Deposition and characterization of large-scale FePt nanoparticle monolayers on SiO2/Si surface
Deposition and characterization of large-scale FePt nanoparticle monolayers on SiO2/Si surface
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SiO2/Si 表面大尺寸 FePt 纳米颗粒单层的沉积和表征
DOI：
10.1016/j.surfcoat.2009.09.081
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发表时间：
2010-01
影响因子：
5.4
通讯作者：
Yang, Fujun
中科院分区：
文献类型：
--
作者：
Zhang, Jun;Zhou, Minjie;Wang, Hao;Jiang, Yong;Wang, Hanbin;Li, Quan;Yang, Fujun
采用简单的旋涂法，在大尺度SiO2/Si衬底上沉积了均匀的FePt纳米颗粒单层。采用高分辨率扫描电镜对其表面形貌和颗粒密度进行了研究。在sio2表面获得了长度为1.5cm的不同形貌的FePt纳米颗粒单层。考察了表面活性剂、胶体浓度、溶剂和纳米颗粒形状对颗粒膜均匀性的影响。对FePt单层薄膜进行一次高温退火后，薄膜由超顺磁性转变为铁磁性，同时薄膜表现出有限的颗粒烧结。
The deposition of uniform monolayers of FePt nanoparticles on macro-scaled SiO2/Si substrate was demonstrated by employing a simple spin-coating method. The surface morphology and particle density of the monolayers was studied with high resolution scanning electron microscope. FePt nanoparticle monolayers with different morphology were obtained on SiO2surface at length scales of 1.5cm. The effects of surfactants, colloid concentration, solvents as well as the shape of the nanoparticles on the uniformity of the particle film were investigated. A primary high temperature annealing on the FePt monolayer films resulted in phase transition from the super-paramagnetic phase into the ferromagnetic one, while the monolayer exhibited limited particle-sintering.
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