Characterization of photooxidized self-assembled monolayers and bilayers by spontaneous desorption mass spectrometry. Academic Article uri icon

abstract

  • We show that selected self-assembled monolayers (SAMs) and bilayers are readily characterized by the application of controlled photooxidation and spontaneous desorption mass spectrometry (SDMS) in the negative ion mode. Additionally, SDMS is used to characterize organic and inorganic anionic species adsorbed to the surface of a positively charged SAM surface, 2-aminoethanethiol (AET). Prominent peaks are observed that correspond both to the sulfonate form of each SAM and bilayer and to the anion form of each molecule adsorbed to AET. In addition, fragments of the oxidized thin films were also observed at m/z 80 (SO3-) and 97 (HSO4-). Other prominent fragment peaks more characteristic of the molecule are also seen in the mass spectra.

published proceedings

  • Anal Chem

altmetric score

  • 3

author list (cited authors)

  • English, R. D., Van Stipdonk, M. J., Sabapathy, R. C., Crooks, R. M., & Schweikert, E. A.

citation count

  • 14

complete list of authors

  • English, RD||Van Stipdonk, MJ||Sabapathy, RC||Crooks, RM||Schweikert, EA

publication date

  • December 2000