Confined
Growth and Controlled Coalescence/Self-Removal of Condensate Microdrops
on a Spatially Heterogeneously Patterned Superhydrophilic–Superhydrophobic
Surface
Posted on 2020-06-22 - 14:21
Manipulating
condensate nucleation, growth, coalescence, and self-removal via bionic
super-wettability surfaces has attracted intensive interest because
of their significance in fundamental research and technological innovations,
for example, water harvesting, power generation, air conditioning,
and thermal management. However, it is still a challenge to simultaneously
realize confined growth, coalescence, and self-ejection of condensate
microdrops, which has not been reported to date. Here, we propose
and demonstrate a type of new and more efficient coalescence/self-removal
method based on spatially confined growth/coalescence/self-ejection
of condensate microdrops, which can be realized using a rationally
designed superhydrophobic surface with spatially heterogeneously patterned
superhydrophilic microdots (SMDs). Exemplified by superhydrophobic
closely packed zinc oxide nanoneedles with SMD patterns, we investigate
how the geometric parameters of SMD patterns be designed to simultaneously
realize the spatially confined growth/coalescence/self-ejection of
patterned microdrops, which are rationalized via theoretical analyses.
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Xing, Dandan; Wang, Rui; Wu, Feifei; Gao, Xuefeng (2020). Confined
Growth and Controlled Coalescence/Self-Removal of Condensate Microdrops
on a Spatially Heterogeneously Patterned Superhydrophilic–Superhydrophobic
Surface. ACS Publications. Collection. https://doi.org/10.1021/acsami.0c04922
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