Size-controlled synthesis of nickel nanoparticles
Size-controlled synthesis of nickel nanoparticles
复制标题
DOI：
10.1016/j.apsusc.2004.09.045
复制
发表时间：
2005-02
影响因子：
6.7
通讯作者：
Yanglong Hou;H. Kondoh;T. Ohta;Song Gao
中科院分区：
文献类型：
--
作者：
Yanglong Hou;H. Kondoh;T. Ohta;Song Gao
在十六烷基胺（HDA）和氧化三辛基膦（TOPO）存在下，乙酰丙酮镍、镍（acac）2和硼氢化钠或超氢化钠容易还原得到单分散的镍纳米颗粒。在传统的半导体纳米晶体合成中，HDA和TOPO的结合也为金属纳米颗粒的合成提供了更好的颗粒生长控制。根据反应体系中HDA与TOPO的比例，Ni纳米颗粒的尺寸可以很容易地从3到11nm调整。通过x射线衍射（XRD）和选择区域电子衍射（SAED）对合成的Ni纳米颗粒进行了表征。透射电镜（TEM）图像显示，Ni纳米颗粒具有较窄的尺寸分布。SQUID磁强计也被用于表征Ni纳米颗粒。该合成过程可扩展到制备高质量的金属或合金纳米颗粒。
A facile reduction approach with nickel acetylacetonate, Ni(acac)2, and sodium borohydride or superhydride leads to monodisperse nickel nanoparticles in the presence of hexadecylamine (HDA) and trioctylphosphine oxide (TOPO). The combination of HDA and TOPO used in the conventional synthesis of semiconductor nanocrystals also provides better control over particle growth in the metal nanoparticle synthesis. The size of Ni nanoparticles can be readily tuned from 3 to 11nm, depending on the ratio of HDA to TOPO in the reaction system. As-synthesized Ni nanoparticles have a cubic structure as characterized by power X-ray diffraction (XRD), selected-area electron diffraction (SAED). Transmission electron microscopy (TEM) images show that Ni nanoparticles have narrow size distribution. SQUID magnetometry was also used in the characterization of Ni nanoparticles. The synthetic procedure can be extended to the preparation of high quality metal or alloy nanoparticles.