Synthetic control over magnetic moment and exchange bias in all-oxide materials encapsulated within a spherical protein cage.
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.
Klem
Michael T
MT
Department of Chemistry and Biochemistry, Center for Bio-Inspired Nanomaterials, Montana State University, Bozeman, Montana 59717, USA.
Resnick
Damon A
DA
Gilmore
Keith
K
Young
Mark
M
Idzerda
Yves U
YU
Douglas
Trevor
T
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
D000497:Alloys; D002214:Capsules; D005290:Ferric Compounds; D010087:Oxides; C000499:ferric oxide; D003035:Cobalt; D005293:Ferritins; C060728:cobalt oxide