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Quasi‐Epitaxial Growth of Ni Nanoshells on Au Nanorods
Author(s) -
Grzelczak M.,
RodríguezGonzález B.,
PérezJuste J.,
LizMarzán L. M.
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.200700467
Subject(s) - nanorod , materials science , epitaxy , nanotechnology , high resolution transmission electron microscopy , platinum , aqueous solution , nickel , chemical engineering , transmission electron microscopy , catalysis , layer (electronics) , organic chemistry , chemistry , metallurgy , engineering
Magnetic nickel shells can be grown on gold nanorods with platinum tips by reduction of Ni 2+ with hydrazine in aqueous cetyl‐trimethylammonium bromide (CTAB) solution, using Pt tips as catalysts. The plasmon absorption of the starting gold nanorods can be totally quenched by the metallic layer of nickel, while the magnetic character of these anisotropic, hybrid nanocrystals is demonstrated through alignment under an external magnetic field. Quasi‐epitaxial growth is demonstrated by HRTEM and electron diffraction (see figure).