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Issue 8, 2011
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Highly efficient electroosmotic flow through functionalized carbon nanotube membranes

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Abstract

Carbon nanotube membranes with inner diameter ranging from 1.5–7 nm were examined for enhanced electroosmotic flow. After functionalization via electrochemical diazonium grafting and carbodiimide coupling reaction, it was found that neutral caffeine molecules can be efficiently pumped via electroosmosis. An electroosmotic velocity as high as 0.16 cm s−1 V−1 has been observed. Power efficiencies were 25–110 fold improved compared to related nanoporous materials, which has important applications in chemical separations and compact medical devices. Nearly ideal electroosmotic flow was seen in the case where the mobile cation diameter nearly matched the inner diameter of the single-walled carbon nanotube resulting in a condition of using one ion is to pump one neutral molecule at equivalent concentrations.

Graphical abstract: Highly efficient electroosmotic flow through functionalized carbon nanotube membranes

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Publication details

The article was received on 22 Mar 2011, accepted on 16 May 2011 and first published on 05 Jul 2011


Article type: Paper
DOI: 10.1039/C1NR10303B
Citation: Nanoscale, 2011,3, 3321-3328
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    Highly efficient electroosmotic flow through functionalized carbon nanotube membranes

    J. Wu, K. Gerstandt, M. Majumder, X. Zhan and B. J. Hinds, Nanoscale, 2011, 3, 3321
    DOI: 10.1039/C1NR10303B

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