混合聚电解质刷的可逆和反向切换梯度表面

Inverse and reversible switching gradient surfaces from mixed polyelectrolyte brushes.

作者信息

Ionov Leonid, Houbenov Nikolay, Sidorenko Alexander, Stamm Manfred, Luzinov Igor, Minko Sergiy

机构信息

Institute for Polymer Research Dresden, Dresden, Germany.

出版信息

Langmuir. 2004 Nov 9;20(23):9916-9. doi: 10.1021/la048158a.

DOI:10.1021/la048158a

PMID:15518474

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.

摘要

我们报道了一种薄的聚电解质薄膜（混合聚电解质刷），其组成（两种不同带相反电荷的表面接枝弱聚电解质之间的比例）在整个样品上呈逐渐变化。表面组成的梯度产生了表面电荷密度的梯度，进而产生了润湿行为的梯度。这种梯度薄膜对pH信号敏感，并且可以通过pH变化进行可逆切换。