Cited 6 time in webofscience Cited 4 time in scopus

Single Magnetic Bead Detection in a Microfluidic Chip Using Planar Hall Effect Sensor

Title
Single Magnetic Bead Detection in a Microfluidic Chip Using Planar Hall Effect Sensor
Authors
Kim, Hyun TaiReddy, VenuKim, Kun WooJeong, Il GyoHu, XingHaoKim, Cheol Gi
DGIST Authors
Kim, Cheol Gi
Issue Date
2014-04
Citation
Journal of Magnetics, 19(1), 10-14
Type
Article
Article Type
Article
Keywords
planar Hall effect sensortrilayer structuresingle magnetic bead detectionmicrofluidics
ISSN
1226-1750
Abstract
In this study, we fabricate an integrated microfluidic chip with a planar Hall effect (PHE) sensor for single magnetic bead detection. The PHE sensor was constructed with a junction size of 10 μm × 10 μm using a trilayer structure of Ta(3 nm)/NiFe(10 nm)/Cu(1.2 nm)/IrMn(10 nm)/Ta(3 nm). The sensitivity of the PHE sensor was 19.86 μV/Oe. A diameter of 8.18 μm magnetic beads was used, of which the saturation magnetization was ~2.1 emu/g. The magnetic susceptibility χ of these magnetic beads was calculated to be ~0.14. The diluted magnetic beads solution was introduced to the microfluidic channel attributing a single bead flow and simultaneously the PHE sensor voltage was measured to be 0.35 μV. The integrated microchip was able to detect a magnetic moment of 1.98 × 10-10 emu. © The Korean Magnetics Society. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5813
DOI
10.4283/JMAG.2014.19.1.010
Publisher
한국자기학회
Related Researcher
  • Author Kim, CheolGi Lab for NanoBio-MatErials & SpinTronics(nBEST)
  • Research Interests Magnetic Materials and Spintronics; Converging Technology of Nanomaterials and Biomaterials; Bio-NEMS;MEMS
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceLab for NanoBio-Materials & SpinTronics(nBEST)1. Journal Articles


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