کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7920363 | 1511489 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low energy ion irradiation studies of fullerene C70 thin films - An emphasis on mapping the local structure modifications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Metal matrix composites have a diverse range of applications. We have probed local structural modifications taking fullerene C70 as a model matrix material. In this study, thin films of fullerene C70 were grown on polished silicon and quartz substrates by resistive heating of fullerene C70. In order to understand local structural changes, these semi-crystalline films were irradiated with 120â¯keVâ¯N+ ions at different fluences ranging from 1â¯Ãâ¯1013 to 3â¯Ãâ¯1016 ions.cmâ2. Microscopic analysis shows an increase in topological roughness up to a fluence of 1â¯Ãâ¯1015 ions.cmâ2 and then a decrease. The size of the particles decreases with increase in the fluence. Various spectroscopic analyses conducted on differently irradiated fullerene C70 films show that the bandgap decreases with the increase in the fluence which will increase the conductivity of the irradiated thin films. These results are proved by I-V measurements showing the decrease in the resistivity at higher fluences. Therefore, this characteristic trait makes fullerene C70 to be used as a prominent matrix component in the composites. Raman spectroscopic investigations reveal that C70 is completely transformed into amorphous carbon at a fluence of 3â¯Ãâ¯1016 ions.cmâ2. Different vibrational modes in FT-IR are also reported in the present work.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 117, June 2018, Pages 204-214
Journal: Journal of Physics and Chemistry of Solids - Volume 117, June 2018, Pages 204-214
نویسندگان
Rahul Singhal, Jyotsna Bhardwaj, Ritu Vishnoi, S. Aggarwal, Ganesh D. Sharma, J.C. Pivin,