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.com
Volume 8
Journal of Biotechnology and Biomaterials
ISSN: 2155-952X
Biomaterials 2018
March 05-06, 2018
March 05-06, 2018 | Berlin, Germany
3
rd
Annual Conference and Expo on
Biomaterials
In situ
adhesion switching on non-symmetrical hydrophobic-superhydrophobic patterned surfaces
for droplets transfer
Xiaolong Yang, Xin Liu and Jinlong Song
Dalian University of Technology, China
H
ydrophobic-superhydrophobic patterned surface was fabricated on copper surfaces by site-selectively oxidation using
ink masking and subsequent surface energy reduction. Anisotropic sliding of droplets on typical non-centrosymmetrical
hydrophobic-superhydrophobic patterns such as semicircle, line segment and V-shaped line patterns was observed. Pattern
dimensions (semicircle diameter, line segment length and V-shape angle) were designed to control the sliding anisotropy.
Experimental data on sliding adhesion was in good agreement with the calculated data using classical drag-adhesion model
(Furmidge equation). Taking advantage of the anisotropic sliding adhesion, the non-centrosymmetrical pattern can be used
as a “mechanical hand” to
in situ
capture and release micro droplets by simply moving the pattern in different directions. The
hand can capture a droplet pinned on a dot by lifting the pattern after touching the droplet. Meanwhile, the hand can also
release the droplet simply by horizontally moving the pattern in low-sliding-adhesion direction. Due to the hydrophobicity of
those patterns, the droplet can be handled by this mechanical hand without mass loss. The ability of switching droplet handling
functions (capture and release) using simple linear motions would facilitate the development of practical applications for
droplet-based reactors in biomedical domains.
xiaolongyoung@outlook.comJ Biotechnol Biomater 2018, Volume 8
DOI: 10.4172/2155-952X-C1-089