کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1689592 | 1011234 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of substrate structures on epitaxial growth and electrical properties of WO3 thin films deposited on (1¯012) and (0001) α-Al2O3 surfaces
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of substrate structures on epitaxial growth and electrical properties of WO3 thin films deposited on (1¯012) and (0001) α-Al2O3 surfaces Effect of substrate structures on epitaxial growth and electrical properties of WO3 thin films deposited on (1¯012) and (0001) α-Al2O3 surfaces](/preview/png/1689592.png)
چکیده انگلیسی
The effect of surface structures of annealed (1¯012) and (0001) α-Al2O3 substrates on epitaxial growth and electrical properties of electron beam deposited WO3 thin films has been investigated. (0001) and (1¯012) α-Al2O3 surfaces were used in (1 Ã 1) stoichiometric and reconstructed forms. The structure and the morphology of WO3 films were determined by transmission electron microscopy (TEM), selected area electron diffraction (SAED) and reflection high energy electron diffraction (RHEED). Generally the films consist of micro-grains of monoclinic WO3 and the (010) planes are parallel to the substrate surfaces. Certain epitaxial relationships between WO3 films and the substrate surfaces were found. These phenomena are interpreted by nucleation and growth theories in relation to a variation of the density of surface oxygen vacancies of the α-Al2O3 substrates. The electrical conductivity of the WO3 films was measured as a function of annealed temperatures of the substrates. The activation energy for conduction deduced from the Arrhenius equation is found to be dependent on the grain size and the morphology of WO3 films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 83, Issue 11, 14 July 2009, Pages 1326-1332
Journal: Vacuum - Volume 83, Issue 11, 14 July 2009, Pages 1326-1332
نویسندگان
Ahmad Al Mohammad,