Research article Topical Sections

Hydrophilic surfaces via the self-assembly of nitrile-terminated alkanethiols on gold

  • Received: 12 December 2017 Accepted: 22 February 2018 Published: 06 March 2018
  • A series of CN-terminated alkanethiols were synthesized and used to generate self-assembled monolayers (SAMs) on gold. The SAMs were characterized using ellipsometry, contact angle goniometry, polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), and X-ray photoelectron spectroscopy (XPS). The SAMs were compared to those derived from a series of analogous CH3-terminated alkanethiols. The CN-terminated SAMs exhibited lower film thicknesses than the CH3-terminated SAMs, which was largely due to their greater tilt angle on the surface. Additionally, the CN-terminated SAMs form well-ordered films on flat gold surfaces with relative packing densities being indistinguishable from the CH3-terminated SAMs. The CN-terminated SAMs exhibited a less hydrophobic character than the SAMs derived from CH3-terminated adsorbates, which was attributed to the dipole moment of the terminal group as well as the lone pair of the nitrogen atom of the CN-terminal group.

    Citation: Chul Soon Park, Oussama Zenasni, Maria D. Marquez, H. Justin Moore, T. Randall Lee. Hydrophilic surfaces via the self-assembly of nitrile-terminated alkanethiols on gold[J]. AIMS Materials Science, 2018, 5(2): 171-189. doi: 10.3934/matersci.2018.2.171

    Related Papers:

  • A series of CN-terminated alkanethiols were synthesized and used to generate self-assembled monolayers (SAMs) on gold. The SAMs were characterized using ellipsometry, contact angle goniometry, polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), and X-ray photoelectron spectroscopy (XPS). The SAMs were compared to those derived from a series of analogous CH3-terminated alkanethiols. The CN-terminated SAMs exhibited lower film thicknesses than the CH3-terminated SAMs, which was largely due to their greater tilt angle on the surface. Additionally, the CN-terminated SAMs form well-ordered films on flat gold surfaces with relative packing densities being indistinguishable from the CH3-terminated SAMs. The CN-terminated SAMs exhibited a less hydrophobic character than the SAMs derived from CH3-terminated adsorbates, which was attributed to the dipole moment of the terminal group as well as the lone pair of the nitrogen atom of the CN-terminal group.


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