کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364973 | 1388323 | 2008 | 6 صفحه PDF | دانلود رایگان |
In this work we present periodic surface structures generated by linearly polarized F2 laser light (157Â nm) on polyethyleneterephthalate (PET). Atomic force microscopy was used to study the topological changes induced by the laser irradiation. The laser irradiation induces the formation of periodic ripple structures with a width of ca 130Â nm and a height of about 15Â nm in the fluence range 3.80-4.70Â mJ/cm2 and the roughness of the polymer surface increases due to the presence of these periodic structures. Subsequently, the laser modified PET foils were coated with a 50Â nm thick gold layer by sputtering. After Au deposition on the PET foils with ripple structure, the roughness of surface decreases in comparison to PET with ripples without Au coating. For 50Â nm thick Au layers, the ripple structure is not directly transferred to the gold coating, but it has an obvious effect on the grain size of the coating. With considerably thinner Au layers, the ripple structures are smoothened but preserved.
Journal: Applied Surface Science - Volume 254, Issue 11, 30 March 2008, Pages 3585-3590