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. 2019 Jul 24;6(7):190241. doi: 10.1098/rsos.190241

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — Sedimentation kinetics of MWCNT suspensions dispersed by single or mixed surfactants. The abscissa is the sedimentation time elapsed (t), y indicates the ratio of the absorbance of MWCNT suspension at time t to that at the initial time.