2006年8月10日 · The preparation of silica coated iron particles with improved oxidation-resistance was described in the paper. XRD, TEM and XPS were used to characterize the product, which indicated that a thin film of silica was coated on the surface of Fe particles through a silica–oxide–iron bond.

2008年2月15日 · The XPS spectra of Fe 3p for Fe 3 O 4, and Fe 0.94 O are analysed using the Fe 3+ and Fe 2+ peak parameters obtained from Fe 2 O 3 and 2FeO·SiO 2. The results of the analyses show that the Fe 2+ /Fe 3+ atomic ratio in stoichiometric Fe 3 O 4 is accurately predicted within experimental uncertainty.

xps，即x射线光电子能谱。 原理简单来说是将X射线光子入射到样品上，将样品的光电子和俄歇电子激发出来。 在阅读文献中，经常可以看到XPS图谱，用来分析样品表面元素的价态变化、成分和分子结构 下面以一个图来举例…

Highly dispersed Fe nanoparticles (NPs) were deposited on SiO2 NPs by atomic layer deposition (ALD) in a scalable fluidized bed reactor at 400 ºC. In CO oxidation reactions, over the...

Composite film of Fe nanoparticles embedded in a SiO2 matrix has been prepared by the co-evaporation of Fe and SiO2. Both source temperature and in-situ high magnetic field (HMF) have been...

2011年9月21日 · Results show the presence of Fe oxides after low-fluence low-energy ion implantation in SiO 2, suggesting that initially Fe substitutes for Si in the silica matrix. Larger Fe fluences lead to the formation of sub-2 nm metallic Fe nuclei.

High resolution X-ray Photoelectron Spectroscopy (XPS) core-level Si 2p and O 1s spectra of the nonconductors α-SiO2 (quartz) at 120 and 300 K and vitreous SiO2 at 300 K were obtained with a...

我们一直在研究通过射频磁控溅射在玻璃基板上制备的 Fe-SiO2 颗粒薄膜的磁性和传输特性。 在 Fe 体积分数小于 45% [1,2] 的薄膜中观察到超顺磁性和隧穿巨磁阻。

铁氧化物 Fe0.94O、Fe3O4、Fe2O3 和 Fe2SiO4 的样品在受控气体气氛中通过高温平衡制备。 样品在真空中断裂并测量断裂表面的高分辨率 XPS 光谱。 Fe2+ 和Fe3+ 的Fe 3p 峰位置和峰形参数分别来自2FeO·SiO2 和Fe2O3 标准样品的Fe 3p XPS 光谱。 使用这些参数，分析了 Fe3O4 和 Fe1-yO 的 Fe 3p 峰。 结果表明高分辨率 XPS 技术可用于确定金属氧化物中的 Fe2+/Fe3+ 比率。 该技术具有应用于其他过渡金属氧化物系统的潜力。 铁氧化物 Fe0.94O、Fe3O4、Fe2O3 和 …

2013年1月1日 · Core-level and valence-band XPS spectra for Fe 3 Si, FeSi, and FeSi 2 were collected from clean surfaces prepared by mechanically fracturing bulk polycrystalline silicides in a spectrometer under ultra-high vacuum. In the Fe 2p spectra, dependence of the binding energies and spectral shapes on the chemical states was found.