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Issue 5, 2013
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A simple solution for the determination of pristine carbon nanotube concentration

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Abstract

Upon dispersant-assisted exfoliation, pristine carbon nanotubes (CNTs) are divided between the supernatant and precipitate, which makes the determination of dispersant concentration a challenging task. We have developed a thermogravimetric-spectroscopy-based approach to accurately determine the dispersant-assisted CNT (or nanoparticles, in general) concentration in dispersion. A thermogravimetric analysis of the filtered and washed precipitate, that is usually discarded after centrifugation, is used here to accurately calculate the CNT mass in the precipitate and (through mass-balance) its mass in the supernatant. Once the true CNT concentration has been determined, a conventional spectroscopy-based concentration calibration plot is constructed for simple and swift use in further concentration measurements. Such true concentration analysis is crucial for studying the concentration–property relationship.

Graphical abstract: A simple solution for the determination of pristine carbon nanotube concentration

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Publication details

The article was received on 27 Sep 2012, accepted on 04 Jan 2013 and first published on 07 Jan 2013


Article type: Paper
DOI: 10.1039/C2AN36399B
Analyst, 2013,138, 1490-1496

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    A simple solution for the determination of pristine carbon nanotube concentration

    M. Shtein, I. Pri-bar and O. Regev, Analyst, 2013, 138, 1490
    DOI: 10.1039/C2AN36399B

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