Self-assembly and micellization of amphiphilic rod-coil block oligomer at the mica-water interface

Hongbo Li, Bo Song, Lidong Qin, Qingtao Liu, Lixin Wu, Jiacong Shen

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

In this paper, in situ atomic force microscopy has been used to investigate the micellization and self-assembling structure of an amphiphilic rod-coil block oligomer (EO16OPV) containing a conjugated oligo(phenylene vinylene) dimer and poly(ethylene oxide) at the mica-water interface. It is found that EO16OPV molecules have strong adsorption and aggregation properties on mica. In the wide concentration range from above the critical micelle concentration (cmc) to far below the cmc, a closely packed layer of stripe-like micelles with two preferred orientations can be formed at the mica-water interface. A cylindrical micelle structure for the stripes is proposed. We demonstrate that the stripe-like micelles formed on mica originate from different micellization processes at solution concentrations above and below the cmc. The origins of the strong micellization properties and oriented arrangement of the stripes are also discussed.

Original languageEnglish (US)
Pages (from-to)557-563
Number of pages7
JournalJournal of Colloid And Interface Science
Volume290
Issue number2
DOIs
StatePublished - Oct 15 2005

Keywords

  • Adsorption
  • Amphiphilic rod-coil block oligomer
  • Cylindrical micelles
  • In situ AFM
  • Interface
  • Micellization
  • Self-assembly

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

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