Self-organized two-dimensional onions | Zendy

Shenqiang Ren | Zendy; Robert M. Briber | Zendy; Manfred Wuttig | Zendy

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Self-organized two-dimensional onions

Author(s) -

Shenqiang Ren,

Robert M. Briber,

Manfred Wuttig

Publication year - 2009

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3101373

Subject(s) - lamellar structure , materials science , annealing (glass) , nanostructure , copolymer , polystyrene , self assembly , nanometre , nanotechnology , perpendicular , ethylene oxide , chemical engineering , chemical physics , polymer chemistry , polymer , composite material , chemistry , geometry , mathematics , engineering

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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