Reactive Superhydrophobic Surface and Its Photoinduced Disulfide-ene and Thiol-ene (Bio)functionalization

Reactive
superhydrophobic surfaces are highly promising for biotechnological,
analytical, sensor, or diagnostic applications but are difficult to
realize due to their chemical inertness. In this communication, we
report on a photoactive, inscribable, nonwettable, and transparent
surface (PAINTS), prepared by polycondensation of trichlorovinylsilane
to form thin transparent reactive porous nanofilament on a solid substrate.
The PAINTS shows superhydrophobicity and can be conveniently functionalized
with the photoclick thiol-ene reaction. In addition, we show for the
first time that the PAINTS bearing vinyl groups can be easily modified
with disulfides under UV irradiation. The effect of superhydrophobicity
of PAINTS on the formation of high-resolution surface patterns has
been investigated. The developed reactive superhydrophobic coating
can find applications for surface biofunctionalization using abundant
thiol or disulfide bearing biomolecules, such as peptides, proteins,
or antibodies.