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

Srivatsan Kidambi, Christina Chan, Ilsoon Lee

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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).

LanguageEnglish (US)
Pages4697-4703
Number of pages7
JournalJournal of the American Chemical Society
Volume126
Issue number14
DOIs
StatePublished - Apr 14 2004

Profile

Ethylene Glycol
Self assembled monolayers
Polyelectrolytes
Polyethylene glycols
Multilayers
Multilayer films
Acids
Printing
Ink
Molecules
Atomic Force Microscopy
Charged particles
Optical microscopy
Anions
Cations
Microscopy
Monolayers
Atomic force microscopy
Negative ions
Positive ions

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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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).",
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