Phase Separation gives Rise to Nanoparticle Ring Formation
نویسندگان
چکیده
Z. Naturforsch. 58a, 392 – 396 (2003); received May 24, 2003 We report on the formation of self-assembled rings of CoPt3 nanoparticles in ultrathin polymer films (ring diameter about 1 μm, particle diameter 6 nm). The polymer thin film was formed by wetting a polymer solution on the surface of water. The process of self-assembling turns out to result from phase separation of the binary polymer solution film used, the subsequent dewetting of the top layer, and its decomposition into droplets on the surface of the bottom layer.
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