Cai Jingxuan, Zhang Cuiping, Khan Arshad, Liang Chuwei, Li Wen-Di
Department of Mechanical Engineering, The University of Hong Kong Pokfulam Hong Kong China.
HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI) Hangzhou 311300 Zhejiang China
RSC Adv. 2018 Jan 30;8(10):5312-5320. doi: 10.1039/c7ra13516e. eCollection 2018 Jan 29.
A new structure of a flexible, transparent polyaniline (PANI) ammonia gas sensor is reported. The sensor features a hierarchical nanostructured PANI polymer arranged in a micromesh, exhibiting excellent chemiresistive sensitivity to ammonia gas and near-neutral color transparency. The PANI mesh is embedded in a flexible substrate and therefore exhibits superior mechanical stability against peeling and bending. These merits make it a promising candidate for application in wearable electronics. Moreover, the PANI mesh sensor is fabricated through a cost-effective, solution-based strategy that enables vacuum-free fabrication of a sacrificial catalytic copper mesh followed by polymerization, and this strategy is scalable for high-volume production. We demonstrate the high-performance resistive sensing of ammonia gas with concentrations from 2.5 ppb to 100 ppm using this flexible PANI mesh sensor with an excellent transparency of 88.4% at 600 nm wavelength. Furthermore, no significant degradation in the sensing performance occurs after 1000 bending cycles.
报道了一种新型的柔性透明聚苯胺（PANI）氨气传感器结构。该传感器的特点是具有排列成微网的分级纳米结构聚苯胺聚合物，对氨气表现出优异的化学电阻灵敏度和近中性颜色透明度。聚苯胺微网嵌入柔性基板中，因此在抗剥离和抗弯曲方面表现出卓越的机械稳定性。这些优点使其成为可穿戴电子产品应用的有前途的候选者。此外，聚苯胺微网传感器是通过一种经济高效的基于溶液的策略制造的，该策略能够在无真空的情况下制造牺牲催化铜网，然后进行聚合，并且这种策略可扩展用于大规模生产。我们使用这种柔性聚苯胺微网传感器展示了对浓度从2.5 ppb到100 ppm的氨气的高性能电阻传感，在600 nm波长下具有88.4%的优异透明度。此外，在1000次弯曲循环后，传感性能没有明显下降。
