2006/03/29 by Sudeshna Chattopadhyay, Chattopadhyay, Sudeshna, Alokmay Datta +1
Materials Science · Physics and Astronomy · #Block Copolymer Self-Assembly #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Pickering emulsions and particle stabilization #Polymer Surface Interaction Studies #Soft Condensed Matter (cond-mat.soft) #cond-mat.mtrl-sci #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.cond-mat/0603785
10 pages, 3 Figures
arxiv created 2006/03/29 · openalex publication_date 2006/03/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Au nanoparticles with near perfect monodispersity in shape and size self-assemble, very slowly and at room temperature, on polystyrene films for film thickness < 4Rg, Rg 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.