Printed Thin Magnetic Films Based on Diblock Copolymer and Magnetic Nanoparticles
| Autor: | Senlin Xia, Matthias Opel, Peter Müller-Buschbaum, Paul A. Staniec, Ezzeldin Metwalli, Eva M. Herzig |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanoparticle Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Magnetic field chemistry.chemical_compound Magnetic anisotropy chemistry Coating engineering Magnetic nanoparticles Grazing-incidence small-angle scattering General Materials Science Polystyrene Thin film 0210 nano-technology |
| Zdroj: | ACS applied materialsinterfaces. 10(3) |
| ISSN: | 1944-8252 |
| Popis: | Printing techniques have been well established for large-scale production and have developed to be effective in controlling the morphology and thickness of the film. In this work, printing is employed to fabricate magnetic thin films composed of polystyrene coated maghemite nanoparticles (γ-Fe2O3 NPs) and polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer. By applying an external magnetic field during the print coating step, oriented structures with a high content of nanoscale magnetic particles are created. The morphology of the magnetic films and the arrangement of NPs within the polymer matrix are characterized with real and reciprocal space techniques. Due to the applied magnetic field, the magnetic NPs self-assemble into microscale sized wires with controlled widths and separation distances, endowing hybrid films with a characteristic magnetic anisotropy. At the nanoscale level, due to the PS coating, the NPs disperse as single particles at low NP concentrations. The NPs self-a... |
| Databáze: | OpenAIRE |
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