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TitleSelective purification of multiwalled carbon nanotubes by dielectrophoresis within a large array
Publication TypeJournal Article
Year of Publication2006
AuthorsLiu, X., Spencer J.L., Kaiser A.B., and Arnold W.M.
JournalCurrent Applied Physics
Pagination427 - 431
Date Published2006
ISSN15671739 (ISSN)
KeywordsCarbon nanotubes, Dielectrophoresis, Electric parameters, Electric potential, Electrodes, Electrophoresis, Interdigitated electrodes (IDE), Multiwalled carbon nanotubes (MWCNT), purification, Raman spectroscopy, Scanning electron microscopy
AbstractA prototype device was made to scale up a method for the wet purification of multiwalled carbon nanotubes (MWCNTs). The device consists of a fluid-flow chamber, which facilitates the flow of MWCNT suspensions across a large array of interdigitated electrodes (IDEs). A radio-frequency voltage provides the electric field for dielectrophoresis. Electric parameters of the array were monitored during the running of the process and were observed to reflect the increase of conductance caused by accumulation of MWCNTs. SEM and Raman spectroscopy showed a decrease in the D-band to G-band ratio for the material accumulated on the array. © 2005 Elsevier B.V. All rights reserved.

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