title: Synthesis and characterization of magnetic poly(divinyl benzene)/Fe3O4, C/Fe3O4/Fe, and C/Fe onionlike fullerene micrometer-sized particles with a narrow size distribution.
abstract: Magnetic poly(divinyl benzene)/Fe(3)O(4) microspheres with a narrow size distribution were produced by entrapping the iron pentacarbonyl precursor within the pores of uniform porous poly(divinyl benzene) microspheres prepared in our laboratory, followed by the decomposition in a sealed cell of the entrapped Fe(CO)(5) particles at 300 °C under an inert atmosphere. Magnetic onionlike fullerene microspheres with a narrow size distribution were produced by annealing the obtained PDVB/Fe(3)O(4) particles at 500, 600, 800, and 1100 °C, respectively, under an inert atmosphere. The formation of carbon graphitic layers at low temperatures such as 500 °C is unique and probably obtained because of the presence of the magnetic iron nanoparticles. The annealing temperature allowed control of the composition, size, size distribution, crystallinity, porosity, and magnetic properties of the produced magnetic microspheres.
authors.affiliation: Institute of Nanotechnology & Advanced Materials, Department of Chemistry, Bar Ilan University, Ramat Gan 52900, Israel.
authors.forename: Ron
authors.initials: R
authors.lastname: Snovski
authors.forename: Judith
authors.initials: J
authors.lastname: Grinblat
authors.forename: Shlomo
authors.initials: S
authors.lastname: Margel
mesh_terms: D002244:Carbon / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008863:Microspheres; D010316:Particle Size; D011145:Polyvinyls / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D058185:Magnetite Nanoparticles; D011145:Polyvinyls; D002244:Carbon; D007501:Iron