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Polyelectrolytes as new matrices for secondary ion mass spectrometry

  • Yit-Yian Lua
  • Li Yang
  • Craig A. Pew
  • Feng Zhang
  • W. Jonathan
  • J. Fillmore
  • R. Todd Bronson
  • Amarchand Sathyapalan
  • Paul B. Savage
  • Jed D. Whittaker
  • Robert C. Davis
  • Matthew R. Linford
Articles

Abstract

Significant enhancements in ion yields in time-of-flight secondary ion mass spectrometry (TOF-SIMS) are observed when water-soluble analytes are mixed with a polyelectrolyte, e.g., poly(diallyldimethylammonium chloride) or poly(sodium 4-styrenesulfonate), and then deposited in the layer-by-layer method on a surface. This previously unobserved effect is demonstrated for 5-chloro-8-methoxyquinoline appended diaza-18-crown-6, 5-(2-aminoethoxy)methyl-5-chloro-8-methoxyquinoline appended diaza-18-crown-6, acridine, 9-anthracenecarboxylic acid, and ferrocenecarboxylic acid. By optical ellipsometry film thicknesses range from ca. 5–20 Å. X-ray photoelectron spectroscopy shows significantly less analyte in the polyelectrolyte-analyte films than in the neat analytes. However, TOF-SIMS generally shows significant enhancements in ion yields from the polyelectrolyte films compared with either the neat compounds or the compounds solubilized with acid or base and then dried on a surface. These significant enhancements in ion yields also appear to extend to analyte fragments and cationized molecular species. Some enhancement is also observed for dried droplets of analytes mixed with a polyelectrolyte on surfaces.

Keywords

Heterolysis Diallyldimethylammonium Chloride Ferrocenecarboxylic Acid Polyelectrolyte Film Thin Native Oxide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© American Society for Mass Spectrometry 2005

Authors and Affiliations

  • Yit-Yian Lua
    • 1
  • Li Yang
    • 1
  • Craig A. Pew
    • 1
  • Feng Zhang
    • 1
  • W. Jonathan
    • 1
  • J. Fillmore
    • 1
  • R. Todd Bronson
    • 1
  • Amarchand Sathyapalan
    • 1
  • Paul B. Savage
    • 1
  • Jed D. Whittaker
    • 2
  • Robert C. Davis
    • 2
  • Matthew R. Linford
    • 1
  1. 1.Department of Chemistry and BiochemistryBrigham Young UniversityProvoUSA
  2. 2.Department of PhysicsBrigham Young UniversityProvoUSA

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