Phase behavior and rheological properties of polyelectrolyte inks for direct-write assembly

Gregory M. Gratson, Jennifer A. Lewis

Research output: Contribution to journalArticle

Abstract

Three-dimensional (3-D) structures with micron-sized features have been fabricated via the direct-write assembly of polyelectrolyte inks1. By mixing oppositely charged species under solution conditions that promote polyelectrolyte exchange reactions, we have created concentrated fluids capable of flowing through microscale deposition nozzles. Ink deposition into an alcohol/water coagulation reservoir yielded polyelectrolyte filaments that rapidly solidify to enable three-dimensional patterning of microperiodic structures with self-supporting features. The influence of ink and reservoir chemistry on the phase behavior, rheological properties, and assembly of concentrated polyelectrolyte complexes is reported with an emphasis on the optimal conditions for 3-D writing.

Original languageEnglish (US)
Pages (from-to)457-464
Number of pages8
JournalLangmuir
Volume21
Issue number1
DOIs
StatePublished - Jan 4 2005

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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