10.1021/ja040082h.s001 Xiaoyou Xu Xiaoyou Xu Robert Ray Robert Ray Yunlong Gu Yunlong Gu Harry J. Ploehn Harry J. Ploehn Latha Gearheart Latha Gearheart Kyle Raker Kyle Raker Walter A. Scrivens Walter A. Scrivens Electrophoretic Analysis and Purification of Fluorescent Single-Walled Carbon Nanotube Fragments American Chemical Society 2004 agarose gel tubule carbon species promise impurity Electrophoretic Analysis glass bead matrixes 2004-10-13 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Electrophoretic_Analysis_and_Purification_of_Fluorescent_Single_Walled_Carbon_Nanotube_Fragments/3321013 Arc-synthesized single-walled carbon nanotubes have been purified through preparative electrophoresis in agarose gel and glass bead matrixes. Two major impurities were isolated:  fluorescent carbon and short tubular carbon. Analysis of these two classes of impurities was done. The methods described may be readily extended to the separation of other water-soluble nanoparticles. The separated fluorescent carbon and short tubule carbon species promise to be interesting nanomaterials in their own right.