https://doi.org/10.1051/epjap/2010023
Characterization of polyaniline-coated magnetic nanoparticles for application in a disposable membrane strip biosensor
1
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: alocilja@msu.edu
Received:
4
February
2009
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
