ACS Appl Mater Interfaces. 2018 Sep 19;10(37):31505-31514. doi: 10.1021/acsami.8b13046. Epub 2018 Sep 5.
Flexible zinc oxide (ZnO) nanorod (NR) ultraviolet (UV)/gas dual sensors using silver (Ag) nanoparticle (NP) templates were successfully fabricated on a polyimide substrate with nickel electrodes. Arrays of Ag NPs were used as a template for the growth of ZnO NRs, which could enhance the flexibility and the sensing properties of the devices through the localized surface plasmon resonance (LSPR) effect. The Ag NPs were fabricated by the rapid thermal annealing process of Ag thin films, and ZnO NRs were grown on Ag NPs to maximize the surface area and form networks with rod-to-rod contacts. Because of the LSPR effect by Ag NPs, the UV photoresponse of the ZnO NRs was amplified and the depletion region of ZnO NRs was formed quickly because of the Schottky contact with the Ag NPs. As a consequence, ZnO NR UV/gas dual sensors grown on the Ag NP template with a diameter of 28 nm exhibited the outstanding UV-sensing characteristics with a UV on-off ratio of 3628 and a rising time ( t) and a decay time ( t) of 3.52 and 0.33 s upon UV exposure, along with excellent NO-sensing characteristics with a stable gas on-off ratio of 288.5 and a t and t of 38 and 62 s upon NO exposure. Furthermore, the sensors grown on the Ag NP template exhibited good mechanical flexibility and stable sensing properties without significant degradation even after the bending test up to 10 000 cycles at the bending radius of 5 mm.
在聚酰亚胺衬底上使用镍电极成功制备了基于银（Ag）纳米粒子（NP）模板的柔性氧化锌（ZnO）纳米棒（NR）紫外（UV）/气双传感器。Ag NPs 阵列被用作 ZnO NRs 生长的模板，通过局域表面等离子体共振（LSPR）效应可以增强器件的柔韧性和传感性能。Ag NPs 通过快速热退火工艺制备Ag 薄膜，并在 Ag NPs 上生长 ZnO NRs，以最大限度地增加表面积并形成具有棒对棒接触的网络。由于 Ag NPs 的 LSPR 效应，ZnO NRs 的 UV 光响应得到了放大，并且由于与 Ag NPs 的肖特基接触，ZnO NRs 的耗尽区迅速形成。结果，在直径为 28nm 的 Ag NP 模板上生长的 ZnO NR UV/气双传感器表现出出色的 UV 传感特性，UV 开/关比为 3628，UV 照射下的上升时间（t）和下降时间（t）分别为 3.52 和 0.33s，NO 暴露时具有出色的 NO 传感特性，稳定的气体开/关比为 288.5，t 和 t 分别为 38 和 62s。此外，即使在弯曲半径为 5mm 的情况下，经过多达 10000 次循环的弯曲测试，传感器仍表现出良好的机械柔韧性和稳定的传感性能，没有明显的退化。
