Tunable Self-assembly of Au-nanoparticles with Near-Perfect Monodispersity

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Au nanoparticles with near perfect monodispersity in shape and size self-assemble, very slowly and at room temperature, on polystyrene films for film thickness < 4R_{g}$, R_{g} being unperturbed polymer gyration radius. Nanoparticle shape and size can be tuned, without sacrificing monodispersity, by changing polymer film thickness. Self-assembly is caused by enhanced two-dimensional diffusion of sputter-deposited Au clusters on a distribution of surface energy variations, sharply defined and with tunable dimensions, corresponding to low cohesion between gyration spheres on film surface. Lowering of cohesion and enhanced surface diffusion are clearly related to confinement-induced gyration sphere layering along film depth.
10 pages, 3 Figures

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Materials Science, Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/109548

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0603785
 http://arxiv.org/abs/cond-mat/0603785

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arXiv