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<p>We observe a significant influence of ionic incorporation on the structural, optical, thermal, and electrical properties of amino acid–based functional materials in Glycine: NaCl composites. UV–Vis spectroscopy revealed a blue shift in the absorption edge and modification of the optical transparency, indicating molecular–ionic interactions and defect-level formation. Thermal analysis (TGA–DTA) showed improved stability and altered phase-transition behavior, confirming that NaCl disrupts the hydrogen-bonding environment of glycine. Dielectric measurements exhibited enhanced permittivity (10<sup>8</sup>), strong dispersion, and increased dielectric loss, attributed to dipolar, ionic, and Maxwell–Wagner interfacial polarization. The Cole-Cole plots confirmed non-Debye relaxation and distinct grain and grain-boundary contributions. Nonlinear I-V characteristics and temperature-dependent resistance measurements further evidenced mixed ionic–electronic conduction with hopping based transport mechanism, while heating–cooling resistance hysteresis revealed reversible microstructural and orientational changes. The results highlight Glycine: NaCl composites as promising candidates for low-power electronic components, thermal–electrical switching elements, and bio-compatible sensing applications.</p>

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Structure–property correlations in glycine-NaCl composites for possible bio-sensing application

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月9日

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  • Arshiya Tabassum,
  • Benson K. Money,
  • Rupam Mukherjee

摘要

We observe a significant influence of ionic incorporation on the structural, optical, thermal, and electrical properties of amino acid–based functional materials in Glycine: NaCl composites. UV–Vis spectroscopy revealed a blue shift in the absorption edge and modification of the optical transparency, indicating molecular–ionic interactions and defect-level formation. Thermal analysis (TGA–DTA) showed improved stability and altered phase-transition behavior, confirming that NaCl disrupts the hydrogen-bonding environment of glycine. Dielectric measurements exhibited enhanced permittivity (108), strong dispersion, and increased dielectric loss, attributed to dipolar, ionic, and Maxwell–Wagner interfacial polarization. The Cole-Cole plots confirmed non-Debye relaxation and distinct grain and grain-boundary contributions. Nonlinear I-V characteristics and temperature-dependent resistance measurements further evidenced mixed ionic–electronic conduction with hopping based transport mechanism, while heating–cooling resistance hysteresis revealed reversible microstructural and orientational changes. The results highlight Glycine: NaCl composites as promising candidates for low-power electronic components, thermal–electrical switching elements, and bio-compatible sensing applications.