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February 12, 2026CrystalsOpen Access

Enhanced Dielectric Response and Electric Field-Sensing Properties of PDMS Composites by Graphene/Nitride Heterojunctions: Insights from Experiment and DFT

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Authors

BLBo LiJSJianpeng SunYLYuxing Lei

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Overview

Experimental insights reveal improved electric field-sensing properties in flexible PDMS composites, indicating potential in power systems.

Key Points

  • To investigate the dielectric response and electric field-sensing properties of PDMS composites integrated with graphene/nitride heterojunctions.
  • Prepared graphene/nitride heterojunction powders using AlN, BN, and Si3N4 and embedded in PDMS
  • Analyzed the microstructure using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS)
  • Conducted dielectric spectroscopy across a frequency range of 50 Hz to 50 kHz
  • Performed density functional theory (DFT) calculations to study the graphene/nitride interface
  • The induced voltage amplitude under a 50 Hz electric field increased by approximately 7% for G/PDMS and up to 7.45% for nitride composites
  • Dielectric constant showed typical dispersive behavior and decreased with increased frequency
  • Stable interface structure confirmed with negative binding energies from DFT calculations
  • Mulliken charge transfer indicated significant charge redistribution at the heterojunctions

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/698d6edc5be6419ac0d54c68https://doi.org/10.3390/cryst16020132
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