Self-magnetization-switchable micro-magnetic-Track based magnetic-bead manipulation

Tien-Kan Chung*, Lin Huei Fang, Tzu Wei Liu, Hou Jen Chu, Jaganmohan Reddy Ranabotu, Chin Chung Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this paper, we report a self-magnetization-switchable magnetic-Track based magnetic-bead manipulation on a silicon wafer. The manipulation approach consists of a thermomagnetic NiCu micro-disc track (which is deposited on the silicon wafer), micro magnetic bead, a thermoelectric generator (TEG; which is placed beneath the silicon wafer), and four external electromagnets (which are used to produce a directional magnetic field). The Curie temperature of the NiCu micro-disc track is approximate room temperature. Due to this, when the TEG cools the NiCu micro-disc track lower than its Curie temperature (i.e., lower than room temperature), the track becomes ferromagnetic. However, when the TEG heats the NiCu micro-disc track higher than its Curie temperature (i.e., about or higher than room temperature), the track becomes paramagnetic. Therefore, by alternative cooling and heating, the track is switched between ferromagnetic and paramagnetic (i.e., magnetic moment is changed between normal and very small). This achieves on-chip self-magnetization-switchable track. Furthermore, when a directional magnetic field is applied to the track which becomes ferromagnetic, the track can guide the bead manipulation. Alternatively, when the track becomes paramagnetic, the track cannot guide the bead manipulation. This novel self-magnetization-switch able magnetic-Track-guided bead-manipulation provides an important alternative bead-manipulation for biomedical MEMS/NEMS systems.

Original languageEnglish
Title of host publicationNEMS 2018 - 13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages275-279
Number of pages5
ISBN (Electronic)9781538652732
DOIs
StatePublished - 3 Dec 2018
Event13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2018 - Singapore, Singapore
Duration: 22 Apr 201826 Apr 2018

Publication series

NameNEMS 2018 - 13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems

Conference

Conference13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2018
CountrySingapore
CitySingapore
Period22/04/1826/04/18

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