Synthesis and structure of magnetic core-shell Ni-Ce nanocomposite particles

被引:3
作者
Sun, XC
Toledo, JA
Cui, ZL
Zhang, ZK
机构
[1] Inst Mexicano Petr, Prog Simulac Mol, Mexico City 07730, DF, Mexico
[2] Qingdao Inst Chem Technol, Res Ctr Nanometer Mat, Qingdao 266042, Peoples R China
关键词
magnetic; nanocomposite; core-shell; Ni-Ce; transmission electron microscopy; twin faults;
D O I
10.1023/A:1017984221219
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new type of magnetic core-shell Ni-Ce nanocomposite particles (15-50 nm) is presented. SEM observations suggest the particles are strongly ferromagnetic, interacting with ordered chain-like features. Typical HR-TEM images demonstrate that many planar defects (nanotwins and stacking faults) exist in the surface shell and large Ni core zone (10-40 nm) of the particles; the inner shell layers (4-6 nm) consist of NiCe alloy and the outermost shell is NiO. Nano-diffraction patterns show an indication of well-defined spots characteristic of nanocomposite materials, of which certain crystal facet orientation relationships between orthorhombic [111] of NiCe and cubic [311] of Ni2Ce, face-center crystal [222] of NiO, cubic [111] of nickel have been identified. This confirms the nature of this core-shell nanocomposite particle.
引用
收藏
页码:325 / 328
页数:4
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