کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
847263 | 909222 | 2016 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectroscopic and morphological studies of laser ablated silver
ترجمه فارسی عنوان
مطالعات اسپکتروسکوپی و مورفولوژیکی نقره با لیزر خرد شده
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کلمات کلیدی
تراکم تعداد الکترون، دمای الکترونی، طیف سنجی تجزیه ناشی از لیزر، امواج لیزر پالس شده، ساختار سطح، نقره،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
The spectroscopic and morphological studies of silver has been investigated after irradiation of Nd:YAG laser by employing Laser Induced Breakdown Spectroscopy (LIBS) and Scanning Electron Microscope (SEM) analyses. Silver targets were exposed to various laser fluences ranging from 5.2Â JÂ cmâ2 to 41.7Â JÂ cmâ2 under ambient environment of argon at a pressure of 100Â Torr. LIBS analysis revealed that when the laser fluence was increased from 5.2Â JÂ cmâ2 to 10.4Â JÂ cmâ2, an increasing trend for both electron temperature and electron number density of plasma was observed due to enhanced energy deposition. Afterwards, with increasing fluence from 10.4Â JÂ cmâ2 to 15.6Â JÂ cmâ2, a decreasing trend was achieved which was attributed to the shielding effect. With further increase in fluence from 15.6Â JÂ cmâ2 to a maximum value of 41.7Â JÂ cmâ2, a saturation region was achieved and insignificant changes in both plasma parameters were observed. This saturation is explainable on the basis of the formation of a self-regulating regime. SEM analysis revealed the formation of flakes and ridges on the surface of silver at the lowest fluence of 5.2Â JÂ cmâ2. For increased fluences ranging from 10.4Â JÂ cmâ2 to 41.7Â JÂ cmâ2, distinct and unorganized melted channels were the dominant features. However, at a maximum fluence of 41.7Â JÂ cmâ2, micro and nano crystallites of lamellar (tabular) shape were also formed. At peripheral ablated areas, flakes, cavities, cones and craters with multiple ablated layers were formed. The modifications in surface morphology of laser-ablated silver have been correlated with plasma parameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - International Journal for Light and Electron Optics - Volume 127, Issue 12, June 2016, Pages 5128-5134
Journal: Optik - International Journal for Light and Electron Optics - Volume 127, Issue 12, June 2016, Pages 5128-5134
نویسندگان
Ayesha Khalid, Shazia Bashir, Sohail Abdul Jalil, Mahreen Akram, Asma Hayat, Asadullah Dawood,