Ordered Magnetic Nanocomposites from Multifunctional Core-Shell Nanoparticles

1. Ordered Magnetic Nanocomposites from Multifunctional Core-Shell Nanoparticles Hong Yang, University of Rochester, DMR-0449849 Magnetic nanocomposites are made of nanometer (nm) sized materials with different magnetic properties. They become increasingly important because the proper couplings or interactions between two or more nanoscale components is critical for making advanced permanent magnets and in the design of next-generation ultrahigh magnetic data storage media beyond the so-called “superparamagnetic limit”. In this program, we have so far designed and synthesized platinum-iron oxide core-shell nanoparticles using a sequential synthetic method and used these particles as building blocks for creating technologically important FePt-alloy containing ordered magnetic nanocomposites, which have predetermined nanostructures and shown strong structure-dependent magnetic properties. This deterministic bottom-up synthetic method will lead to the discovery of other important new multifunctional nanomaterials.

2. Ordered Magnetic Nanocomposites from Multifunctional Core-Shell Nanoparticles Hong Yang, University of Rochester, DMR-0449849 Broader Impact Five refereed papers have been published or accepted in J. Am. Chem. Soc, Nanotechnology, Adv. Mater., Nano Lett. and Small so far this year. Professor Yang co-organized the symposium on multifunctional nanomaterials in Materials Research Society Spring Meeting in April 2005. For third years in a row, Prof. Yang has accepted undergraduate interns and high school students, including those from the under-representative groups, into his program to conduct research in the area of nanoscience and nanotechnology. Group Photo (08/2005). Second row L-R: Yong Wang (PhD student), Sam Frommer (undergraduate), Xiaowei Teng (PhD student) and Xingyi Liang (Postdoctoral fellow). First Row L-R: Sean Maksimuk (PhD student), Hong Yang (PI), Aaron Frazier (American Chemical Society Project SEED student, high school intern) and Vincent Tutino (high school intern).