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<p>Hydrogel optical fibers have gained widespread use in signal sensing due to their high sensitivity, non-toxic light-sensing capabilities, and rapid responsiveness. However, different stimuli within the body (e.g., compression, temperature changes, and pH variations) can produce similar effects on their sensing signals, making it challenging to decouple these overlapping signals. Herein, we report a programmable hydrogel optical fiber (PHOF) assembled from various hydrogel-based sensors, where structural reconfiguration is enabled by imine bonding. The PHOF was fabricated using a template-assisted method to ensure structural homogeneity among functional units, resulting in a more uniform structure after subsequent assembly and splicing with minimal impact on optical attenuation (optimal light attenuation: 1.54 ± 0.04 dB/cm). By introducing distinct functional phases, we successfully constructed a multi-responsive sensor capable of detecting stress, temperature, and pH. The development of PHOF based on dynamic covalent bonding offers a strategy for designing smart materials and multiplexed sensors with user-defined functions, holding great promise for significant applications in complex signal sensing.</p>

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Self-healing hydrogel optical fibers with programmable functions for multi-signal sensing and decoupling

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Jiahao Zheng,
  • Zhihao Wang,
  • Guoyin Chen,
  • Kai Hou,
  • Meifang Zhu

摘要

Hydrogel optical fibers have gained widespread use in signal sensing due to their high sensitivity, non-toxic light-sensing capabilities, and rapid responsiveness. However, different stimuli within the body (e.g., compression, temperature changes, and pH variations) can produce similar effects on their sensing signals, making it challenging to decouple these overlapping signals. Herein, we report a programmable hydrogel optical fiber (PHOF) assembled from various hydrogel-based sensors, where structural reconfiguration is enabled by imine bonding. The PHOF was fabricated using a template-assisted method to ensure structural homogeneity among functional units, resulting in a more uniform structure after subsequent assembly and splicing with minimal impact on optical attenuation (optimal light attenuation: 1.54 ± 0.04 dB/cm). By introducing distinct functional phases, we successfully constructed a multi-responsive sensor capable of detecting stress, temperature, and pH. The development of PHOF based on dynamic covalent bonding offers a strategy for designing smart materials and multiplexed sensors with user-defined functions, holding great promise for significant applications in complex signal sensing.