Inverse and Reversible Switching Gradient Surfaces from Mixed Polyelectrolyte Brushes
- 13 October 2004
- journal article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 20 (23), 9916-9919
- https://doi.org/10.1021/la048158a
Abstract
We report on a thin polyelectrolyte film (mixed polyelectrolyte brush) with a gradual change of the composition (ratio between two different oppositely charged surface-grafted weak polyelectrolytes) across the sample. The gradient of surface composition creates a gradient in surface charge density and, consequently, a gradient of the wetting behavior. The gradient film is sensitive to a pH signal and can be reversibly switched via pH change.Keywords
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