Switchable water-adhesive, superhydrophobic palladium-layered silicon nanowires potentiate the angiogenic efficacy of human stem cell spheroids

Jungmok Seo, Jung Seung Lee, Kihong Lee, Dayeong Kim, Kisuk Yang, Sera Shin, Chandreswar Mahata, Hwae Bong Jung, Wooyoung Lee, Seung Woo Cho, Taeyoon Lee

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Abstract

A study was conducted to demonstrate how switchable water-adhesive, superhydrophobic palladium-layered silicon nanowires potentiated the angiogenic efficacy of human stem cell spheroids. The water-adhesion switchable superhydrophobic surface was fabricated by deposition of a gas-sensitive palladium (Pd) layer onto vertically aligned silicon (Si) nanowires (NWs) and by subsequent coating with dodecylalkyltrichlorosilane (DTS). The resulting Pd-covered Si NWs (Pd/Si NWs) exhibited high water-repellant properties under atmospheric conditions. The surface of the Pd/Si NWs became water adhesive when exposed to ambient hydrogen (H2). The adhesion transition process occurred within only 5 seconds and the Pd/Si NWs showed extremely large water contact angle (WCA) in both ambient conditions.

Original languageEnglish
Pages (from-to)7043-7050
Number of pages8
JournalAdvanced Materials
Volume26
Issue number41
DOIs
Publication statusPublished - 2014 Jan 1

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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