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Self-powered liquid chemical sensors based on solid–liquid contact electrification
Analyst ( IF 3.6 ) Pub Date : 2021-1-18 , DOI: 10.1039/d0an02126a Zhihua Ying 1, 2, 3, 4, 5 , Yin Long 1, 2, 3, 4 , Fan Yang 1, 2, 3, 4 , Yutao Dong 1, 2, 3, 4 , Jun Li 1, 2, 3, 4 , Ziyi Zhang 1, 2, 3, 4 , Xudong Wang 1, 2, 3, 4
Analyst ( IF 3.6 ) Pub Date : 2021-1-18 , DOI: 10.1039/d0an02126a Zhihua Ying 1, 2, 3, 4, 5 , Yin Long 1, 2, 3, 4 , Fan Yang 1, 2, 3, 4 , Yutao Dong 1, 2, 3, 4 , Jun Li 1, 2, 3, 4 , Ziyi Zhang 1, 2, 3, 4 , Xudong Wang 1, 2, 3, 4
Affiliation
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Triboelectric nanogenerators (TENGs) have attracted many research endeavors as self-powered sensors for force, velocity, and gas detection based on solid–solid or solid–air interactions. Recently, triboelectrification at liquid–solid interfaces also showed intriguing capability in converting physical contacts into electricity. Here, we report a self-powered triboelectric sensor for liquid chemical sensing based on liquid–solid electrification. As a liquid droplet passed across the tribo-negative sensor surface, the induced surface charge balanced with the electrical double layer charge in the liquid droplet. The competition between the double layer charge and surface charge generated characteristic positive and negative voltage spikes, which may serve as a “binary feature” to identify the chemical compound. The sensor showed distinct sensitivity to three amino acids including glycine, lysine and phenylalanine as a function of their concentration. The versatile sensing ability was further demonstrated on several other inorganic and organic chemical compounds dissolved in DI water. This work demonstrated a promising sensing application based on the triboelectrification principle for biofluid sensor development.
中文翻译：
基于固液接触带电的自供电式液体化学传感器
摩擦电动纳米发电机（TENGs）作为基于固体-固体或固体-空气相互作用的力，速度和气体检测的自供电传感器，吸引了许多研究努力。最近，在液固界面上的摩擦起电也显示出将物理接触转化为电能的有趣能力。在这里，我们报告了一种基于液固带电的用于液体化学传感的自供电摩擦电传感器。当液滴穿过摩擦负传感器表面时，感应的表面电荷与液滴中的双电荷层平衡。双层电荷和表面电荷之间的竞争产生了特征性的正负尖峰电压，这可以用作识别化合物的“二元特征”。该传感器对包括甘氨酸，赖氨酸和苯丙氨酸的三种氨基酸表现出不同的灵敏度，这是它们的浓度的函数。对于溶解在去离子水中的其他几种无机和有机化合物，进一步证明了其多功能的检测能力。这项工作展示了基于摩擦带电原理的生物流体传感器开发的有前途的传感应用。
更新日期：2021-01-29
中文翻译：
基于固液接触带电的自供电式液体化学传感器
摩擦电动纳米发电机（TENGs）作为基于固体-固体或固体-空气相互作用的力，速度和气体检测的自供电传感器，吸引了许多研究努力。最近，在液固界面上的摩擦起电也显示出将物理接触转化为电能的有趣能力。在这里，我们报告了一种基于液固带电的用于液体化学传感的自供电摩擦电传感器。当液滴穿过摩擦负传感器表面时，感应的表面电荷与液滴中的双电荷层平衡。双层电荷和表面电荷之间的竞争产生了特征性的正负尖峰电压，这可以用作识别化合物的“二元特征”。该传感器对包括甘氨酸，赖氨酸和苯丙氨酸的三种氨基酸表现出不同的灵敏度，这是它们的浓度的函数。对于溶解在去离子水中的其他几种无机和有机化合物，进一步证明了其多功能的检测能力。这项工作展示了基于摩擦带电原理的生物流体传感器开发的有前途的传感应用。
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