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The investigation of de-icing and uni-directional droplet driven on a soft liquid-metal chip controlled through electrical current

  • Lei Wang
  • , Shihui Zhan
  • , Peng Qin
  • , Shousheng Tang
  • , Jing Yang
  • , Wenbo Yu
  • , Yongping Hou*
  • , Jing Liu
  • *Corresponding author for this work
  • CAS - Technical Institute of Physics and Chemistry
  • Hainan Vocational University of Science and Technology
  • Beijing Jiaotong University
  • Tsinghua University

Research output: Contribution to journalArticlepeer-review

Abstract

To realize the functions of de-icing and self-propelling of droplet, one soft and superhydrophobic microfluidic chip (SMC) equipped with the liquid metal was successfully fabricated in this work. After modification via nanostructures and lower surface free energy cover, the SMC surface shows self-cleaning performance. The surface not only could realize self-propelling of droplet at room temperature but also uni-directional de-icing even −30 °C after melting. The results indicate the driving force is induced by the thermal gradient, which is generated by resistance heating of liquid metal (GaIn24.5). This study is significant for extending the applications of microfluidic chip in low temperature condition.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume106
DOIs
StatePublished - Jan 2020

Keywords

  • De-icing
  • Liquid metal
  • Self-propelling
  • Soft
  • Superhydrophobic microfluidic chip

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