Jump to main content
Jump to site search

Issue 9, 2012
Previous Article Next Article

Remotely addressable magnetic composite micropumps

Author affiliations

Abstract

Remotely and selectively turning on and off the magnetization of many micro-scale magnetic actuators could be a great enabling feature in fields such as microrobotics and microfluidics. We present an array of addressable 800 × 800 × 75 μm3 micropumps made from a composite material whose net magnetic moment can be selectively turned on or off by application of a large magnetic field pulse. The material is made from a mixture of micron-scale neodymium-iron-boron and ferrite particles, and can be formed into arbitrary actuator shapes using a simple molding procedure. By selectively controlling the orientation of each of an array of micro-actuators prior to the application of the field pulse, the magnetic on/off state of each can be controlled independently. The micropumps are actuated by rotating magnetic fields up to 12 kA m−1 in strength to pump liquid through 100 μm fluid channels. A distinct transition between the on and off states is seen by application of pulsed magnetic fields of about 240 kA m−1 in strength. As a demonstration, we show addressable on/off control of two micropumps and five simple spinning magnetic microactuators, with potential applications for lab-on-a-chip type fluidic devices.

Graphical abstract: Remotely addressable magnetic composite micropumps

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 19 Dec 2011, accepted on 14 Feb 2012, published on 15 Feb 2012 and first published online on 15 Feb 2012


Article type: Paper
DOI: 10.1039/C2RA01318E
Citation: RSC Adv., 2012,2, 3850-3856
  •   Request permissions

    Remotely addressable magnetic composite micropumps

    E. Diller, S. Miyashita and M. Sitti, RSC Adv., 2012, 2, 3850
    DOI: 10.1039/C2RA01318E

Search articles by author