کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10638229 | 995413 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fourier-transform infrared and UV-vis spectroscopes of nickel phthalocyanine thin films
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The Fourier-transform infrared (FT-IR) technique has been applied to identify the polymorphs of phthalocyanine molecules. The infrared absorption (IR) spectra were recorded in the spectral range 400-1000 cmâ1. A comparison of absorption spectra of powder, as-deposited and annealed films is presented. The powder absorption spectrum was identified as rich of β-NiPc, where the thermally deposited films at room temperature were identified as the rich of α-NiPc. Moreover, the main spectral peaks of the films, annealed at 573 K, were defined as rich of β-form. The absorption measurements recorded in the UV-vis region showed two well-defined absorption bands of phthalocyanine molecule, namely the Soret band (B) and the Q-band. The Q-band showed its characteristic splitting (Davydov splitting), and ÎQ was obtained as 0.21 eV. Some of the important optical absorption parameters such as the molar extinction coefficient, the oscillator strength, and the electric dipole strength have been evaluated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 92, Issue 1, 15 July 2005, Pages 185-189
Journal: Materials Chemistry and Physics - Volume 92, Issue 1, 15 July 2005, Pages 185-189
نویسندگان
M.M. El-Nahass, K.F. Abd-El-Rahman, A.A.A. Darwish,