Bell-shaped superhydrophilic-superhydrophobic-superhydrophilic double transformation on a pH-responsive smart surface

Mengjiao Cheng, Qian Liu, Guannan Ju, Yajun Zhang, Lei Jiang, Feng Shi

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97 Citations (Scopus)

Abstract

Superhydrophobic to neutral water droplets, superhydrophilic to acidic or basic. This double transition of surface wettability in response to a single stimulus - pH - is demonstrated for the first time. The smart surface is composed of a rough gold surface modified with a self-assembled monolayer (SAM) containing three thiols, HS(CH2)11CH3, HS(CH2)10COOH, and HS(CH2)11NH 2. A ternary diagram is generated that describes wettability as a function of the SAM composition and the pH of the surrounding solution.

Original languageEnglish
Pages (from-to)306-310
Number of pages5
JournalAdvanced Materials
Volume26
Issue number2
DOIs
Publication statusPublished - 15 Jan 2014
Externally publishedYes

Keywords

  • pH-responsive surface
  • self-assembled monolayer
  • smart surface
  • superhydrophilicity
  • superhydrophobicity
  • ternary diagram

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