کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5369342 | 1388428 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The surface change of TiO2 film induced by UV illumination and the effects on UV-vis transmission spectra The surface change of TiO2 film induced by UV illumination and the effects on UV-vis transmission spectra](/preview/png/5369342.png)
It is observed for the first time that the interference peaks of transmission spectra of TiO2 film shift to the shorter wavelength after UV illumination. The atomic force microscopy (AFM) was used to monitor the dynamic change of the film surface with UV illumination time, which shows that a â¼30Â nm water layer can be formed on the surface after 90Â min UV illumination. The XPS analysis revealed that the water layer is composed of physically absorbed water molecule because it can be wiped off by ultra high vacuum (UHV). At last, based on those analyses, a model was established that uses characteristic matrix and admittance to simulate the effect of UV illumination on the film transmission spectra, and it is found that the film refractive index slightly decreases with UV illumination, which may be due to the absorbed water and other surface structure changes induced by UV illumination.
Journal: Applied Surface Science - Volume 255, Issue 5, Part 2, 30 December 2008, Pages 2752-2758