کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5359753 1503681 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Generation of nanoparticles at a fluence less than the ablation threshold using femtosecond laser pulses
ترجمه فارسی عنوان
تولید نانوذرات در یک فلونیزه کمتر از آستانه تخریب با استفاده از پالسهای لیزر فموتوسجد
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Femtosecond laser machining of crystalline Si in vacuum resulted in the formation of pillars and particles of ∼100 nm in size at the wall surfaces and the periphery of the ablated hole. These structures were created at a laser fluence below the ablation threshold. The nanopillars and nanoparticles appear to grow from the target surface. The target surface near the particles showed molten features with descending height, indicating significant mass transport from the surface layer to the particles. The nanopillars and nanoparticles likely formed as a result of successive crystal growth processes including amorphization of the laser-irradiated target surface, followed by crystalline nucleation, melting of the amorphous Si surrounding the crystalline particles, and liquid Si creeping over particle surfaces leading to an increase in particle size. By repeating these processes, the particles grow in cumulative laser shots. These particles are the major debris components distributed near micron-sized holes formed at the ablation threshold fluence in vacuum.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 282, 1 October 2013, Pages 638-641
نویسندگان
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