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<p>Nanocomposites composed of polydimethylsiloxane (PDMS) containing particles of barium titanate (BaTiO<sub>3</sub> or BTO) could be used for energy storage, capacitive sensing, and energy harvesting. However, the relationships between BTO particle size, filler–matrix interactions, and the properties of BTO–PDMS nanocomposites are not completely understood. We report that the dielectric constant of BTO-filled PDMS decreases when BTO particles have diameters ≤ 100&#xa0;nm. Results from experiments, finite element analysis, and density functional theory simulations indicate that the phenomenon could be due to a decline in the dielectric constant of BTO at smaller particle sizes and filler–matrix interactions that deform the structure of BTO.</p> Graphical abstract <p></p>

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Examining the impacts of particle size and filler–matrix interactions on the dielectric properties of silicone-matrix nanocomposites containing barium titanate

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Brigitte Lynch Johnson,
  • Vanessa Bartling,
  • Kayla Long,
  • Miranda Brandt,
  • Ian Smith,
  • Luis Lorenzana,
  • Natalie Smith,
  • Ian Osborne,
  • Warren Pham,
  • Albert Dato,
  • Todd Monson,
  • Renee Van Ginhoven

摘要

Nanocomposites composed of polydimethylsiloxane (PDMS) containing particles of barium titanate (BaTiO3 or BTO) could be used for energy storage, capacitive sensing, and energy harvesting. However, the relationships between BTO particle size, filler–matrix interactions, and the properties of BTO–PDMS nanocomposites are not completely understood. We report that the dielectric constant of BTO-filled PDMS decreases when BTO particles have diameters ≤ 100 nm. Results from experiments, finite element analysis, and density functional theory simulations indicate that the phenomenon could be due to a decline in the dielectric constant of BTO at smaller particle sizes and filler–matrix interactions that deform the structure of BTO.

Graphical abstract