2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Design and Fabrication of Nanopatterned Polymer Brushes with Applications as Switchable Microfluidics Gates

S. Minko
Clarkson University, US

Responsive thin films, polymer brushes, microfludic channels

A combination of various contradicting properties in the same material is a unique characteristic of responsive materials. A hybrid thin polymer film is one of the successful examples of such a combination. Several unlike polymers combined in the same thin film provide the combination of different properties of the hybrid film. The interaction of the thin film with its environment results in switching between these different properties. Mixed polymer brushes were designed using this concept. In the mixed brushes, two different polymers are end-grafted to the same substrate. Selective interactions of one of the polymers with the brush’s environment provoke a layered segregation (stratification) and preferential exposure of this polymer to the environment. This mechanism results in switching of the surface properties of the brush between properties of the two unlike polymers. We demonstrate applications of these responsive nanostructured thin films for microfluidic gates and “smart” microfludic channels.

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Nanotech 2007 Conference Program Abstract


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