کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1546040 997606 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thickness-dependent electronic and optical properties of faceted hexagonal aluminum nitride nanotubes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Thickness-dependent electronic and optical properties of faceted hexagonal aluminum nitride nanotubes
چکیده انگلیسی

Electronic and optical properties of aluminum nitride nanotubes are studied in the framework of density-functional theory. It is found that the surface atoms attribute their electronic states near the upper valence band edge as well as the lower conduction band edge as defect states. Moreover, the absorption spectrum of a AlN nanotube is shown to be correlated with the ratios of the surface atoms to the bulk atoms. As tube thickness increases, a AlN tube is observed to have an increased tendency to show an optical absorption of bulk wurtzite AlN. Therefore, we predict that for realistic AlN nanotubes with large thicknesses (30–80 nm), the absorption spectra are most probably originating from the electronic states arising from the bulk portion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 41, Issue 2, December 2008, Pages 254–257
نویسندگان
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