Title: Probe type micro magnetic manipulator utilising localised magnetic field with closed-loop magnetic path
Authors: So Ito; Kenji Ito; Futoshi Iwata
Addresses: Graduate School of Science and Technology, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu, Shizuoka, 432-8561, Japan. ' Graduate School of Science and Technology, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu, Shizuoka, 432-8561, Japan. ' Faculty of Engineering, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu, Shizuoka, 432-5861, Japan
Abstract: This paper describes a novel manipulation technique of a single micrometer-scale magnetic particle using a localised magnetic field. An electromagnetic probe consisting of a glass nanopipette was fabricated by coating with ferromagnetic materials inside and outside the nanopipette. The probe edge coated with the magnetic materials was used as the magnetic poles in order to generate a magnetic field with closed-loop magnetic path around the aperture at the edge of the nanopipette. By using the localised magnetic field at the probe edge, a single magnetic particle with 1 µm in diameter could be selectively trapped in liquid condition, and then the trapped individual particles were arranged on a substrate at interval distance of 2 µm. This technique of micromanipulation would be applicable to various fields such as assembling of micro and nanometre-scale devices and measurement for characteristics of biological samples.
Keywords: micromanipulators; magnetic manipulators; closed-loop magnetic path; electromagnetic probes; magnetic particles; manipulation; ferromagnetic materials; glass nanopipettes; micromanipulation.
International Journal of Nanomanufacturing, 2012 Vol.8 No.1/2, pp.161 - 172
Available online: 01 Jan 2012 *Full-text access for editors Access for subscribers Purchase this article Comment on this article