Homopolymer and block copolymer brushes on gold by living anionic surface-initiated polymerization in a polar solvent

Georgios Sakellariou, Mikyoung Park, Rigoberto Advincula, Jimmy W. Mays, Nikos Hadjichristidis

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Living anionic surface-initiated polymerization on flat gold substrates has been conducted to create uniform homopolymer and diblock copolymer brushes. A 1,1-diphenylethylene (DPE) self-assembled monolayer was used as the immobilized precursor initiator. n-BuLi was used to activate the DPE in tetrahydrofuran at -78 °C to initiate the polymerization of different monomers (styrene, isoprene, ethylene oxide, and methyl methacrylate). Poly(styrene) (PS) and poly(ethylene oxide) (PEO) in particular were first investigated as grafted homopolymers, followed by their copolymers, including poly(isoprene)-b- poly(methylmethacrylate) (PI-b-PMMA). A combined approach of spectroscopic (Fourier transform infrared spectroscopy, surface plasmon spectroscopy, ellipsometry, X-ray photoelectron spectroscopy) and microscopic (atomic force microscopy) surface analysis was used to investigate the formation of the polymer brushes in polar solvent media. The chemical nature of the outermost layer of these brushes was studied by water contact angle measurements. The effect of the experimental conditions (solvent, temperature, initiator concentration) on the surface properties of the polymer brushes was also investigated.

Original languageEnglish
Pages (from-to)769-782
Number of pages14
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume44
Issue number2
DOIs
Publication statusPublished - 2006 Jan 15
Externally publishedYes

Keywords

  • AFM
  • Anionic polymerization
  • FTIR
  • Polymer brushes
  • Self-assembled monolayer
  • Surface polymerization

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

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