Kadria-Vili, YaraCanning, GriffinBachilo, Sergei M.Weisman, R. Bruce2014-11-062014-11-062014Kadria-Vili, Yara, Canning, Griffin, Bachilo, Sergei M., et al.. "High Precision Fractionator for use with Density Gradient Ultracentrifugation." <i>Analytical Chemistry,</i> (2014) American Chemical Society: http://dx.doi.org/10.1021/ac502365w.https://hdl.handle.net/1911/78033The recent application of density gradient ultracentrifugation (DGU) for structural sorting of single-walled carbon nanotube samples has created a need for highly selective extraction of closely spaced layers formed in the centrifuged tube. We describe a novel computer-controlled device designed for this purpose. Through the use of fine needles, systematic needle motions, and slow flow rates, multiple sample layers can be aspirated under program control with minimal cross contamination between layers. The fractionator’s performance is illustrated with DGU-sorted samples of single-walled carbon nanotubes.engThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.Journal articlehttp://dx.doi.org/10.1021/ac502365w