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Mesoscopic Structures of Maghemite Nanocrystals: Fabrication, Magnetic Properties, and Uses
Author(s) -
Pileni MariePaule,
Ngo AnhTu
Publication year - 2005
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200400574
Subject(s) - maghemite , mesoscopic physics , nanocrystal , materials science , nanotechnology , van der waals force , magnetite , fabrication , superparamagnetism , wafer , condensed matter physics , chemical physics , nanoparticle , magnetic field , chemistry , magnetization , physics , molecule , metallurgy , quantum mechanics , medicine , alternative medicine , pathology , organic chemistry
Mesoscopic structures made of maghemite (γ‐Fe 2 O 3 ) nanocrystals with different coatings and shapes are described. They are controlled by a combination of van der Waals and magnetic dipolar interactions and their shapes are responsible for the collective magnetic response of the nanocrystals. It is shown that spherical γ‐Fe 2 O 3 nanocrystals can be used as a mask to reproduce the mesoscopic structure on a silicon wafer.