کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7993074 | 1516150 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Promising method for preparation the PVA/Ag nanocomposite and Ag nano-rods
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Both the PVA/Ag nanocomposite films and the Ag nano-rods were successfully prepared by using the γ irradiation method. The PVA/Ag nanocomposite films prepared at different γ irradiation doses (25, 50, 75 and 100 KGy). The Ag nano-rods prepared at a specific conditions at (125 KGy). For the PVA/Ag nanocomposites, the UV-Vis spectrophotometer and PL spectrophotometer were used to characterize the films. The optical absorption spectra for all samples over the wavelength range 190-800 nm were recorded. There are two absorption peaks were observed. One peak at 200 nm which attributed to (n-Ï*) transition for PVA and another peak at 427 nm for the formed Ag nanoparticles. Photoluminescence showed a peak at 646 nm and its intensity increase with increasing the γ doses. For preparing the Ag nano-rods, the SEM images of the films revealed the presence of two types of silver particles one is AgNO3 and the other Ag nanoparticles on the front surface of the (0â¯KGy) nanocomposite films. With increasing the gamma doses until 125â¯KGy the Ag nanoparticles appears on the back surface as a nano-rods. The SEM images showed that the obtained Ag nano-rod of different length: diameter (1.813â¯Î¼m: 89.125â¯nm) and (2.912â¯Î¼m: 88.851â¯nm) with aspect ratio (length: diameterâ¯=â¯16:1 to 32:1). The effect of the PVA concentration on the formation of Ag nanoparticles was confirmed by using SEM images, and we obtained that the length of Ag nano-rods on the back surface increase with increasing the PVA concentration at γ irradiation dose 125â¯KGy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 744, 5 May 2018, Pages 701-711
Journal: Journal of Alloys and Compounds - Volume 744, 5 May 2018, Pages 701-711
نویسندگان
A.G. El-Shamy, A.A. Maati, W. Attia, K.M. Abd El-Kader,