Spatial Site-Patterning of Wettability in a Microcapillary Tube

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

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
96 Downloads (Pure)

Abstract

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
Volume8
Issue number17
DOIs
Publication statusPublished - 2016

Keywords

  • IR-100969
  • METIS-317546

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