کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5352503 1503593 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nanoparticles based laser-induced surface structures formation on mesoporous silicon by picosecond laser beam interaction
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Nanoparticles based laser-induced surface structures formation on mesoporous silicon by picosecond laser beam interaction
چکیده انگلیسی
In this study, laser induced periodic surface structures were formed on mesoporous silicon by irradiation of Nd:YAG picosecond pulsed laser beam at 266 nm wavelength at 1 Hz repetition rate and with 42 ps pulse duration. The effects of laser processing parameters as laser beam fluence and laser pulse number on the formation of ripples were investigated. Scanning electron microscopy and atomic force microscopy were used to image the surface morphologies and the cross section of samples after laser irradiation. At relatively low fluence ∼20 mJ/cm2, ripples with period close to the laser beam wavelength (266 nm) and with an always controlled orientation (perpendicular to the polarization of ps laser beam) appeared after a large laser pulse number of 12,000. It has been found that an initial random distribution of SiOx nanoparticles is periodically structured with an increase of the laser pulse number. Finally, it is experimentally demonstrated that we formed a 100 nm liquid phase under the protusion zones including the pores in the picosecond regime.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 374, 30 June 2016, Pages 31-35
نویسندگان
, , , , , , , ,