Lubricant bonding via terminal bond network

Lubricants having a functional end group were bonded onto thin magnetic disks via electrostatic interaction or strong coordinate bond. A pseudo two-dimensional hydrogen-bond network was formed by two different lubricants, R¹NH₂ and R²C00H, and gave contact angles of around 100 degrees over a wide range of NH ₂/COOH ratio. On the other hand, self-assembled monolayers of alkanethiols, which coordinate strongly to gold surfaces through the sulfur atom, also gave a hydrophobic surface: contact angles of ca. 105 degrees. FTIR spectra revealed that the alkyl chains in the terminally functionalized films were orientated perpendicular to the surface, which indicates the alkyl chains were densely packed in the resulting films. These methods are simple yet effective ways to produce lubricant layers of comb type structure