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首页> 外文期刊>Nanotechnology >Continuous graphene and carbon nanotube based high flexible and transparent pressure sensor arrays
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Continuous graphene and carbon nanotube based high flexible and transparent pressure sensor arrays

机译：基于连续石墨烯和碳纳米管的高柔性和透明压力传感器阵列

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The transparent pressure sensing arrays durable to severe deformation are fabricated by covering the continuous graphene sheets on the tip of thermal plastic polyurethane (TPU) pyramids, while most of the TPU surface is covered by a layer of densely entangled single wall carbon nanotubes. The transparency of the conducting layer exceeds 91%. The capacitance variations between TPU surface and flat electrode under compressive deformation show high sensitivity and a broad dynamic range from hundreds Pa to MPa. The measured capacitance variations show high load sensitivity and stability under repeated deformation cycles. Finite element numerical simulations present that the contact area change under deformation increases the capacitance variation. The high stability of the capacitance response to fluctuated loads demonstrates that graphene layer on the surface of TPU pyramids maintains the continuity of electric contact under a large deformation ratio and high repeating cycles. 16 x 16 arrays are connected to a circuit and a typical load distribution is regenerated by mapping the local capacitance variations on the arrays with sub-minimeter spatial resolution.
机译：通过覆盖热塑性聚氨酯（TPU）金字塔锥顶上的连续石墨烯片，可以制造出可承受严重变形的透明压力传感阵列，而大部分TPU表面则被一层紧密缠结的单壁碳纳米管覆盖。导电层的透明度超过91％。在压缩变形下，TPU表面和扁平电极之间的电容变化显示出高灵敏度和数百Pa至MPa的宽动态范围。测得的电容变化在重复变形周期下显示出高负载灵敏度和稳定性。有限元数值模拟表明，变形下的接触面积变化会增加电容变化。电容对负载波动的响应具有很高的稳定性，这表明TPU金字塔表面上的石墨烯层在较大的变形比和较高的重复周期下仍保持电接触的连续性。 16 x 16阵列连接到电路，并通过以亚厘米的空间分辨率映射阵列上的局部电容变化来重新生成典型的负载分布。

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