chip.
Keywords: archimedes screw; microrotor; optical tweezers; two-photon polymerization archimedes screw; microrotor; optical tweezers; two-photon polymerization
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Liu, Y.-J.; Lee, Y.-H.; Lin, Y.-S.; Tsou, C.; Baldeck, P.L.; Lin, C.-L. Optically Driven Mobile Integrated Micro-Tools for a Lab-on-a-Chip. Actuators 2013, 2, 19-26.

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