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Size‐Dependent Magnetic Properties of Colloidal Mn 3 O 4 and MnO Nanoparticles
Author(s) -
Seo Won Seok,
Jo Hyong Hoon,
Lee Kwangyeol,
Kim Bongsoo,
Oh Sang Jun,
Park Joon T.
Publication year - 2004
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.200352400
Subject(s) - oleylamine , thermal decomposition , nanoparticle , dispersity , particle size , manganese , inert gas , decomposition , atmosphere (unit) , colloid , materials science , chemical engineering , nanotechnology , chemistry , physics , organic chemistry , polymer chemistry , thermodynamics , metallurgy , engineering
Highly crystalline and monodisperse MnO and Mn 3 O 4 nanoparticles are prepared by thermal decomposition of [Mn(acac) 2 ] in oleylamine under an inert atmosphere in the presence and absence of a small amount of water, respectively (see picture). The particle size of both manganese oxide systems can be easily manipulated by changing the employed reaction temperature, and it has been demonstrated that the magnetic behavior depends on the size of the particles.