THE UNIVERSITY OF ALABAMA Center For Materials For Information TechnologyA NSF Materials Research Science and Engineering Center
Metrology Needs for Magnetic NanoparticlesHow to Measure the Magnetic Properties of Individual Particles?David E. NiklesDepartment of Chemistry and Center for Materials for Information TechnologyThe University of Alabama, Tuscaloosa, Alabama 35487-0209
The Scale of FePt Nanoparticles
A 3.5 nm FePt particle
Volume 22 nm3 or 2.2 x 10-20 cm3
About 816 Fe atoms and 816 Pt atoms
Mass 3.4 x 10-19 g
Magnetization 2.5 x 10-17 emu
Self-assembled FePt nanoparticles
THE UNIVERSITY OF ALABAMA Center For Materials For Information TechnologyA NSF Materials Research Science and Engineering Center
Biomedical Applications of Magnetic Nanoparticles
Bead Array Counter (BARC)
BARC Biosensor
Chip for the multi-analyte assay of biomolecules
Uses
DNA hybridization
GMR sensing
Magnetic bead labeling
Detection of biowarfare agentsIllustration courtesy of D. T. Johnson, Department of Chemical Engineering, University of Alabama