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Time‐Resolved In Situ Synchrotron X‐ray Study and Large‐Scale Production of Magnetite Nanoparticles in Supercritical Water
Author(s) -
Bremholm Martin,
Felicissimo Marcella,
Iversen Bo B.
Publication year - 2009
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.200901048
Subject(s) - magnetite , supercritical fluid , synchrotron , nucleation , materials science , synchrotron radiation , nanoparticle , chemical engineering , superparamagnetism , phase (matter) , in situ , magnetite nanoparticles , analytical chemistry (journal) , magnetic nanoparticles , nanotechnology , chemistry , magnetic field , optics , thermodynamics , metallurgy , chromatography , physics , magnetization , engineering , organic chemistry , quantum mechanics
A general solution : In situ synchrotron X‐ray scattering in a high‐pressure pulsed injection reactor (see picture) shows that magnetite nucleation and growth are temporally separated. Gram‐scale crystalline, pure phase, superparamagnetic magnetite nanoparticles were synthesized without surfactants in supercritical water in less than one hour using a laboratory‐scale continuous‐flow reactor.