کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1596531 | 1002831 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and optical properties of single crystalline GaN nanorods with a rectangular cross-section
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
GaN nanorods were synthesized from the reaction of a Ga/Ga2O3 mixture with NH3 on Si substrates by chemical vapor deposition. The synthesized products were characterized by scanning and transmission electron microscopy, X-ray diffraction, photoluminescence and Raman spectroscopy. The nanorods are highly single crystalline and possess uniform smooth surfaces. PL revealed only a strong emission at 3.268Â eV, ascribed to free exciton (FX) transitions, at room temperature; while the well-known yellow luminescence band centered at 2.2-2.3Â eV was not detected. Four first-order phonon modes, corresponding to the A1(TO), E1(TO), E2(high), and A1(LO) at â¼531, 554, 564, and 721Â cmâ1, respectively, were observed by Raman backscattering. The red-shift of the FX emission peak and the down-shifts of the Raman modes by a few wave numbers are attributed to the presence of tensile strain inside GaN nanorods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 139, Issue 8, August 2006, Pages 387-390
Journal: Solid State Communications - Volume 139, Issue 8, August 2006, Pages 387-390
نویسندگان
Xitian Zhang, Zhuang Liu, Chingchi Wong, Suikong Hark,