Nanoscale analysis of laser-induced surface relief gratings on azo-copolyimide films before and after gold coating
| Autor: | Nicoleta Lupu, Valentin Pohoata, Ion Sava, George Stoian, Iuliana Stoica, Ilarion Mihaila, Ionut Topala |
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| Rok vydání: | 2018 |
| Předmět: |
Nanostructure
Materials science Polymers and Plastics Scanning electron microscope 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Metal chemistry.chemical_compound law Nanoscopic scale Deposition (law) business.industry Organic Chemistry 021001 nanoscience & nanotechnology Laser 0104 chemical sciences Characterization (materials science) Azobenzene chemistry visual_art visual_art.visual_art_medium Optoelectronics 0210 nano-technology business |
| Zdroj: | Polymer Testing. 72:407-415 |
| ISSN: | 0142-9418 |
| DOI: | 10.1016/j.polymertesting.2018.10.033 |
| Popis: | Free-standing, transparent, flexible films of aromatic azo-copolyimides based on benzophenonetetracarboxylic dianhydride and a mixture of 2,2-bis{3-amino-4-[(p-oxyalkyloxy–p’-methyl) azobenzene]-phenylene}-hexafluoropropane (0.25mol) and 4,4‘-diamino-3,3‘dimethyldiphenylmethane (0.75mol) were studied with regard to their nanostructuring capacity and their ability to bear a load. Uniform and orientated surface relief gratings were obtained irrespective of pulses number (10 or 100), using a laser field with an energy density of 45 mJ/cm2. For the targeted applications, such as metallic reflective gratings, preliminary gold deposition tests were performed on the resulting nanostructures, gold being preferred due to its high optical performance. Atomic force microscopy and high-resolution scanning electron microscopy were used for complex characterization of the resulted structured surfaces, before and after gold coating. |
| Databáze: | OpenAIRE |
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