کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1526040 | 995365 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dendritic growth of amorphous gallium oxide in mixed GaOx/WOx thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The structure and morphology of mixed GaOx/WOx thin film systems prepared by either sequential or simultaneous oxide deposition has been studied by Analytical (High-Resolution) Transmission Electron Microscopy (TEM), Selected Area Electron Diffraction (SAED), X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscopy (AFM). GaOx and WOx were prepared by thermal evaporation of the corresponding oxides (β-Ga2O3 and WO3, respectively) in 10â2 Pa oxygen onto a NaCl substrate, which was held at temperatures between 298 and 580 K. The film morphology of differently prepared mixed GaOx/WOx films not only differs significantly from those of the pure oxides, but also strongly depends on the preparation conditions and the order of deposition. Upon co-deposition of GaOx/WOx films onto NaCl(0 0 1) at temperatures above 580 K a gallia morphology was observed, which is strikingly different from hitherto reported pure GaOx films, i.e., growth of small-diameter (20-25 nm) sub-stoichiometric gallia dendrites. The dendritic growth is apparently mediated by the GaOx/NaCl(0 0 1) contact area rather than being an intrinsic feature of the three-dimensional mixed-oxide bulk. In particular, neither sequentially deposited GaOx/WOx films nor co-deposited films on top of a pre-deposited WOx interlayer exhibited this peculiar morphology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 116, Issue 1, 15 July 2009, Pages 175-182
Journal: Materials Chemistry and Physics - Volume 116, Issue 1, 15 July 2009, Pages 175-182
نویسندگان
Simon Penner, Michael Stöger-Pollach, Frederik Klauser, Harald Lorenz, Bernhard Klötzer, Xianjie Liu, Bernd Jenewein, Erminald Bertel,