Abstract:
:Many applications in modern technology, such as self-cleaning surfaces and digital microfluidics, require control over individual fluid droplets on flat surfaces. Existing techniques may suffer from side effects resulting from high electric fields and high temperatures. Here, we introduce a markedly different method, termed "mechanowetting," that is based on the surface tension-controlled droplet motion on deforming surfaces. The method is demonstrated by transporting droplets using transverse surface waves on horizontal and (vertically) inclined surfaces at transport velocities equal to the wave speed. We fully capture the fundamental mechanism of the mechanowetting force numerically and theoretically and establish its dependence on the fluid properties, surface energy, and wave parameters. Mechanowetting has the potential to lead to a range of new applications that feature droplet control through dynamic surface deformations.
journal_name
Sci Advjournal_title
Science advancesauthors
De Jong E,Wang Y,Den Toonder JMJ,Onck PRdoi
10.1126/sciadv.aaw0914subject
Has Abstractpub_date
2019-06-14 00:00:00pages
eaaw0914issue
6issn
2375-2548pii
aaw0914journal_volume
5pub_type
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