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Printed thin magnetic films based on diblock copolymer and magnetic nanoparticles

Titelangaben

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. Bd. 10 (Dezember 2017) Heft 3 . - S. 2982-2991.
ISSN 1944-8252
DOI: 10.1021/acsami.7b16971

Abstract

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.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: Article ASAP
Keywords: GISAXS; diblock copolymer; magnetic nanoparticles; printing; superparamagnetic behavior
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Juniorprofessur Experimentalphysik - Dynamik und Strukturbildung > Juniorprofessur Experimentalphysik - Dynamik und Strukturbildung - Juniorprof. Dr. Eva Maria Herzig
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Juniorprofessur Experimentalphysik - Dynamik und Strukturbildung
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 12 Jan 2018 09:57
Letzte Änderung: 26 Jan 2018 12:04
URI: https://eref.uni-bayreuth.de/id/eprint/41670