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A self-powered triboelectric nanosensor for detecting the corrosion state of magnesium treated by micro-arc oxidation

机译：一种自供电的摩擦电纳米传感器，用于检测微弧氧化处理后的镁的腐蚀状态

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Magnesium (Mg) is frequently used as a biocompatible implantable material in the human body, but real-time detection of its corrosion state is not well understood. Fortunately, previous studies of triboelectric nanogenerators (TENG) as self-driven sensors in many fields have proposed solutions for this problem. In this work, Mg-based TENG was prepared as a self-driven sensor to detect the corresponding corrosion state of Mg treated by micro-arc oxidation (MAO-Mg). Mg-based sheets and polydimethylsiloxane (PDMS) film were used as triboelectric materials. The output of TENG was optimal under 350 V–800 Hz micro-arc oxidation (MAO) treatment of Mg, and the V _(oc) , I _(sc) and Q _(sc) were 48.5 V, 35.3 μA and 44.2 nC, which were respectively 2.42, 3.42 and 3.27 times that of the untreated devices. Moreover, a linear relationship was found in simulated body fluid (SBF) immersion tests, showing that the rates of decrease in I _(sc) and V _(oc) were respectively 3.48 and 2.74 times the weight reduction rates of MAO-Mg sheets, indicating that our sensors successfully detected the corrosion of MAO-Mg. This work will lay a preliminary foundation for real-time detection of Mg as an implant in the human body (as do other implantable materials), and demonstrates a potential new application for TENG in the biomedical field.
机译：镁（Mg）经常在人体中用作生物相容性可植入材料，但对其腐蚀状态的实时检测尚不清楚。幸运的是，以前在许多领域中将摩擦电纳米发电机（TENG）用作自驱动传感器的研究为该问题提出了解决方案。在这项工作中，准备了基于Mg的TENG作为自驱动传感器，以检测通过微弧氧化（MAO-Mg）处理的Mg的相应腐蚀状态。镁基片和聚二甲基硅氧烷（PDMS）膜用作摩擦电材料。在镁的350 V–800 Hz微弧氧化（MAO）处理下，TENG的输出是最佳的，并且V _（oc），I _（sc）和Q _（sc）分别为48.5 V，35.3μA和44.2 nC分别是未处理设备的nC的2.42、3.42和3.27倍。此外，在模拟体液（SBF）浸入测试中发现线性关系，表明I _（sc）和V _（oc）的降低率分别是MAO-Mg片材减重率的3.48和2.74倍，表明我们的传感器成功检测到MAO-Mg的腐蚀。这项工作将为实时检测人体中的植入物Mg（以及其他可植入材料）奠定基础，并证明TENG在生物医学领域的潜在新应用。

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