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- W2078631965 abstract "We study the mechanism and kinetics of fullerene C60 association in model homopolymer thin films upon isothermal annealing. Uniform polystyrene (PS) films loaded with 0–5% C60 mass fraction, on both sides of the miscibility threshold, are annealed and monitored over time. A transition from heterogeneous, sparse, nucleation to a percolated spinodal morphology is observed with increasing C60 loading and time. Fullerene association is followed by crystallization, which is quantified by Avrami kinetics in two dimensions. Key regimes of the process are identified as nucleation, percolation, saturation and coarsening stages, and defined in terms of the evolution of cluster average size ⟨r⟩, number density Nd, area fraction Af, and dominant wavenumber q*. The “spinodal clustering” process results in a percolated lateral morphology and undulating surface topography whose wavelength λ and amplitude δh can be tuned with temperature T, time t, film thickness h and polymer molecular mass Mw. These results provide insight into pattern formation in nanocomposites relevant to engineering functional materials, including organic photovoltaics and thin film coatings." @default.
- W2078631965 created "2016-06-24" @default.
- W2078631965 creator A5024814980 @default.
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- W2078631965 date "2011-05-10" @default.
- W2078631965 modified "2023-10-11" @default.
- W2078631965 title "Mechanism and Kinetics of Fullerene Association in Polystyrene Thin Film Mixtures" @default.
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- W2078631965 doi "https://doi.org/10.1021/ma2004458" @default.
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