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A Micellar Approach to Magnetic Ultrahigh‐Density Data‐Storage Media: Extending the Limits of Current Colloidal Methods
Author(s) -
Ethirajan A.,
Wiedwald U.,
Boyen H.G.,
Kern B.,
Han L.,
Klimmer A.,
Weigl F.,
Kästle G.,
Ziemann P.,
Fauth K.,
Cai J.,
Behm R. J.,
Romanyuk A.,
Oelhafen P.,
Walther P.,
Biskupek J.,
Kaiser U.
Publication year - 2007
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.200601759
Subject(s) - nanoreactor , materials science , micelle , polystyrene , colloid , nanotechnology , substrate (aquarium) , nanoparticle , salt (chemistry) , patterned media , ferromagnetism , chemical engineering , copolymer , composite material , organic chemistry , polymer , condensed matter physics , chemistry , oceanography , physics , geology , aqueous solution , engineering , grain size
An alternative route for producing L 1 0 FePt nanoparticles based on the self‐organization of diblock copolymers into spherical micelles is presented. It overcomes all of the drawbacks of current colloidal strategies towards densely packed arrays of ferromagnetic FePt nanoparticles while still guaranteeing areal densities exceeding 1 Tbits inch –2 . The figure shows a sketch of the metal‐salt‐loaded micelles deposited on a substrate: a polystyrene shell (red) covers the poly(2‐vinylpyridine) core (blue) forming a nanoreactor loaded with metal salt (yellow).