Synthesis and magnetic properties of nickel nanocrystals
Synthesis and magnetic properties of nickel nanocrystals
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DOI：
10.1016/j.materresbull.2005.09.019
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发表时间：
2006-03
影响因子：
5.4
通讯作者：
Haitao Zhang;Gangshan Wu;Xianhui Chen;X. Qiu
中科院分区：
文献类型：
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作者：
Haitao Zhang;Gangshan Wu;Xianhui Chen;X. Qiu
研究了以乙酰丙酮镍为原料，油胺为非配位剂，通过热分解法合成镍纳米晶的过程。采用三种方法合成了直径在20- 60 nm范围内的纳米晶。所得纳米颗粒的特征在于是具有面心立方型的单相纳米晶镍。研究了尺寸可控纳米晶的形成机理，发现通过分离成核和生长过程可以形成相对单分散的纳米晶，而通过调节生长周期可以控制尺寸。磁性测量表明，样品仍然是铁磁性的，并且它们的饱和磁化强度和磁化率是尺寸依赖性的。
Size-controlled synthesis of nickel nanocrystals by the decomposition of nickel acetylacetone in a noncoordinating reagent, oleylamine, was studied. Three processes were employed to synthesize nanocrystals with diameters in the range of 20–60nm. The resultant nanoparticles were characterized to be single-phase nanocrystalline nickel with a face-centered cubic type. Mechanism of the size-controlled nanocrystals formation was studied and found that relative monodispersed nanocrystals could be formed by the separation of nucleation and growth process while the size could be controlled through modulating growth period. Magnetic measurements showed that samples were still ferromagnetic, and that their saturation magnetization and coercivity are size-dependent.