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From Hot‐Injection Synthesis to Heating‐Up Synthesis of Cobalt Nanoparticles: Observation of Kinetically Controllable Nucleation
Author(s) -
Timonen Jaakko V. I.,
Seppälä Eira T.,
Ikkala Olli,
Ras Robin H. A.
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201005600
Subject(s) - nucleation , cobalt , nanoparticle , dispersity , materials science , particle (ecology) , chemical engineering , particle size , nanotechnology , chemical physics , chemistry , metallurgy , polymer chemistry , organic chemistry , oceanography , geology , engineering
Almost equal : Particle nucleation in the widely studied hot‐injection synthesis of magnetic cobalt nanoparticles (see TEM image) was found to take place well after the injection and to be temperature‐controlled. This insight into particle nucleation led to a technologically relevant heating‐up synthesis of nearly monodisperse cobalt nanoparticles on a multigram scale. The particle size could be tuned simply by adjusting the heating rate.