Colloidal synthesis and characterization of tetrapod-shaped magnetic nanocrystals.
Tetrapod-shaped maghemite nanocrystals are synthesized by manipulating the decomposition of iron pentacarbonyl in a ternary surfactant mixture under mild thermal conditions. Adjustment of the reaction parameters allows for the systematic tuning of both the width and the length of the tetrapod arms, which grow preferentially along the 111 easy axis direction. Such degree of control leads to modulation of the magnetic behavior of the nanocrystals, which evolves systematically as their surface magnetization phase and shape anisotropy are progressively increased.
Cozzoli
P Davide
PD
National Nanotechnology Laboratory of CNR-INFM, Unità di Ricerca IIT, Distretto Tecnologico ISUFI, via per Arnesano km 5, 73100 Lecce, Italy. davide.cozzoli@unile.it
Snoeck
Etienne
E
Garcia
Miguel Angel
MA
Giannini
Cinzia
C
Guagliardi
Antonietta
A
Cervellino
Antonio
A
Gozzo
Fabia
F
Hernando
Antonio
A
Achterhold
Klaus
K
Ciobanu
Nelica
N
Parak
Fritz G
FG
Cingolani
Roberto
R
Manna
Liberato
L
D016880:Anisotropy; D003102:Colloids / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D005290:Ferric Compounds / Q000737:chemistry*; D054354:Iron Carbonyl Compounds; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009942:Organometallic Compounds / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
D003102:Colloids; D005290:Ferric Compounds; D009942:Organometallic Compounds; D054354:Iron Carbonyl Compounds; C000499:ferric oxide