Premium
Magnetically Driven Janus Micro‐Ellipsoids Realized via Asymmetric Gathering of the Magnetic Charge
Author(s) -
Güell Oriol,
Sagués Francesc,
Tierno Pietro
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201100902
Subject(s) - materials science , superparamagnetism , paramagnetism , janus , magnetic field , ellipsoid , condensed matter physics , janus particles , particle (ecology) , magnetic anisotropy , magnetic nanoparticles , nanoscopic scale , anisotropy , nanotechnology , magnetic moment , composite material , magnetization , nanoparticle , optics , physics , oceanography , quantum mechanics , astronomy , geology
A simple and general method to realize Janus paramagnetic micro‐ellipsoids is demonstrated . We elongate liquefied spherical paramagnetic particles embedded in a thermoplastic thin film upon application of a mechanical stress and gather the magnetic doping of the particles by using an external high magnetic field gradient. The asymmetric location of the nanoscale superparamagnetic grains inside the anisotropic particles is confirmed by TEM, and by following the particle dynamics under a rotating magnetic field.