Characterization of Self-Assembled Monolayers on a Ruthenium Surface

نویسندگان

  • A Shaheen
  • J M Sturm
  • R Ricciardi
  • J Huskens
  • C J Lee
  • F Bijkerk
چکیده

We have modified and stabilized the ruthenium surface by depositing a self-assembled monolayer (SAM) of 1-hexadecanethiol on a polycrystalline ruthenium thin film. The growth mechanism, dynamics, and stability of these monolayers were studied. SAMs, deposited under ambient conditions, on piranha-cleaned and piranha + H2SO4 cleaned substrates were compared to monolayers formed on H-radical-cleaned Ru surfaces. We found that alkanethiols on H-radical-cleaned Ru formed densely packed monolayers that remained stable when kept in a nitrogen atmosphere. X-ray photoelectron spectroscopy (XPS) shows a distinct sulfur peak (BE = 162.3 eV), corresponding to metal-sulfur bonding. When exposed to ambient conditions, the SAM decayed over a period of hours.

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عنوان ژورنال:

دوره 33  شماره 

صفحات  -

تاریخ انتشار 2017