American Chemical Society
nn2c01558_si_001.pdf (1.91 MB)

Multiscale Characterization of the Influence of the Organic–Inorganic Interface on the Dielectric Breakdown of Nanocomposites

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journal contribution
posted on 2022-04-08, 10:43 authored by Priscilla F. Pieters, Antoine Lainé, He Li, Yi-Hsien Lu, Yashpal Singh, Lin-Wang Wang, Yi Liu, Ting Xu, A. Paul Alivisatos, Miquel Salmeron
Nanoscale engineered materials such as nanocomposites can display or be designed to enhance their material properties through control of the internal interfaces. Here, we unveil the nanoscale origin and important characteristics of the enhanced dielectric breakdown capabilities of gold nanoparticle/polymer nanocomposites. Our multiscale approach spans from the study of a single chemically designed organic/inorganic interface to micrometer-thick films. At the nanoscale, we relate the improved breakdown strength to the interfacial charge retention capability by combining scanning probe measurements and density functional theory calculations. At the meso- and macroscales, our findings highlight the relevance of the nanoparticle concentration and distribution in determining and enhancing the dielectric properties, as well as identifying this as a crucial limiting factor for the achievable sample size.