Departamento de Física Aplicada, Universidade de Vigo , 36310, Vigo, Spain.
Nano Lett. 2014 Feb 12;14(2):640-7. doi: 10.1021/nl4038533. Epub 2014 Jan 30.
Cobalt oxide octahedra were synthesized by thermal decomposition. Each octahedron-shaped nanoparticle consists of an antiferromagnetic CoO core enclosed by eight {111} facets interfaced to a thin (∼ 4 nm) surface layer of strained Co3O4. The nearly perfectly octahedral shaped particles with 20, 40, and 85 nm edge length show a weak room-temperature ferromagnetism that can be attributed to ferromagnetic correlations appearing due to strained lattice configurations at the CoO/Co3O4 interface.
八面体钴氧化物由热分解合成。每个八面体形状的纳米颗粒由一个反铁磁 CoO 核心组成，核心被八个{111}面封闭，与一层薄的（约 4nm）应变 Co3O4 表面层相接。具有 20nm、40nm 和 85nm 边长的近乎完美的八面体形状的颗粒在室温下表现出弱铁磁性，这可以归因于 CoO/Co3O4 界面处的晶格构型应变导致的铁磁关联。
