Reversible and Irreversible Binding of Nanoparticles to Polymeric Surfaces

Abstract EN

Reversible and irreversible binding of CdSe-nanoparticles and nanorods to polymeric surfaces via a strong, multiple hydrogen bond (= Hamilton-receptor/barbituric acid) is described.

Based on ROMP-copolymers, the supramolecular interaction on a thin polymer film is controlled by living polymerization methods, attaching the Hamilton-receptor in various architectures, and concentrations.

Strong binding is observed with CdSe-nanoparticles and CdSe-nanorods, whose surfaces are equipped with matching barbituric acid-moieties.

Addition of polar solvents, able to break the hydrogen bonds leads to the detachment of the nanoparticles from the polymeric film.

Irreversible binding is observed if an azide/alkine-“click”-reaction is conducted after supramolecular recognition of the nanoparticles on the polymeric surface.

Thus reversible or irreversible attachment of the nanosized objects can be achieved.