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Colloidal Crystals of Monodisperse FePt Nanoparticles Grown by a Three‐Layer Technique of Controlled Oversaturation
Author(s) -
Shevchenko E.,
Talapin D.,
Kornowski A.,
Wiekhorst F.,
Kötzler J.,
Haase M.,
Rogach A.,
Weller H.
Publication year - 2002
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 - 10.1002/1521-4095(20020219)14:4<287::aid-adma287>3.0.co;2-6
Subject(s) - materials science , dispersity , superparamagnetism , nanocrystal , nanoparticle , superlattice , ferromagnetism , colloid , layer (electronics) , hexagonal crystal system , nanotechnology , chemical engineering , colloidal crystal , layer by layer , condensed matter physics , crystallography , magnetization , optoelectronics , polymer chemistry , chemistry , physics , quantum mechanics , magnetic field , engineering
Colloidal crystals of FePt nanocrystals have been produced by a three‐layer oversaturation technique. Faceted triangular and hexagonal platelets, pyramids, and tetrahedrons have been obtained (see Figure), consisting of individual monodisperse FePt nanocrystals aligned in a 3D superlattice. Transition from superparamagnetic to ferromagnetic behavior is observed at 14 K.