Adsorption of sodium dodecylsulfate on single-walled carbon nanotubes characterised using small-angle neutron scattering

Emma Kastrisianaki-Guyton, Lichun Chen, Sarah Rogers, Terence Cosgrove, Jeroen Van Duijneveldt

Research output: Contribution to journalArticle (Academic Journal)peer-review

12 Citations (Scopus)
171 Downloads (Pure)

Abstract

Aqueous dispersions of single-walled carbon nanotubes are often made using sodium dodecylsulfate (SDS), which adsorbs to the nanotube surface to stabilise them. Despite SDS being commonly used with single-walled carbon nanotubes, there is no consensus on the structure of the adsorbed layer. Small-angle neutron and X-ray scattering results reported here show that the data can be fitted to a relatively simple core-shell cylinder model, consistent with a polydisperse nanotube core of radius 10 ˚A, surrounded by an adsorbed surfactant layer of thickness 18 ˚A and volume fraction of 0.5. This is consistent with small nanotube bundles surrounded by an adsorbed layer of extended SDS molecules.
Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Colloid and Interface Science
Volume472
Early online date14 Mar 2016
DOIs
Publication statusPublished - 15 Jun 2016

Keywords

  • Small-angle neutron scattering
  • SANS
  • Single-walled carbon nanotubes
  • SWCNTs
  • Adsorption
  • Sodium dodecylsulfate
  • SDS

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