کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5424583 | 1395829 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study of the interaction between perylene and the TiO2(1Â 1Â 0)-(1Â ÃÂ 1) surface-based on XPS, UPS and NEXAFS measurements
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The interaction between a semi-large aromatic hydrocarbon compound (perylene) and the TiO2(1 1 0)-(1 Ã 1) surface under ultra high vacuum conditions has been probed by X-ray photoemission spectroscopy (XPS), ultraviolet photoemission spectroscopy (UPS) and near-edge X-ray absorption fine structure (NEXAFS) methods. UPS measurements of the adsorbate system have been compared with an experimental UPS spectrum of perylene in the gas phase and a calculated spectrum obtained by means of density functional theory (DFT) methods. NEXAFS results of perylene molecules adsorbed on TiO2(1 1 0)-(1 Ã 1) were compared with data from an α-phase perylene single crystal. A novel analysis of the valence data has been employed to show that no strong chemical interaction takes place between perylene and the TiO2(1 1 0)-(1 Ã 1) surface. Furthermore, angle-dependent NEXAFS measurements and the growth curve results suggest that the perylene molecules are oriented flat down onto the TiO2 substrate due to weak van der Waals interactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 9, 1 May 2009, Pages 1270-1275
Journal: Surface Science - Volume 603, Issue 9, 1 May 2009, Pages 1270-1275
نویسندگان
Jens Bæk Simonsen, Bartosz Handke, Zheshen Li, Preben Juul Møller,