Oil-water biphasic parallel flow for the precise patterning of metals and cells

Xuan Mu, Qionglin Liang*, Jun Zhou, Kangning Ren, Ping Hu, Yiming Wang, Zhi Zheng*, Guoan Luo*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

4 Citations (Scopus)


Fluidic patterning is a convenient and versatile tool for the patterning of materials, cells and microstructures on surface and in microchannels. However, its performance is usually limited by transverse diffusion between fluid streams. It would blur the boundary and deteriorate the precision of patterns. In this paper, we adopted geometric confinement to generate biphasic parallel flow that is constituted of oil and water. Since there is minimum transverse diffusion in biphasic parallel flow, the performance of fluid patterning is expected to be improved. The results show that the metal (Silver and Chromium) patterns have distinct boundary and well-controlled geometry in comparison with that by conventional laminar flow patterning. Furthermore, the high biocompatibility of oil phase (perfluorodecalin, PFD) enables the precise patterning of viable bacteria inside microchannels. Our work demonstrated a new route of using biphasic parallel flow to patterning, which would serve wide applications in prototyping and research settings.

Original languageEnglish
Pages (from-to)245-253
Number of pages9
JournalBiomedical Microdevices
Issue number2
Early online date17 Dec 2013
Publication statusPublished - Apr 2014

Scopus Subject Areas

  • Biomedical Engineering
  • Molecular Biology

User-Defined Keywords

  • Bacteria
  • Biphasic flow
  • Metal
  • Microfluidics
  • Patterning
  • Perfluorodecalin


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