Inverse and reversible switching gradient surfaces from mixed polyelectrolyte brushes |
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Authors: | Ionov Leonid Houbenov Nikolay Sidorenko Alexander Stamm Manfred Luzinov Igor Minko Sergiy |
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Institution: | Institute for Polymer Research Dresden, Dresden, Germany. |
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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. |
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