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Fast and Cost‐Effective Purification of Gold Nanoparticles in the 20–250 nm Size Range by Continuous Density Gradient Centrifugation
Author(s) -
Steinigeweg Dennis,
Schütz Max,
Salehi Mohammad,
Schlücker Sebastian
Publication year - 2011
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201100663
Subject(s) - dispersity , particle size , range (aeronautics) , colloid , colloidal gold , nanoparticle , resolution (logic) , centrifugation , nanotechnology , materials science , particle (ecology) , computer science , analytical chemistry (journal) , chemistry , chromatography , polymer chemistry , organic chemistry , oceanography , artificial intelligence , geology , composite material
A multilayer quasi‐continuous density gradient centrifugation method for separating 20–250 nm metal colloids with high size resolution while maintaining particle stability is presented. Colloidal mixtures containing monodisperse gold nanospheres and clusters thereof, in particular, gold dimers, are purified with yields up to 94%. The rapid method uses standard laboratory equipment.