کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364880 | 1388321 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of N-deficient GaN nanoparticles and its enhanced dielectric response
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
In this paper, GaN nanoparticles were firstly synthesized through a facile solid-state reaction using an organic reagent cyanamide (CN2H2) and Ga2O3 as precursors. The structural properties were investigated in detail. It is found that these nanoparticles having average size of 40Â nm were N-deficient with the N vacancies reaching as high as 12%. The Raman scattering spectrum of these nanoparticles presented some interesting features. The room-temperature frequency spectrum of the relative dielectric constant Ér was measured and indicated that these nanoparticles exhibited sharp enhancement at low frequency range comparing with GaN nanomaterials and N-deficient microparticles. It is thought both the rotation direction polarization (RDP) and the space charge polarization (SCP) process should be responsible for the enhancement of Ér in these N-deficient GaN nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 6, 1 January 2009, Pages 3843-3847
Journal: Applied Surface Science - Volume 255, Issue 6, 1 January 2009, Pages 3843-3847
نویسندگان
P.G. Li, M. Lei, Y.X. Du, X. Guo, W.H. Tang,