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Separation of Nanoparticles in a Density Gradient: FeCo@C and Gold Nanocrystals
Author(s) -
Sun Xiaoming,
Tabakman Scott M.,
Seo WonSeok,
Zhang Li,
Zhang Guangyu,
Sherlock Sarah,
Bai Lu,
Dai Hongjie
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.200805047
Subject(s) - colloid , suspension (topology) , nanoparticle , sedimentation , nanocrystal , density gradient , materials science , particle (ecology) , particle size , nanotechnology , crystallization , colloidal gold , phase (matter) , chemical physics , colloidal particle , chemical engineering , chemistry , physics , paleontology , oceanography , mathematics , organic chemistry , quantum mechanics , homotopy , sediment , geology , pure mathematics , engineering , biology
The right sort : A post‐synthesis, liquid‐phase separation method sorts nanoparticles by centrifugation in a medium with a density gradient. The particles are sorted according to particle size, clustering degree, and core density ρ (see picture; d =sedimentation distance). Solid–solid interactions between colloidal particles and stable phases are thus avoided. This versatile method allows for determination of the colloid size distribution in a suspension.