Biological sensing using anomalous hall effect devices

Akhil K. Ramesh, Yi Ting Chou, Mu Ting Lu, Pushparaj Singh, Yuan Chieh Tseng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper outlines an approach to biological sensing involving the use of spintronic devices to sense magnetic particles attached to biological carriers. We developed an enzyme-linked immunosorbent assay (ELISA)-based Anomalous Hall Effect magnetic sensor via surface functionalization using Triethoxysilylundecanal (TESUD). The proposed sensor uses a CoFeB/MgO heterostructure with a perpendicular magnetic anisotropy. Through several sets of magnetic layer thickness, this work also explored the optimization process of ferromagnetic layer used. Our spintronics-based biosensor is compatible with semiconductor fabrication technology and can be effectively miniaturized to integrate with semiconductor chips, which has the advantage of reduced manufacturing cost and reduced power consumption. The proposed sensor provides real-Time measurement results and it is competitive to conventional biological colorimetric measurement systems in terms of accuracy and immediacy.

Original languageEnglish
Article number335502
JournalNanotechnology
Volume33
Issue number33
DOIs
StatePublished - 13 Aug 2022

Keywords

  • biological measurements
  • magnetic anisotropy
  • magnetic biosensor
  • magnetic nanoparticles
  • spintronic sensor

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