1 research outputs found
Spatial Site-Patterning of Wettability in a Microcapillary Tube
Substrate
functionalization is of great importance in successfully manipulating
flows and liquid interfaces in microdevices. Herein, we propose an
alternative approach for spatial patterning of wettability in a microcapillary
tube. The method combines a photolithography process with self-assembled
monolayer formation. The modified microcapillaries show very sharp
boundaries between the alternating hydrophilic/hydrophobic segments
with an achieved smallest domain dimension down to 60 μm inside
a 580 μm inner diameter capillary. Our two-step method allows
us to pattern multiple types of functional groups in an enclosed channel.
Such structures are promising regarding the manipulation of segmented
flows inside capillaries