کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5395482 | 1505719 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
X-ray irradiation induced effects on the chemical and electronic properties of MoO3 thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: X-ray irradiation induced effects on the chemical and electronic properties of MoO3 thin films X-ray irradiation induced effects on the chemical and electronic properties of MoO3 thin films](/preview/png/5395482.png)
چکیده انگلیسی
The time and photon-flux dependent x-ray irradiation induced effects on the chemical and electronic properties of MoO3 thin films have been systematically investigated by ultraviolet photoelectron spectroscopy (UPS) and x-ray photoelectron spectroscopy (XPS). After exposure to Mg Kα x-ray irradiation of different photon flux (realized by using different x-ray source powers: 30, 100, and 300 W), the Mo 3d XPS spectra indicate a partial conversion of the Mo6+ states in MoO3 to Mo5+ states. The degree of reduction significantly depends on exposure time and x-ray source power (i.e., photon flux). To minimize x-ray irradiation induced effects on the collected data, a measurement time of 1-2 h at a low photon flux should not be exceeded. Related UPS analysis shows that no effects of UV irradiation can be detected and reveals the x-ray irradiation induced appearance of defect states above the valence band maximum (VBM). The intensity of these above-VBM states increases linearly inverse with the XPS derived Mo6+/(Mo5+ + Mo6+) ratio, suggesting an x-ray induced loss of oxygen as the common explanation for both effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 212, October 2016, Pages 50-55
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 212, October 2016, Pages 50-55
نویسندگان
X. Liao, A.R. Jeong, R.G. Wilks, S. Wiesner, M. Rusu, M. Bär,