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Self-organized two-dimensional onions
Ren, Shenqiang Briber, Robert M. Wuttig, Manfred
Ren, Shenqiang
Briber, Robert M.
Wuttig, Manfred
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Abstract
Spontaneously self-assembled onion-type nanostructures based on block copolymers as templating materials are reported. Polystyrene-poly(ethylene oxide) diblock copolymer containing CoFe2O4 and Pb1.1(Zr0.53Ti0.47)O3 precursors segregated to the two microdomains forms well-ordered templated lamellar structures. Onion-type nanostructures have been induced by room temperature solvent annealing for 64 h in a magnetic field of 0.8 T oriented perpendicularly to the plane of film. The recorded images suggest that the Lorentz force acting on charges in the paraelectric precursor induces a circular component of the diffusion flux that leads to the onion formation. This templating process opens a route for nanometer-scale patterning of magnetic toroids.
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This is the publisher's version, also available electronically from http://scitation.aip.org/content/aip/journal/apl/94/11/10.1063/1.3101373.
Date
2009-03-19
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American Institute of Physics
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Ren, Shenqiang; Briber, Robert M.; Wuttig, Manfred. (2009). "Self-organized two-dimensional onions." Applied Physics Letters, 94(11):113507. http://dx.doi.org/10.1063/1.3101373