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Printed thin magnetic films based on diblock copolymer and magnetic nanoparticles

Title data

Xia, Senlin ; Metwalli, Ezzeldin ; Opel, Matthias ; Staniec, Paul A. ; Herzig, Eva M. ; Müller-Buschbaum, Peter:
Printed thin magnetic films based on diblock copolymer and magnetic nanoparticles.
In: ACS Applied Materials & Interfaces. Vol. 10 (2018) Issue 3 . - pp. 2982-2991.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.7b16971

Abstract in another language

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-assemble into nanosized clusters inside the PS domains when the NP concentration increases. Due to a high loading of uniformly dispersed magnetic NPs across the whole printed film, a strong sensitivity to an external magnetic field is achieved. The enhanced superparamagnetic property of the printed films renders them promising candidate materials for future magnetic sensor applications.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Article ASAP
Keywords: GISAXS; diblock copolymer; magnetic nanoparticles; printing; superparamagnetic behavior
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung - Juniorprof. Dr. Eva Maria Herzig
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 12 Jan 2018 09:57
Last Modified: 05 Apr 2018 08:20
URI: https://eref.uni-bayreuth.de/id/eprint/41670