Selective Depositions on Polyelectrolyte Multilayers: Self-Assembled Monolayers of m-dPEG Acid as Molecular Template

Srivatsan Kidambi, Christina Chan, Ilsoon Lee

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

This paper describes the fabrication of self-assembled monolayer (SAM) patterns of m-d-poly-(ethylene glycol) (m-dPEG) acid molecules onto polyelectrolyte multilayers (PEMs). The patternal SAMs on PEMs were created by ionic interactions using microcontact printing (μCP) technique. The created m-dPEG acid monolayer patterns on PEMs act as resistive templates, and thus further depositions of consecutive poly(anion)/poly(cation) pairs of charged particles result in the formation of three-dimensional (3-D) patterned PEM films or selective particle depositions atop the original multilayer thin films. In this study, we illustrate nonlithographic methods of patterning and controlling 3-D PEM architectures and selective particle depositions. We investigated the effect of variables-the choice of solvent, concentration, pH, substrate pretreatment, and stamp contact times-on microcontact printing of m-dPEG acid molecules onto PEM films to determine the optimal conditions for these parameters to achieve efficient transfer of m-dPEG acid patterns onto PEMs. Among the variables, the pH of the m-dPEG acid ink solution played the most important role in the transfer efficiency of the patterns onto the multilayer films. The patterned films were characterized by optical microscopy and atomic force microscopy (AFM).

Original languageEnglish (US)
Pages (from-to)4697-4703
Number of pages7
JournalJournal of the American Chemical Society
Volume126
Issue number14
DOIs
StatePublished - Apr 14 2004

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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