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Redox Capacitor to Establish Bio-Device Redox-Connectivity

机译：氧化还原电容器建立生物设备氧化还原连接性

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Electronic devices process information and transduce energy with electrons,white biology performs such operations with ions and chemicals. To establish bio-device connectivity, we fabricate a redox-capacitor film from a polysaccharide (I.e., chitosan) and a redox-active catechol. We report that these films are rapidly and repeatedly charged and discharged electrochemically via a redox-cycling mechanism in which mediators shuttle electrons between the electrode and film (capacitance = 40 F/g or 2.9 mF/cm~2). Further, charging and discharging can be executed under bio-relevant conditions. Enzymaticcharging is achieved by electron-transfer from glucose to the film via an NADPH-mediated redox-cycling mechanism. Discharging occurs by electrondonation to O_2 to generate H_2O_2 that serves as substrate for peroxidasemediated biochemical reactions. Thus, these films offer the capability of inter-converting electrochemical and biochemical inputs/outputs. Among potential applications, we anticipate that catechol-chitosan redox-capacitor films could serve as circuit elements for molecular logic operations or for transducing bio-based chemical energy into electricity.
机译：电子设备通过电子来处理信息并转换能量，白色生物利用离子和化学物质执行此类操作。为了建立生物设备的连通性，我们用多糖（即壳聚糖）和氧化还原活性邻苯二酚制成氧化还原电容器膜。我们报道了这些膜通过氧化还原循环机制快速而反复地进行电化学充电和放电，其中介体在电极和膜之间穿梭电子（电容= 40 F / g或2.9 mF / cm〜2）。此外，可以在生物相关条件下执行充电和放电。酶促充电是通过NADPH介导的氧化还原循环机制将葡萄糖从电子转移到薄膜上实现的。放电是通过电子给O_2产生的，从而生成H_2O_2，H_2O_2作为过氧化物酶介导的生化反应的底物。因此，这些薄膜提供了相互转换电化学和生化输入/输出的能力。在潜在的应用中，我们预计儿茶酚-壳聚糖氧化还原电容器膜可以用作分子逻辑操作或将基于生物的化学能转化为电能的电路元件。

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  • 来源
    《Advanced Functional Materials》 |2012年第7期|p.1409-1416|共8页
  • 作者

    Eunkyoung Kim; Yi Liu; William E. Bentley; Gregory F. Payne;

  • 作者单位

    Institute for Bioscience and Biotechnology Research and Fischell Department of Bioengineering 5115 Plant Sciences Buildin,University of Maryland College Park, MD 20742, USA;

    Institute for Bioscience and Biotechnology Research and Fischell Department of Bioengineering 5115 Plant Sciences Buildin,University of Maryland College Park, MD 20742, USA;

    Institute for Bioscience and Biotechnology Research and Fischell Department of Bioengineering 5115 Plant Sciences Buildin,University of Maryland College Park, MD 20742, USA;

    Institute for Bioscience and Biotechnology Research and Fischell Department of Bioengineering 5115 Plant Sciences Buildin,University of Maryland College Park, MD 20742, USA;

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