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Self-Assembly of Large Magnetic Nanoparticles in Ultrahigh Molecular Weight Linear Diblock Copolymer Films

Cao, Wei (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
Xia, Senlin (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
Jiang, Xinyu (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
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Appold, Michael (author)
Tech Univ Darmstadt, Ernst Berl Inst Tech & Macromol Chem, D-64287 Darmstadt, Germany.
Opel, Matthias (author)
Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany.
Plank, Martina (author)
Tech Univ Darmstadt, Ernst Berl Inst Tech & Macromol Chem, D-64287 Darmstadt, Germany.
Schaffrinna, Roy (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
Kreuzer, Lucas P. (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
Yin, Shanshan (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.
Gallei, Markus (author)
Saarland Univ, Chair Polymer Chem, D-66123 Saarbrucken, Germany.
Schwartzkopf, Matthias (author)
Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
Roth, Stephan V. (author)
KTH,Fiber- och polymerteknologi
Mueller-Buschbaurn, Peter (author)
Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany.;Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, D-85748 Garching, Germany.
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Tech Univ Munich, Lehrstuhl Funkt Mat, Phys Dept, D-85748 Garching, Germany Tech Univ Darmstadt, Ernst Berl Inst Tech & Macromol Chem, D-64287 Darmstadt, Germany. (creator_code:org_t)
2020-01-22
2020
English.
In: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 12:6, s. 7557-7564
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The development of diblock copolymer (DBC) nanocomposite films containing magnetic nanoparticles (NPs) with diameters (D) over 20 nm is a challenging task. To host large iron oxide NPs (Fe3O4, D = 27 +/- 0.6 nm), an ultrahigh molecular weight (UHMW) linear DBC polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) is used as a template in the present work. Due to hydrogen bonding between the carboxylic acid ligands of the NPs and the ester groups in PMMA, the NPs show an affinity to the PMMA block. The localization of the NPs inside the DBC is investigated as a function of the NP concentration. At low NP concentrations, NPs are located preferentially at the interface between PS and PMMA domains to minimize the interfacial tension caused by the strong segregation strength of the UHMW DBC. At high NP concentrations (>= 10 wt %), chain-like NP aggregates (a head-to-tail orientation) are observed in the PMMA domains, resulting in a change of the morphology from sphere to ellipsoid for part of the PMMA domains. Magnetic properties of the hybrid films are probed via superconducting quantum interference device magnetometry. All hybrid films show ferrimagnetism and are promising for potential applications in magnetic data storage.

Subject headings

NATURVETENSKAP  -- Kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Keyword

large iron oxide nanoparticles
ultrahigh molecular weight linear diblock copolymer
localization of NPs
GISAXS
ferrimagnetic behavior

Publication and Content Type

ref (subject category)
art (subject category)

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