TY - GEN
T1 - Self-magnetization-switchable micro-magnetic-Track based magnetic-bead manipulation
AU - Chung, Tien-Kan
AU - Fang, Lin Huei
AU - Liu, Tzu Wei
AU - Chu, Hou Jen
AU - Ranabotu, Jaganmohan Reddy
AU - Chen, Chin Chung
PY - 2018/12/3
Y1 - 2018/12/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85060275680&partnerID=8YFLogxK
U2 - 10.1109/NEMS.2018.8556910
DO - 10.1109/NEMS.2018.8556910
M3 - Conference contribution
AN - SCOPUS:85060275680
T3 - NEMS 2018 - 13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems
SP - 275
EP - 279
BT - NEMS 2018 - 13th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 22 April 2018 through 26 April 2018
ER -