Reversible Liquid Adhesion Switching of Superamphiphobic Pd-Decorated Ag Dendrites via Gas-Induced Structural Changes

Dayeong Kim, Jungmok Seo, Sera Shin, Soonil Lee, Kilsoo Lee, Hyeonjin Cho, Wooyoung Shim, Han Bo Ram Lee, Taeyoon Lee

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Adhesion control of various liquid droplets on a liquid-repellent surface is a fundamental technique in novel open channel microfluidic systems. Herein, we demonstrate reversible liquid droplet adhesion switching on superamphiphobic Pd-decorated Ag dendrites (Pd/Ag dendrites). Although adhesion between liquids and the superamphiphobic surfaces was extremely low under ambient air, high adhesion was instantly achieved by exposure of the dendrites to 8% hydrogen gas. Transition from low to high adhesion and the reverse case were successfully repeated more than 10 times by switching from atmospheric ambient air to 8% hydrogen gas. This is the first technique that allows real-time reversible adhesion change with various liquid droplets to a surface using gas-induced structural changes and can potentially be used to realize various functions for droplet-based microfluidics.

Original languageEnglish
Pages (from-to)4964-4971
Number of pages8
JournalChemistry of Materials
Volume27
Issue number14
DOIs
Publication statusPublished - 2015 Jul 28

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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