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首页> 外文期刊>Advanced Functional Materials >Oriented Strontium Carbonate Nanocrystals within Collagen Films for Flexible Piezoelectric Sensors
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Oriented Strontium Carbonate Nanocrystals within Collagen Films for Flexible Piezoelectric Sensors

机译：柔性压电传感器的胶原膜内定向碳酸锶纳米晶体

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摘要

Bone, assembled by mineralized collagen fibrils, displays piezoelectric properties under external stimulation to affect tissue growth. The mineralized collagen fibrils consist of collagen and oriented inorganic nanocrystals. Inspired from the unique structures and piezoelectric effect of mineralized collagen fibrils, the intrafibrillar mineralization of oriented strontium carbonate nanocrystals is achieved in vitro, which also exhibits good piezoelectric properties. The amorphous strontium carbonate precursors penetrate from the gap zones and fill gradually into the whole space within the collagen fibrils, and transform into a co-oriented crystalline phase. Isolated mineralized collagen fibrils with organized SrCO3 nanocrystals acquire good flexible properties and inverse piezoelectric responses with an effective piezoelectric coefficient of 3.45 pm V-1, much higher than individual collagen (1.12 pm V-1) and SrCO3 crystals (0.092 pm V-1). These results may indicate that the organic and inorganic components synergistically contribute to the piezoelectric effect of bone. Furthermore, devices of flexible piezoelectric thin films assembled by SrCO3 mineralized collagen fibrils exhibit a regular open-circuit voltage of 1.2 V under compressive stress and a stable cycling short-circuit current of 80 nA under a bending mode. It can also facilitate the development of promising piezoelectric sensors.
机译：由矿化胶原纤维组装组装的骨骼，在外部刺激下显示压电性能以影响组织生长。矿化胶原型原纤维由胶原蛋白和取向的无机纳米晶体组成。灵感来自矿化胶原型原纤维的独特结构和压电效果，在体外实现了取向锶碳酸锶纳米晶体的intrafirlarlar矿化，这也表现出良好的压电性能。无定形锶碳酸锶前体从间隙区域渗透并逐渐填充到胶原型原纤维内的整个空间中，并转化成共同的结晶相。分离的矿化胶原纤维组织SRCO3纳米晶体获得良好的柔性性能和逆压电响应，其有效压电系数为3.45μmV-1，远高于单个胶原（1.12PM V-1）和Srco3晶体（0.092MPV-1） 。这些结果可能表明有机和无机组分协同促进骨的压电效应。此外，通过Srco3矿化胶原型原纤维组装的柔性压电薄膜的装置在压缩应力下具有1.2V的常规开路电压，并且在弯曲模式下稳定的循环短路电流为80na。它还可以促进有前途的压电传感器的发展。

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  • 来源
    《Advanced Functional Materials》 |2021年第45期|2105806.1-2105806.11|共11页
  • 作者

    Fang Weijian; Ping Hang; Li Xinhui; Liu Xiaofei; Wan Fuqiang; Tu Bingtian; Xie Hao; OReilly Patraic; Wang Hao; Wang Weimin; Fu Zhengyi;

  • 作者单位

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol Sch Chem Chem Engn & Life Sci Wuhan 430070 Peoples R China;

    Mol Vista Inc 6840 Via Oro Suite 110 San Jose CA 95119 USA;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Luoshi Rd 122 Wuhan 430070 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    collagen fibrils; intrafibrillar mineralization; oriented nanocrystals; piezoelectric property; strontium carbonate;

    机译：胶原蛋白原纤维;intrafirlarlar矿化;取向纳米晶体;压电性质;碳酸锶;

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