Event Information
Shouheng Sun
(IBM-Thomas J. Watson Research Center)
Self-assembled Magnetic Nanostructures
Chemistry Seminar
Self-assembled Magnetic Nanostructures
- Abstract:
- Ordered arrays of magnetic nanoparticles are promising candidates for
future high-performance magnetic nanodevices. I will demonstrate that
monodisperse half-metallic magnetite (Fe3O4), and metallic cobalt (Co) and
iron-platinum (FePt) magnetic nanoparticles can be readily synthesized by
chemical methods, and subsequently induced to form 2-D and 3-D
self-assembled magnetic nanoparticle arrays. I will further demonstrate
that the distance between two particles can be adjusted by either thermal
treatment or surface chemical ligand exchange. Magnetic properties of these
arrays can be tuned from superparamagnetic to ferromagnetic. These
controlled magnetic nanoparticle arrays are of great interest for deep
understanding of nanomagnetism and will be essential for future fabrication
of magnetic nanodevices. Several examples of the potential applications of
these self-assembled nanoparticle arrays in magnetic recording, tunneling
devices and permanent magnet will be illustrated.
Host: Jie Liu
Chemistry Seminar