Abstract
Block copolymer micelles are generally formed by the self‐assembly of amphiphilic copolymer molecules in aqueous medium. Although different types of block copolymer micelles have been studied, the self‐assembly behavior of block copolymer micelles in confined geometries have been rarely studied. In this work, the fabrication of polystyrene‐block‐poly(4‐vinylpyridine) (PS‐b‐P4VP) micelle nanotubes in the cylindrical nanopores of anodic aluminum oxide templates using a solvent‐annealing‐assisted wetting method is presented. The PS‐b‐P4VP chains wet the pore walls in the form of micelles when the sample is annealed in the vapor of toluene, a good solvent for PS and a nonsolvent for P4VP. The formation of the PS‐b‐P4VP micelle nanotubes instead of nanorods implies that the micelles wet the nanopores in the complete wetting regime. This study not only contributes to a deeper understanding of the self‐assembly behavior of block polymer micelles in confined geometries, but also provides more possible variations and design freedoms in the application of block copolymer micelles. image
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