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Thermal and stress tension dual-responsive photonic crystal nanocomposite hydrogels

机译:热力和应力张力双响应光子晶体纳米复合水凝胶

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摘要

Easily prepared dual-responsive optical nanocomposite hydrogel (ONH) sensors which are responsive to tension and temperature are reported in which polymethyl methacrylate (PMMA) colloidal arrays were embedded into the hydrogels to obtain an optical response. Because of the band gap in the photonic crystal (PhC), the bright color of ONHs can be tuned by an external stimulus according to Bragg's law. Thermosensitive N-isopropyl acrylamide (NiPAm) is added to the gel system, and by controlling NiPAm content and temperature, the contraction of the dual-response ONHs and the structural color response in the visible light range can change accordingly. Meanwhile, the temperature responses can be repeated more than seven times. Owing to the high biocompatibility, the excellent temperature response and the good mechanical strength of the ONHs, such optical biosensors have wide application in the biological field as an external stimulus sensor for implantable sensors, intracorporeal pressure measurement, and body temperature detection.
机译:据报道,易于制备的双响应光学纳米复合水凝胶(ONH)传感器,其响应于张力和温度,其中将聚甲基丙烯酸甲酯(PMMA)胶体阵列嵌入水凝胶中以获得光学响应。由于光子晶体(PHC)中的带隙,根据布拉格的法律,可以通过外部刺激调整ONH的亮色。将热敏N-异丙基丙烯酰胺(NIPAM)加入到凝胶系统中,并通过控制NIPAM含量和温度,双响应ONHS的收缩和可见光范围内的结构颜色响应可以相应地改变。同时,温度响应可以重复超过七次。由于高生物相容性,优异的温度响应和ONH的良好机械强度,这种光学生物传感器在生物区域中具有广泛的应用,作为用于可植入传感器的外部刺激传感器,体内压力测量和体温检测。

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  • 来源
    《RSC Advances》 |2019年第37期|共4页
  • 作者单位

    Beijing Inst Technol Sch Chem &

    Chem Engn Beijing 102488 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn Beijing 102488 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn Beijing 102488 Peoples R China;

    Beijing Inst Technol Sch Chem &

    Chem Engn Beijing 102488 Peoples R China;

    North China Univ Technol Coll Mech &

    Mat Engn Beijing 100144 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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