Measurement of the concentration of magnetic nanoparticles in a fluid using a giant magnetoresistance sensor with a trench

A highly sensitive giant magnetoresistance sensor with a micropatterned trench is described for the measurement of the concentration of magnetic nanoparticles in a fluid, within a few micrometers from its surface. The measurement is based on an analysis of the time-dependent development of the signa...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2008-02, Vol.320 (3), p.486-489
Main Authors: Thilwind, R.E., Megens, M., van Zon, J.B.A.D., Coehoorn, R., Prins, M.W.J.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Giant magnetoresistance
Magnetic biosensor
Magnetic liquids
Magnetic particle
Magnetic properties and materials
Physics
Studies of specific magnetic materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A highly sensitive giant magnetoresistance sensor with a micropatterned trench is described for the measurement of the concentration of magnetic nanoparticles in a fluid, within a few micrometers from its surface. The measurement is based on an analysis of the time-dependent development of the signal. A comparison of the experimental data with the results of model-calculations reveals the significant roles played by diffusion and sedimentation in the fluid. These results are relevant for the development of reliable biological tests based on magnetic biosensors.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2007.07.006