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  • Title: Aggregation and coarsening of ligand-stabilized gold nanoparticles in poly(methyl methacrylate) thin films.
    Author: Meli L, Green PF.
    Journal: ACS Nano; 2008 Jun; 2(6):1305-12. PubMed ID: 19206349.
    Abstract:
    Dodecanethiol-stabilized gold nanoparticles (5 nm diameter) are shown to self-organize to form a two-dimensional hexagonal structure in poly(methyl methacrylate) films upon spin-casting from solution onto a substrate, using high-angle annular dark-field scanning transmission electron microscopy. Through use of the distribution functions describing particle distributions, we show that the particle coarsening dynamics is self-similar, characterized by two distinct growth stages. During the initial stage, coarsening occurs via simultaneous Ostwald ripening and coalescence mechanisms, whereas during the second stage, the dominant coarsening mechanism is coalescence.
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