On-chip diamagnetic repulsion in continuous flow

Tarn, Mark D.; Hirota, Noriyuki; Iles, Alexander; Pamme, Nicole

Abstract

We explore the potential of a microfluidic continuous flow particle separation system based on the repulsion of diamagnetic materials from a high magnetic field. Diamagnetic polystyrene particles in paramagnetic manganese (II) chloride solution were pumped into a microfluidic chamber and their deflection behaviour in a high magnetic field applied by a superconducting magnet was investigated. Two particle sizes (5 and 10 mu m) were examined in two concentrations of MnCl2 (6 and 10%). The larger particles were repelled to a greater extent than the smaller ones, and the effect was greatly enhanced when the particles were suspended in a higher concentration of MnCl2. These findings indicate that the system could be viable for the separation of materials of differing size and/or diamagnetic susceptibility, and as such could be suitable for the separation and sorting of small biological species for subsequent studies.

Citation

Tarn, M. D., Hirota, N., Iles, A., & Pamme, N. (2009). On-chip diamagnetic repulsion in continuous flow. Science and Technology of Advanced Materials, 10(1), 014611 - 014611. https://doi.org/10.1088/1468-6996/10/1/014611

• Journal Article Type: Article
• Acceptance Date: May 22, 2009
• Online Publication Date: Jan 12, 2016
• Publication Date: May 22, 2009
• Journal: SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
• Print ISSN: 1468-6996
• Publisher: National Institute for Materials Science
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 1
• Pages: 014611 - 014611
• DOI: https://doi.org/10.1088/1468-6996/10/1/014611
• Public URL: https://hull-repository.worktribe.com/output/391402