1 research outputs found
Fabrication of Superhydrophobic and Oleophobic Surfaces with Overhang Structure by Reverse Nanoimprint Lithography
This
work reports the fabrication of superhydrophobic and oleophobic surfaces
with an overhang structure by reverse nanoimprint lithography. An
overhang structure is difficult to fabricate by conventional lithography;
however, it was conveniently formed by reverse imprint lithography,
employed in conjunction with reactive ion etching. The obtained overhang
structure was coated with a fluoroalkylsilane monolayer to reduce
its surface energy. Further, four different types of nanopatterns
were separately embedded on the surface of the obtained overhang structure
by modified reverse imprint lithography to enhance its oil-repelling
properties. The embedded nanopatterns resulted in different overhang
angles, thereby enhancing the oil-repelling properties. The morphology
and wetting characteristics of the overhang structure were investigated
by scanning electron microscopy and contact angle measurements. This
study demonstrates that an overhang structure can be successfully
fabricated on a substrate by reverse nanoimprint lithography; moreover,
oleophobic structures can be realized using materials with contact
angles <90