Dispersing Individual Single-Wall Carbon Nanotubes in Aqueous Surfactant Solutions below the cmc

被引：69

作者：

Angelikopoulos, Panagiotis ^{[2
]}

Gromov, Andrei ^{[1
]}

Leen, Ailsa ^{[1
,3
]}

Nerushev, Oleg ^{[1
]}

Bock, Henry ^{[2
]}

Campbell, Eleanor E. B. ^{[1
,4
]}

机构：

[1] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

[2] Heriot Watt Univ, Dept Chem Engn, Edinburgh EH14 4AS, Midlothian, Scotland

[3] Mary Erskine Sch, Edinburgh EH4 3NT, Midlothian, Scotland

[4] Konkuk Univ, Div Quantum Phases & Devices, Seoul 143701, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

ELECTRONIC-PROPERTIES; THERMAL-CONDUCTIVITY; LARGE POPULATIONS; SOLUBILIZATION; FUNCTIONALIZATION; ADSORPTION; SEPARATION; DIAMETER; SIDEWALL; PURIFICATION;

D O I：

10.1021/jp905925r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 approximate to 0.3C(cmc). We also find that the surfactant adsorption is nearly complete at a concentration of around C approximate to 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.

引用

页码：2 / 9

页数：8

共 92 条

[1] Directed Self-Assembly of Surfactants in Carbon Nanotube Materials [J].