Bell‐Shaped Superhydrophilic–Superhydrophobic–Superhydrophilic Double Transformation on a pH‐Responsive Smart Surface
- 7 October 2013
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 26 (2), 306-310
- https://doi.org/10.1002/adma.201302187
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)11NH2. A ternary diagram is generated that describes wettability as a function of the SAM composition and the pH of the surrounding solution.Keywords
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