Abstract
We report on the synthesis and characterization of water-soluble stimuli-responsive organosilica hybrid nanowires that can be used as carriers for metallic nanoparticles. The nanowires were prepared from core−shell-structured cylindrical polymer brushes that served as templates with uniform size and shape. The core of the nanowires consists of a silsesquioxane network synthesized through a precursor route. The shell consists of a dense layer of poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA). The hybrid nanowires exhibit pH-responsive behavior, because of the weak polyelectrolyte nature of the PDMAEMA shell. Simultaneously, the shell of PDMAEMA acts as a nanoreactor for the synthesis and immobilization of metal nanoparticles. It was further quaternized with methyl iodide, leading to a poly{[2-(methacryloyloxy)ethyl] trimethylammonium iodide} (PMETAI) cationic polyelectrolyte shell around the silsesquioxane core. The as-synthesized cationic organosilica hybrid nanowires are sensitive to salt concentrat...
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