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<p>Organic molecular ferroelectrics (OMFs) show promise in flexible electronics, but their domain stability under reactive environments remains challenging. By investigating triglycine sulfate (TGS) single crystals in acidic/alkaline conditions, we discover a unique acid-triggered domain reconstruction: regularly aligned “island-like” domains with reversed polarization spontaneously form within upward-polarized matrices under acidic exposure, while remaining absent in alkaline environments. Mechanistic analysis reveals that this phenomenon originates from localized surface chemical reactions. Crucially, we demonstrate that hydrophobic ionic liquid coating effectively preserves domain integrity through hydrogen-bond-mediated surface shielding. This work provides a validated strategy to enhance OMF device reliability in corrosive environments.</p>

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Domain Structure Evolution of Triglycine Sulfate (TGS) Single Crystals in Response to Acidic and Alkaline Environments

  • 期刊论文

  • 发表日期：

    2025年7月7日

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  • Liufang Chen,
  • Jiajun Feng,
  • He Ma,
  • Chuanfu Li,
  • Minhua Ju,
  • Junhu Zhang

摘要

Organic molecular ferroelectrics (OMFs) show promise in flexible electronics, but their domain stability under reactive environments remains challenging. By investigating triglycine sulfate (TGS) single crystals in acidic/alkaline conditions, we discover a unique acid-triggered domain reconstruction: regularly aligned “island-like” domains with reversed polarization spontaneously form within upward-polarized matrices under acidic exposure, while remaining absent in alkaline environments. Mechanistic analysis reveals that this phenomenon originates from localized surface chemical reactions. Crucially, we demonstrate that hydrophobic ionic liquid coating effectively preserves domain integrity through hydrogen-bond-mediated surface shielding. This work provides a validated strategy to enhance OMF device reliability in corrosive environments.