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Honeycomb structured porous films from a platinum porphyrin-grafted poly(styrene-co-4-vinylpyridine) copolymer as an optical oxygen sensor
Sensors and Actuators B: Chemical ( IF 8.4 ) Pub Date : 2017-11-11 , DOI: 10.1016/j.snb.2017.11.042
Yongyun Mao , Zhipeng Mei , Jiayue Wen , Gang Li , Yanhong Tian , Bingpu Zhou , Yanqing Tian

The rational design and realization of revolutionary sensing films for improving the sensitivity and photo-stability of oxygen sensors have been long-standing challenges. We presented a facile approach for the fabrication of honeycomb structured porous films for optical oxygen sensors using a platinum porphyrin-grafted poly(styrene-co-4-vinylpyridine) (PtTFPP-PSVP) copolymer. Honeycomb porous films were prepared by the “Breath figure method”, which provides an efficient and cost-effective method to produce highly ordered honeycomb patterns in PtTFPP-PSVP copolymer films at sub-micrometer dimensions. Importantly, the application of these ordered honeycomb structured porous films as oxygen sensors afford exceptional improvement in sensitivity performance and exhibited 200% higher sensitivity than the solid sensing film owing to the higher accessibility of gas molecules and larger specific surface area. Furthermore, the photo-bleaching of sensor molecules for PtTFPP grafted to PSVP copolymer films could also be effectively alleviated and the sensors’ photo-stability was significantly improved compared with the physically incorporated PtTFPP into the same PSVP copolymer. Interestingly, the remarkably light intensity-changing characteristic of the sensing film under lower O2 partial pressures facilitates convenient identification of O2 concentrations even with the naked eye. We believe that the proposed honeycomb structured porous film could be a promising candidate in various oxygen sensing fields such as nearly anoxic systems, unsteady pressure measurements and unsteady flow visualization, etc. Additionally, the “Breath figure method”, owing to its simplicity, high reproducibility and easy processability, is expected to be readily applicable to a rich variety of other high performance gas sensor devices.



中文翻译:

蜂窝结构从一铂卟啉-接枝的聚多孔膜(苯乙烯--4-乙烯基吡啶)共聚物作为光学氧传感器

合理设计和实现革命性的传感膜以提高氧气传感器的灵敏度和光稳定性一直是长期的挑战。我们提出了一种简便的方法,该方法使用铂卟啉接枝的聚(苯乙烯-co-4-乙烯基吡啶)(PtTFPP-PSVP)共聚物制造用于光学氧传感器的蜂窝结构多孔膜。蜂窝多孔膜是通过“呼吸图法”制备的,该方法提供了一种有效且具有成本效益的方法,可在亚微米尺寸的PtTFPP-PSVP共聚物膜中生产高度有序的蜂窝图案。重要的,这些有序蜂窝结构多孔膜作为氧气传感器的应用在灵敏度性能方面提供了出色的改善,并且由于具有更高的气体分子可及性和更大的比表面积,因此其灵敏度比固体传感膜高200%。此外,与物理掺入到同一PSVP共聚物中的PtTFPP相比,也可以有效地缓解接枝到PSVP共聚物膜上的PtTFPP传感器分子的光漂白,并且显着提高了传感器的光稳定性。有趣的是,在低O下感测膜的显着光强变化特性 与物理掺入PtTFPP到同一PSVP共聚物中相比,也可以有效地减轻接枝到PSVP共聚物膜上的PtTFPP传感器分子的光致漂白,并且显着提高了传感器的光稳定性。有趣的是,在低O下感测膜的显着光强变化特性 与物理掺入PtTFPP的PSVP共聚物相比,接枝到PSVP共聚物薄膜上的PtTFPP的传感器分子的光漂白也可以得到有效缓解,并且传感器的光稳定性得到显着改善。有趣的是,在低O下感测膜的显着光强变化特性2分压甚至可以用肉眼方便地识别O 2浓度。我们认为,所提出的蜂窝结构多孔膜可能在各种氧气传感领域(如近乎缺氧的系统,不稳定压力测量和不稳定流动可视化等)中成为有前途的候选者。此外,“呼吸图法”由于其简单,高度预计可重复性和易于加工性将很容易应用于多种其他高性能气体传感器设备。

更新日期:2017-11-11
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