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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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Silver Nanowires Epsilon-Negative Metacomposites in Constructing Laminated Structure Meta-Capacitors.

Zongxiang Wang1,2, Kai Sun3,2, Yuan Yuan1,2

  • 1Logistics Engineering College, Shanghai Maritime University, Shanghai, 201306, China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 30, 2025
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Summary

New meta-capacitors using polyvinylidene fluoride, barium titanate, and silver nanowires achieve enhanced energy storage. These epsilon-negative devices offer superior dielectric properties for advanced capacitor applications.

Keywords:
epsilon‐negative materialslaminated meta‐capacitorsmetacompositespercolation structuresplasma oscillation

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Conventional capacitor materials face limitations in balancing dielectric constant, losses, and energy density.
  • Epsilon-negative metacomposites show promise for enhanced electromagnetic properties.
  • Demand for efficient energy storage and conversion in capacitors is increasing.

Purpose of the Study:

  • To design and investigate laminated structure meta-capacitors for improved energy storage.
  • To address the limitations of conventional materials in capacitor applications.
  • To explore epsilon-negative behavior in meta-capacitors for enhanced performance.

Main Methods:

  • Fabrication of meta-capacitors using polyvinylidene fluoride (PVDF), barium titanate (BaTiO3), and silver nanowires (AgNWs).
  • Construction of percolation networks to induce plasma oscillation and achieve epsilon-negative behavior.
  • Characterization of dielectric properties, including dielectric constant and loss tangent.

Main Results:

  • The meta-capacitors exhibit significantly enhanced dielectric constant (59.74) compared to pristine PVDF (9.95).
  • Loss tangent was maintained below 0.035, indicating low energy dissipation.
  • Energy storage and discharge density increased by 148% and 133%, respectively, compared to conventional devices.

Conclusions:

  • Laminated structure meta-capacitors offer a viable solution for superior energy storage and conversion efficiency.
  • The developed meta-capacitors demonstrate potential for next-generation energy storage devices.
  • This work provides insights into designing advanced meta-materials for energy applications.