title: Applied magnetic field rejects the coating of ferromagnetic carbon from the surface of ferromagnetic cobalt: RAPET of CoZr2(acac)2(OiPr)8.
abstract: We present the results of the RAPET (reaction under autogenic pressure at elevated temperatures) dissociation of CoZr(2)(acac)(2)(O(i)Pr)(8) at 700 degrees C in a closed Swagelok cell under an applied magnetic field of 10 T. It produces a mixture of carbon-coated and noncoated metastable ZrO(2) nanoparticles, bare metallic Co nanoparticles, and bare carbon. The same reaction in the absence of a magnetic field produces spherical Co and ZrO(2) particles in sizes ranging from 11 to 16 nm and exhibiting, at room temperature, metastable phases: fcc for cobalt and a tetragonal phase for zirconia. The metastable phases of Co and ZrO(2) are manifested because of a carbon shell of approximately 4 nm thickness anchored to their surfaces. The effect of an applied magnetic field to synthesize morphologically different, but structurally the same, products is the key topic of the present paper.
authors.affiliation: Department of Chemistry and Kanbar Laboratory for Nanomaterials, Bar-Ilan University Center for Advanced Materials and Nanotechnology, Ramat-Gan, 52900, Israel.
authors.forename: Vilas G
authors.initials: VG
authors.lastname: Pol
authors.forename: Swati V
authors.initials: SV
authors.lastname: Pol
authors.forename: Aharon
authors.initials: A
authors.lastname: Gedanken
authors.forename: Vadim G
authors.initials: VG
authors.lastname: Kessler
authors.forename: Gulaim A
authors.initials: GA
authors.lastname: Seisenbaeva
authors.forename: Mun-Gyu
authors.initials: MG
authors.lastname: Sung
authors.forename: Shigeo
authors.initials: S
authors.lastname: Asai