title: Electrospun polyvinylpyrrolidone fibers with high concentrations of ferromagnetic and superparamagnetic nanoparticles.
abstract: Electrospun polymer fibers were prepared containing mixtures of different proportions of ferromagnetic and superparamagnetic nanoparticles. The magnetic properties of these fibers were then explored using a superconducting quantum interference device. Mixed superparamagnetic/ferromagnetic fibers were examined for mesoscale magnetic exchange coupling, which was not observed as theoretically predicted. This study includes some of the highest magnetic nanoparticle loadings (up to 50 wt%) and the highest magnetization values (≈ 25 emu/g) in an electrospun fiber to date and also demonstrates a novel mixed superparamagnetic/ferromagnetic system.
authors.affiliation: Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
authors.forename: Minoru
authors.initials: M
authors.lastname: Miyauchi
authors.forename: Trevor J
authors.initials: TJ
authors.lastname: Simmons
authors.forename: Jianjun
authors.initials: J
authors.lastname: Miao
authors.forename: Jennifer E
authors.initials: JE
authors.lastname: Gagner
authors.forename: Zachary H
authors.initials: ZH
authors.lastname: Shriver
authors.forename: Udayanath
authors.initials: U
authors.lastname: Aich
authors.forename: Jonathan S
authors.initials: JS
authors.lastname: Dordick
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Linhardt