کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5362834 | 1388293 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoluminescence and optical properties of He ion bombarded ultra-high molecular weight polyethylene
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Photoluminescence and optical properties of He ion bombarded ultra-high molecular weight polyethylene Photoluminescence and optical properties of He ion bombarded ultra-high molecular weight polyethylene](/preview/png/5362834.png)
چکیده انگلیسی
Ion bombardment is a suitable tool to improve the physical and chemical properties of polymer surface. In this study UHMWPE samples were bombarded with 130Â keV He ions to the fluences ranging from 1Â ÃÂ 1012 to 1Â ÃÂ 1016Â cmâ2. The untreated and ion beam modified samples were investigated by photoluminescence, and ultraviolet-visible (UV-vis) spectroscopy. Remarkable decrease in integrated luminescence intensity with increasing ion fluences was observed. The reduction in PL intensity with increase of ion fluence might be attributed to degradation of polymer surface and formation of defects. The effect of ion fluence on the optical properties of the bombarded surfaces was characterized. The values of the optical band gap Eg, and activation energy Ea were determined from the optical absorption. The width of the tail of the localized states in the band gap (Ea) was evaluated using the Urbach edge method. With increasing ion fluences a decrease in both the energy gap and the activation energy were observed. Increase in the numbers of carbon atoms (N) in a formed cluster with increasing the He ion fluence was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 9, 15 February 2009, Pages 5016-5020
Journal: Applied Surface Science - Volume 255, Issue 9, 15 February 2009, Pages 5016-5020
نویسندگان
A.M. Abdul-Kader,