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Abstract <p>Over a broad frequency and temperature range, the dielectric characteristics of water contained in 2.5 nm mesoporous nanochannels were investigated. Two noticeable relaxation peaks, dependent on frequency and temperature, were seen in the dielectric tests. Following a thermally stimulated mechanism analogous to that of bulk ice, the glassy transitions of water inside nanochannels cause a low-temperature relaxation. Freezing of water inside the MCM-41 nanochannels is responsible for the non-Arrhenius-type behaviour seen during elevated temperature relaxation (230–280 K).</p>

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Freezing and Glassy Transition of Supercooled Water Confined in Mesoporous Nanochannels

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Saroja Rani Bhupatiraju,
  • K. Tharini,
  • Sirisha Bandi,
  • C. R. Venkateswara Rao

摘要

Abstract

Over a broad frequency and temperature range, the dielectric characteristics of water contained in 2.5 nm mesoporous nanochannels were investigated. Two noticeable relaxation peaks, dependent on frequency and temperature, were seen in the dielectric tests. Following a thermally stimulated mechanism analogous to that of bulk ice, the glassy transitions of water inside nanochannels cause a low-temperature relaxation. Freezing of water inside the MCM-41 nanochannels is responsible for the non-Arrhenius-type behaviour seen during elevated temperature relaxation (230–280 K).