Dynamic Self-Assembly of Magnetic/Polymer Composites in Rotating Frames of Reference

Konrad Giżynski; Taehoon Lee; Bartosz A Grzybowski

doi:10.1002/adma.201700614

Dynamic Self-Assembly of Magnetic/Polymer Composites in Rotating Frames of Reference

Adv Mater. 2017 Sep;29(33). doi: 10.1002/adma.201700614. Epub 2017 Jun 22.

Authors

Konrad Giżynski^{1

2}, Taehoon Lee^{1

2}, Bartosz A Grzybowski^{1

2}

Affiliations

¹ IBS Center for Soft and Living Matter, UNIST-gil 50, Eonyang-eup, Ulju-gun, Ulsan, 689-798, Republic of Korea.
² Department of Chemistry, UNIST, UNIST-gil 50, Eonyang-eup, Ulju-gun, Ulsan, 689-798, Republic of Korea.

PMID: 28640536
DOI: 10.1002/adma.201700614

Abstract

Small ferromagnetic particles suspended in a rotating viscous polymer and subjected to an external static magnetic field dynamically self-assemble into open-lattice, periodic structures. Depending on the orientation of the magnetic field with respect to the system's axis of rotation, these structures range from arrays of parallel plates to single, double, triple, or even quaternary helices. Dynamic self-assembly in this rotating frame of reference can be explained by an interplay between magnetic, dipole-dipole, viscous drag, and centripetal forces. Once formed, the dynamic aggregates can be made permanent by thermally curing the polymer matrix.

Keywords: dynamic self-assembly; magnetics; polymers; rotating frame.