title: Synthetic control over magnetic moment and exchange bias in all-oxide materials encapsulated within a spherical protein cage.
abstract: This work focuses on the synthetic control of magnetic properties of mixed oxide magnetic nanoparticles of the general formula Fe(3-x)Co(x)O(4) (x < or = 0.33) in the protein cage ferritin. In this biomimetic approach, variations in the chemical synthesis result in the formation of single-phase Fe(3-x)Co(x)O(4) alloys or intimately mixed binary phase Fe/Co oxides, modifying the chemical structure and magnetic behavior of these particles, as characterized by static and dynamic magnetization measurements and X-ray absorption spectroscopy.
authors.affiliation: Department of Chemistry and Biochemistry, Center for Bio-Inspired Nanomaterials, Montana State University, Bozeman, Montana 59717, USA.
authors.forename: Michael T
authors.initials: MT
authors.lastname: Klem
authors.forename: Damon A
authors.initials: DA
authors.lastname: Resnick
authors.forename: Keith
authors.initials: K
authors.lastname: Gilmore
authors.forename: Mark
authors.initials: M
authors.lastname: Young
authors.forename: Yves U
authors.initials: YU
authors.lastname: Idzerda
authors.forename: Trevor
authors.initials: T
authors.lastname: Douglas
mesh_terms: D000497:Alloys / Q000737:chemistry; D032701:Biomimetics / Q000379:methods*; D002214:Capsules; D003035:Cobalt / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D005293:Ferritins / Q000737:chemistry*; D008280:Magnetics; D053758:Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013057:Spectrum Analysis; D014965:X-Rays
chemical_list: D000497:Alloys; D002214:Capsules; D005290:Ferric Compounds; D010087:Oxides; C000499:ferric oxide; D003035:Cobalt; D005293:Ferritins; C060728:cobalt oxide