Eur. Phys. J. Appl. Phys.
Volume 50, Number 1, April 2010
|Number of page(s)||5|
|Section||Biophysics and Biosensors|
|Published online||15 March 2010|
Characterization of polyaniline-coated magnetic nanoparticles for application in a disposable membrane strip biosensor
Department of Biosystems and Agricultural Engineering, East Lansing, MI, 48824, USA
2 Department of Crop and Soil Science, Michigan State University, East Lansing, MI, 48824, USA
Corresponding author: email@example.com
Revised: 14 December 2009
Accepted: 5 January 2010
Published online: 15 March 2010
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.
© EDP Sciences, 2010
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