This presentation describes the characterization and comparison of partially-fluorinated methyl-terminated self-assembled monolayers (methyl FSAMs) on gold and underpotentially-deposited (UPD) silver substrates. Sum frequency generation (SFG) spectroscopy and infrared reflection-absorption spectroscopy (IRRAS) data gathered in the C–F and C–H stretching regions between 1100-1450 cm<sup>-1</sup> and 2750-3100 cm<sup>-1</sup>, respectively, provide information about the overall structures and orientations of the films. To determine if the change in substrate affects the macroscopic properties of the film, the wetting phenomena of the methyl FSAMs was probed using contact angle goniometry with a wide variety of probe liquids. The spectroscopically-derived orientation of the molecules in air and under contacting liquids was compared to the wettability of the FSAMs to provide insight into the effects of nanoscopic surface structure on the macroscopic properties of the films.

Sum frequency generation spectroscopy of partially fluorinated methyl-terminated self-assembled monolayers on gold and UPD-silver surfaces

255th National Meeting (2018)

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