纳米晶LaFeO3 薄膜的制备与不同气氛处理后的光电子能谱

Abstract

Abstract: Nanocrystalline LaFeO₃ films were synthesized via the sol-gel technique on silicon substrate. XPS spectra were taken after the nanocrystalline LaFeO₃ films were treated in ethanol and nitrogen dioxide gases respectively. XPS analysis showed that when ethanol was adsorbed by LaFeO₃ film, the surface adsorption of oxygen obviously decreased, Fe content decreased a little bit as well; on the other hand, when NO₂ was adsorbed on its surface, the surface adsorbed oxygen increased apparently and Fe content increased as well; in the mean time, the transition trend from Fe³⁺to Fe⁴⁺ was found. All the observations above show that the mechanism of the gas sensitivity of nanocrystalline LaFeO₃ films is closely related with the surface adsorption of oxygen and the changeable valance of iron. 

Key words: film, nanocrystalline material, XPS

CLC Number:

O484.5

SUO Hui, ZHAO Yi, HU Guang-da, RUAN Sheng-ping, WU Zhi-fa, XU Bao-kun. Preparation of Nanocrystalline LaFeO3 Film and XPS Studies on Nanocrystalline LaFeO3 Films Treated in Different Atmospheres〖ST〗〖WT〗Preparation of Nanocrystalline LaFeO3 Film and XPS Studies on Nanocrystalline LaFeO3 Films Treated in Different Atmospheres[J].J4, 2006, 44(03): 465-468.

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Preparation of Nanocrystalline LaFeO3 Film and XPS Studies on Nanocrystalline LaFeO3 Films Treated in Different Atmospheres〖ST〗〖WT〗Preparation of Nanocrystalline LaFeO3 Film and XPS Studies on Nanocrystalline LaFeO3 Films Treated in Different Atmospheres

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