Printed Thin Diblock Copolymer Films with Dense Magnetic NanostructureClick to copy article linkArticle link copied!
- Senlin XiaSenlin XiaTechnische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, GermanyMore by Senlin Xia
- Lin SongLin SongInstitute of Flexible Electronics, Northwestern Polytechnical University, West Youyi Road 127, 710072, Xi’an, Shanxi ChinaTechnische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, GermanyMore by Lin Song
- Wei ChenWei ChenTechnische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, GermanyMore by Wei Chen
- Volker KörstgensVolker KörstgensTechnische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, GermanyMore by Volker Körstgens
- Matthias OpelMatthias OpelWalther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Str. 8, 85748 Garching, GermanyMore by Matthias Opel
- Matthias SchwartzkopfMatthias SchwartzkopfDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22603 Hamburg, GermanyMore by Matthias Schwartzkopf
- Stephan V. RothStephan V. RothDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22603 Hamburg, GermanyKTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Teknikringen 56-58, SE-100 44 Stockholm, SwedenMore by Stephan V. Roth
- Peter Müller-Buschbaum*Peter Müller-Buschbaum*E-mail: [email protected]Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, GermanyHeinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, GermanyMore by Peter Müller-Buschbaum
Abstract
Thin hybrid films with dense magnetic structures for sensor applications are printed using diblock copolymer (DBC) templating magnetic nanoparticles (MNPs). To achieve a high-density magnetic structure, the printing ink is prepared by mixing polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) with a large PS volume fraction and PS selective MNPs. Solvent vapor annealing is applied to generate a parallel cylindrical film morphology (with respect to the substrate), in which the MNP-residing PS domains are well separated by the PMMA matrix, and thus, the formation of large MNP agglomerates is avoided. Moreover, the morphologies of the printed thin films are determined as a function of the MNP concentration with real and reciprocal space characterization techniques. The PS domains are found to be saturated with MNPs at 1 wt %, at which the structural order of the hybrid films reaches a maximum within the studied range of MNP concentration. As a beneficial aspect, the MNP loading improves the morphological order of the thin DBC films. The dense magnetic structure endows the thin films with a faster superparamagnetic responsive behavior, as compared to thick films where identical MNPs are used, but dispersed inside the minority domains of the DBC.
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