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Flexible printed humidity sensor based on poly(3,4-ethylenedioxythiophene)/reduced graphene oxide/Au nanoparticles with high performance
Composites Science and Technology ( IF 9.1 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.compscitech.2018.09.013
Rongjin Zhang , Bo Peng , Yan Yuan

Abstract Wearable and flexible humidity-sensing devices are essential for the real-time monitoring of air humidity in health and environmental applications. We propose a flexible sensor based on a conductive polymer comprising poly(3,4-ethylenedioxythiophene) (PEDOT) and reduced graphene oxide(rGO) to monitor changes in humidity. GO was used as a hard template for the in situ polymerization of EDOT to obtain PEDOT:rGO. Then, PEDOT:rGO-PEI/Au nanoparticles (NPs) ink was prepared through the in situ reduction of Au NPs modified with polyethylenimine (PEI). The ink was printed on the surface of a hydrophilic modified polyethylene terephthalate (PET) substrate using an ink-jet printer to form a specific pattern. After assembly, a PET-based PEDOT:rGO-PEI/Au NPs (PrGANPs) sensor device with high electrical performance, transparency, and sensitivity was obtained for testing at a variety of RH levels. The prepared PET-based PrGANPs sensor printed with 50 layers had a transmittance up to 61% at 500 nm. And the response and recovery times were approximately 20 and 35 s at 98% RH, respectively. Stability was maintained even after bending 200 times, and the sensor could respond within the humidity range of 11%–98% RH, while in response to a wide resistance range of 7.41%–51.60%.

中文翻译:

基于聚(3,4-乙撑二氧噻吩)/还原氧化石墨烯/金纳米颗粒的高性能柔性印刷湿度传感器

摘要 可穿戴且灵活的湿度传感设备对于健康和环境应用中的空气湿度实时监测至关重要。我们提出了一种基于导电聚合物的柔性传感器,该聚合物包含聚(3,4-乙撑二氧噻吩)(PEDOT)和还原氧化石墨烯(rGO),以监测湿度变化。GO被用作EDOT原位聚合的硬模板以获得PEDOT:rGO。然后,通过原位还原用聚乙烯亚胺 (PEI) 改性的 Au NPs 制备了 PEDOT:rGO-PEI/Au 纳米颗粒 (NPs) 墨水。使用喷墨打印机将墨水打印在亲水改性聚对苯二甲酸乙二醇酯 (PET) 基材的表面上以形成特定图案。组装后,基于 PET 的 PEDOT:rGO-PEI/Au NPs (PrGANPs) 传感器器件具有高电性能、透明度、并获得了在各种 RH 水平下进行测试的灵敏度。所制备的基于 PET 的 PrGANPs 传感器印刷有 50 层,在 500 nm 处的透射率高达 61%。在 98% RH 下,响应时间和恢复时间分别约为 20 秒和 35 秒。即使在弯曲 200 次后仍保持稳定性,传感器可以在 11%–98% RH 的湿度范围内响应,同时响应 7.41%–51.60% 的宽电阻范围。
更新日期:2018-11-01
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