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首页> 外文期刊>ACS applied materials & interfaces >Micropatternable Double-Faced ZnO Nanoflowers for Flexible Gas Sensor
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Micropatternable Double-Faced ZnO Nanoflowers for Flexible Gas Sensor

机译：用于柔性气体传感器的MicroPARTNABLE双面ZnO纳米割草机

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摘要

Micropatternable double-faced (DF) zinc oxide (ZnO) nanoflowers (NFs) for flexible gas sensors have been successfully fabricated on a polyimide (PI) substrate with single-walled carbon nanotubes (SWCNTs) as electrode. The fabricated sensor comprises ZnO nanoshells laid out on a PI substrate at regular intervals, on which ZnO nanorods (NRs) were grown in- and outside the shells to maximize the surface area and form a connected network. This three-dimensional network structure possesses multiple gas diffusion channels and the micropatterned island structure allows the stability of the flexible devices to be enhanced by dispersing the strain into the empty spaces of the substrate. Moreover, the micropatterning technique on a flexible substrate enables highly integrated nanodevices to be fabricated. The SWCNTs were chosen as the electrode for their flexibility and the Schottky barrier they form with ZnO, improving the sensing performance. The devices exhibited high selectivity toward NO2 as well as outstanding sensing characteristics with a stable response of 218.1, fast rising and decay times of 25.0 and 14.1 s, respectively, and percent recovery greater than 98% upon NO2 exposure. The superior sensing properties arose from a combination of high surface area, numerous active junction points, donor point defects in the ZnO NRs, and the use of the SWCNT electrode. Furthermore, the DF-ZnO NF gas sensor showed sustainable mechanical stability. Despite the physical degradation observed, the devices still demonstrated outstanding sensing characteristics after 10 000 bending cycles at a curvature radius of 5 mm.
机译：用于柔性气体传感器的微透过理由的双面（DF）氧化锌（ZnO）纳米割机（NFS）已成功地制造在具有单壁碳纳米管（SWCNT）的聚酰亚胺（PI）底物上制造成电极。制造的传感器包括以规则间隔在PI衬底上布置在PI衬底上的ZnO纳米型，在壳体中生长ZnO纳米棒（NRS）以最大化表面积并形成连接的网络。该三维网络结构具有多个气体扩散通道，并且通过将菌株分散到基板的空间中，微图案岛结构允许柔性装置的稳定性。此外，柔性基板上的微型图像技术使得能够制造高度集成的纳米型。选择SWCNTS作为电极的灵活性，它们与ZnO形成的肖特基屏障，提高了感测性能。该器件对NO2具有高选择性，以及稳定的感测特性，稳定的响应分别为218.1，快速上升和衰减时间为25.0％和14.1秒，在NO2暴露时恢复大于98％。优越的感测性能从高表面积，许多有源​​结点，ZnO NRS中的供体点缺陷的组合来产生，以及SWCNT电极的使用。此外，DF-ZnO NF气体传感器显示可持续的机械稳定性。尽管观察到物理降级，但在曲率半径为5mm的10 000次弯曲循环后，设备仍然表现出优异的感测特性。

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