Dispersing individual single-wall carbon nanotubes in aqueous surfactant solutions below the cmc

Panagiotis Angelikopoulos; Andrei Gromov; Ailsa Leen; Oleg Nerushev; Henry Bock; Eleanor E.B. Campbell

doi:10.1021/jp905925r

Dispersing individual single-wall carbon nanotubes in aqueous surfactant solutions below the cmc

Panagiotis Angelikopoulos, Andrei Gromov, Ailsa Leen, Oleg Nerushev, Henry Bock, Eleanor E.B. Campbell

Department of Physics

Research output: Contribution to journal › Article › peer-review

70 Scopus citations

Abstract

Dispersions of single-wall carbon nanotubes (SWCNTs) in surfactant solutions below the critical micelle concentration (cmc) have been studied theoretically and experimentally. Dissipative particle dynamics (DPD) simulations of a coarse-grained model predict that surfactant adsorption on small diameter tubes is dominated by aggregation of the surfactant molecules into adsorbed micelles at C ≈ 0.3C_cmc. We also find that the surfactant adsorption is nearly complete at a concentration of around C ≈ 0.5C_cmc. Further increase of the surfactant concentration has only minor effects on the radial density of surfactant headgroups, indicating that SWCNT may be fully stabilized in solutions below the cmc. SWCNT dispersions in solutions of anionic surfactants sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) below the cmc show a significant fraction of dispersed individual tubes and small bundles, in agreement with the model calculations.

Original language	English
Pages (from-to)	2-9
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	1
DOIs	https://doi.org/10.1021/jp905925r
State	Published - 14 Jan 2010

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abstract = "Dispersions of single-wall carbon nanotubes (SWCNTs) in surfactant solutions below the critical micelle concentration (cmc) have been studied theoretically and experimentally. Dissipative particle dynamics (DPD) simulations of a coarse-grained model predict that surfactant adsorption on small diameter tubes is dominated by aggregation of the surfactant molecules into adsorbed micelles at C ≈ 0.3Ccmc. We also find that the surfactant adsorption is nearly complete at a concentration of around C ≈ 0.5Ccmc. Further increase of the surfactant concentration has only minor effects on the radial density of surfactant headgroups, indicating that SWCNT may be fully stabilized in solutions below the cmc. SWCNT dispersions in solutions of anionic surfactants sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) below the cmc show a significant fraction of dispersed individual tubes and small bundles, in agreement with the model calculations.",

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AU - Angelikopoulos, Panagiotis

AU - Gromov, Andrei

AU - Leen, Ailsa

AU - Nerushev, Oleg

AU - Bock, Henry

AU - Campbell, Eleanor E.B.

PY - 2010/1/14

Y1 - 2010/1/14

N2 - Dispersions of single-wall carbon nanotubes (SWCNTs) in surfactant solutions below the critical micelle concentration (cmc) have been studied theoretically and experimentally. Dissipative particle dynamics (DPD) simulations of a coarse-grained model predict that surfactant adsorption on small diameter tubes is dominated by aggregation of the surfactant molecules into adsorbed micelles at C ≈ 0.3Ccmc. We also find that the surfactant adsorption is nearly complete at a concentration of around C ≈ 0.5Ccmc. Further increase of the surfactant concentration has only minor effects on the radial density of surfactant headgroups, indicating that SWCNT may be fully stabilized in solutions below the cmc. SWCNT dispersions in solutions of anionic surfactants sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) below the cmc show a significant fraction of dispersed individual tubes and small bundles, in agreement with the model calculations.

AB - Dispersions of single-wall carbon nanotubes (SWCNTs) in surfactant solutions below the critical micelle concentration (cmc) have been studied theoretically and experimentally. Dissipative particle dynamics (DPD) simulations of a coarse-grained model predict that surfactant adsorption on small diameter tubes is dominated by aggregation of the surfactant molecules into adsorbed micelles at C ≈ 0.3Ccmc. We also find that the surfactant adsorption is nearly complete at a concentration of around C ≈ 0.5Ccmc. Further increase of the surfactant concentration has only minor effects on the radial density of surfactant headgroups, indicating that SWCNT may be fully stabilized in solutions below the cmc. SWCNT dispersions in solutions of anionic surfactants sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) below the cmc show a significant fraction of dispersed individual tubes and small bundles, in agreement with the model calculations.

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Dispersing individual single-wall carbon nanotubes in aqueous surfactant solutions below the cmc

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