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Characterization of polyaniline-coated magnetic nanoparticles for application in a disposable membrane strip biosensor

Published online by Cambridge University Press:  15 March 2010

J. S. Yuk ,
J. Rose  and
E. C. Alocilja
J. S. Yuk
Affiliation:
Department of Biosystems and Agricultural Engineering, East Lansing, MI, 48824, USA
J. Rose
Affiliation:
Department of Crop and Soil Science, Michigan State University, East Lansing, MI, 48824, USA
E. C. Alocilja*
Affiliation:
Department of Biosystems and Agricultural Engineering, East Lansing, MI, 48824, USA
*
alocilja@msu.edu
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Abstract

We investigated the electrical properties of polyaniline-coated magnetic nanoparticles as a signal transducer for application in a disposable membrane strip biosensor. The size of these particles (~100 nm) was investigated by a transmission electron microscope. Electrical properties of these nanoparticles were investigated by four-point probe measurements and I-V measurements. Polyaniline-coated magnetic nanoparticles had a resistivity of 0.385 Ω cm and showed ohmic behavior. Resistance decreased with increasing concentration of polyaniline. We also demonstrated that the resistance decreased with increasing concentration of biotinylated IgG conjugated with these nanoparticles.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 50 , Issue 1 , April 2010 , 11401
Copyright
© EDP Sciences, 2010

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