Spatial site-patterning of wettability in a microcapillary tube

Yali Zhang, Jan W. van Nieuwkasteele, Meng Qiang, Peichun Amy Tsai, Rob G.H. Lammertink

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)10657-10660
JournalACS applied materials & interfaces
Issue number17
Publication statusPublished - 2016


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