کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1684572 | 1518764 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical properties tailoring by high fluence implantation of Ag ions on sapphire
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
Optical and structural properties of single crystalline α-Al2O3 were changed by the implantation of high fluences of Ag ions. Colourless transparent (101¯0) sapphire samples were implanted at room temperature with 160 keV silver ions and fluences up to 1 Ã 1017 Ag cmâ2. Surface amorphization is observed at the fluence of 6 Ã 1016 Ag cmâ2. Except for the lower fluences (below 6 Ã 1016 Ag cmâ2) the optical absorption spectra reveal the presence of a band peaking in the region 450-500 nm, depending on the retained fluence. This band has been attributed to the presence of silver colloids, being thus 1 Ã 1016 Ag cmâ2 below the threshold for colloid formation during the implantation. Annealing in oxidizing atmosphere promotes the recrystallization along with segregation of Ag followed by loss through evaporation. Recrystallization is retarded for annealing in reducing atmosphere and the Ag profile displays now a double peak structure after evaporation. Playing with the implantation fluence, temperature and annealing atmosphere controllable shifts of the position and intensity of the optical bands in the visible were achieved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 242, Issues 1â2, January 2006, Pages 104-108
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 242, Issues 1â2, January 2006, Pages 104-108
نویسندگان
C. Marques, R.C. da Silva, A. Wemans, M.J.P. Maneira, A. Kozanecki, E. Alves,