The Scale of FePt Nanoparticles A 3.5 nm FePt particle Volume 22 nm 3 or 2.2 x 10 -20 cm 3

2
THE UNIVERSITY OF ALABAMA Center For Materials For Information Technology A NSF Materials Research Science and Engineering Center Metrology Needs for Magnetic Nanoparticles How to Measure the Magnetic Properties of Individual Particles? David E. Nikles Department of Chemistry and Center for Materials for Information Technology The University of Alabama, Tuscaloosa, Alabama 35487-0209 The Scale of FePt Nanoparticles A 3.5 nm FePt particle Volume 22 nm 3 or 2.2 x 10 - 20 cm 3 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

description

Metrology Needs for Magnetic Nanoparticles How to Measure the Magnetic Properties of Individual Particles? David E. Nikles Department of Chemistry and Center for Materials for Information Technology The University of Alabama, Tuscaloosa, Alabama 35487-0209. The Scale of FePt Nanoparticles - PowerPoint PPT Presentation

Transcript of The Scale of FePt Nanoparticles A 3.5 nm FePt particle Volume 22 nm 3 or 2.2 x 10 -20 cm 3

Page 1: The Scale of FePt Nanoparticles A 3.5 nm FePt particle Volume 22 nm 3  or 2.2 x 10 -20  cm 3

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

Page 2: The Scale of FePt Nanoparticles A 3.5 nm FePt particle Volume 22 nm 3  or 2.2 x 10 -20  cm 3

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