Magneto-Impedance Biosensor With Enhanced Sensitivity for Highly Sensitive Detection of Nanomag-D Beads

Author

Devkota, J. ; Ruiz, Alberto ; Mukherjee, Partha ; Srikanth, Hariharan ; Manh-Huong Phan

Author_Institution

Dept. of Phys., Univ. of South Florida, Tampa, FL, USA

Volume

49

Issue

7

fYear

2013

fDate

Jul-13

Firstpage

4060

Lastpage

4063

Abstract

A magnetoimpedance (MI) biosensor based on Co-based amorphous ribbon was designed and tested to detect functionalized Nanomag-D magnetic beads. While previous studies were focused mainly on exploring the MI change for biosensing, we show that the sensitivity of the biosensor can be enhanced when the change in ac magnetoresistance (MR) or magnetoreactance (MX) is used. The frequency at which the sensitivity of the sensor is optimized can be tuned. This is of potential interest in developing functional biosensors with improved sensitivity and tunable frequency.

Keywords

biosensors; cobalt; enhanced magnetoresistance; magnetic sensors; nanomagnetics; Co; Co-based amorphous ribbon; MI biosensor; MR; MX; ac magnetoresistance; functionalized Nanomag-D magnetic beads; magnetoimpedance biosensor; magnetoreactance; Amorphous magnetic materials; Biosensors; Magnetic resonance imaging; Rough surfaces; Sensitivity; Superconducting magnets; Surface treatment; Magnetic biosensors; magnetoimpedance (MI); magnetoreactance (MX); magnetoresistance (MR);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2235414

Filename

6558933