Highly Stretchable Fully-Printed CNT-Based Electrochemical Sensors and Biofuel Cells: Combining Intrinsic and Design-Induced Stretchability.
Highly Stretchable Fully-Printed CNT-Based Electrochemical Sensors and Biofuel Cells: Combining Intrinsic and Design-Induced Stretchability.
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DOI：
10.1021/acs.nanolett.5b04549
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发表时间：
2016-01-13
期刊：
影响因子：
10.8
通讯作者：
Wang J
中科院分区：
文献类型：
--
作者：
Bandodkar AJ;Jeerapan I;You JM;Nuñez-Flores R;Wang J
我们提出了第一个例子，一个全印刷的，廉价的，高度可拉伸的碳纳米管为基础的电化学传感器和生物燃料电池阵列。利用特别定制的丝网可印刷可拉伸油墨的协同效应使印刷的装置能够具有两个程度的拉伸性，所述油墨将CNT的有吸引力的电和机械性质与作为粘合剂的聚氨酯的弹性体性质沿着明智设计的独立式蛇形图案相结合。由于这些协同设计和基于纳米材料的墨水效应，该设备能够承受极高水平的应变（高达500%应变），对其结构完整性和性能的影响可以忽略不计。这代表了迄今为止报道的印刷装置提供的最高拉伸性。印刷器件的广泛的电化学表征表明，重复拉伸，扭转和压痕应力对其电化学性能的影响可以忽略不计。该平台的广泛适用性，以实现高度可拉伸的碳纳米管为基础的电化学传感器和生物燃料电池已被证明通过制造和表征电位铵传感器，安培酶为基础的葡萄糖传感器，酶葡萄糖生物燃料电池和自供电生物传感器。因此，使用印刷的CNT阵列可以实现高度可拉伸的可印刷多分析物传感器、多燃料生物燃料电池或其任何组合。本质上可拉伸的基于纳米材料的印刷电极和耐应变的设计图案的这种组合对于创造一类有吸引力的廉价多功能、高度可拉伸的印刷装置具有相当大的希望，所述印刷装置满足其中对极端机械变形的弹性是强制性的各种医疗保健和能源领域的要求。
We present the first example of an all-printed, inexpensive, highly stretchable CNT-based electrochemical sensor and biofuel cell array. The synergistic effect of utilizing specially tailored screen printable stretchable inks that combine the attractive electrical and mechanical properties of CNTs with the elastomeric properties of polyurethane as a binder along with a judiciously designed free-standing serpentine pattern enables the printed device to possess two degrees of stretchability. Owing to these synergistic design and nanomaterial-based ink effects, the device withstands extremely large levels of strains (upto 500% strain) with negligible effect on its structural integrity and performance. This represents the highest stretchability offered by a printed device reported to date. Extensive electrochemical characterization of the printed device reveal that repeated stretching, torsional twisting and indenting stress has negligible impact on its electrochemical properties. The wide-range applicability of this platform to realize highly stretchable CNT-based electrochemical sensors and biofuel cells has been demonstrated by fabricating and characterizing potentiometric ammonium sensor, amperometric enzyme-based glucose sensor, enzymatic glucose biofuel cell and self-powered biosensor. Highly stretchable printable multi-analyte sensor, multi-fuel biofuel cell or any combination thereof can thus be realized using the printed CNT array. Such combination of intrinsically-stretchable printed nanomaterial-based electrodes and strain-enduring design patterns holds considerable promise for creating an attractive class of inexpensive multi-functional, highly stretchable printed devices that satisfy the requirements of diverse healthcare and energy fields wherein resilience towards extreme mechanical deformations is mandatory.