Nanostructured Biosensor of Cobalt Line Array on Permalloy Film

Author

Tzu-Wen Kuo ; Hao-Ting Huang ; Chia-Wei Chiang ; Kuei-Tien Liao ; Zung-Hang Wei

Author_Institution

Inst. of Nanoengineering & Microsyst., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

49

Issue

7

fYear

2013

fDate

Jul-13

Firstpage

4040

Lastpage

4043

Abstract

We fabricated bio-sensing devices based on two different stacking configurations-Co line array and Permalloy film (Ni₈₁Fe₁₉)/Co line array. Magnetic hysteresis loops were measured via vibrating sample magnetometer, the presence of the stray field induced from the magnetic particle within the cell would hinder the magnetization switching process, by analyzing the shift in switching field we can determine the presence of magnetically labeled cells. Our results showed that the presence of magnetic cell would increase the magnitude of switching field, and structure with Py film/Co line array yields a much higher change in switching field than Co line array.

Keywords

Permalloy; biosensors; cellular biophysics; cobalt; magnetic hysteresis; magnetic particles; magnetisation reversal; magnetometers; nanosensors; Ni₈₁Fe₁₉-Co; Permalloy film; Py film-Co line array; biosensing devices; cobalt line array; magnetic hysteresis loops; magnetic particle; magnetically labeled cells; magnetization switching process; nanostructured biosensor; stacking configurations; stray field; vibrating sample magnetometer; Arrays; Magnetic hysteresis; Magnetic switching; Perpendicular magnetic anisotropy; Sensors; Switches; Biosensor; permalloy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2241746

Filename

6559232