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ater-Soluble Chemical Vapor Detection Enabled by Doctor-Blade-Coated Macroporous Photonic Crystals
Sensors ( IF 3.9 ) Pub Date : 2020-09-25 , DOI: 10.3390/s20195503
Min-Fang Wu , Hui-Ping Tsai , Chia-Hua Hsieh , Yi-Cheng Lu , Liang-Cheng Pan , Hongta Yang

Water-soluble chemicals, involving a wide range of toxic chemicals in aqueous solutions, remain essential in both daily living or industrial uses. However, most toxicants are evaporated with water through their use and thus cause deleterious effects on the domestic environment and health in humans. Unfortunately, most current low-dose chemical vapor detection technologies are restricted by the use of sophisticated instruments and unable to promptly detect the quantity of diverse toxicants in a single analysis. To address these issues, this study reports the development of simple and fast chemical vapor detection using doctor-blade-coated macroporous poly(2-hydroxyethyl methacrylate)/poly(ethoxylated trimethylolpropane triacrylate) photonic crystals, in which the poly(2-hydroxyethyl methacrylate) has strong affinity to insecticide vapor owing to a favorable Gibbs free energy change for their mixing. The condensation of water-soluble chemical vapor therefore results in a significant reflection peak shift and an obvious color change. The visual colorimetric readout can be further improved by increasing the lattice spacing of the macroporous photonic crystals. Furthermore, the dependence of the reflection peak position on vapor pressure under actual conditions and the reproducibility of vapor detecting are also evaluated in this study.

中文翻译:

涂有刮刀涂层的大孔光子晶体实现了可溶于水的化学蒸气检测

在日常生活或工业用途中,水溶性化学物质在水溶液中都涉及多种有毒化学物质,仍然是必不可少的。但是,大多数有毒物质通过使用会随水蒸发,从而对家庭环境和人类健康造成有害影响。不幸的是,当前大多数低剂量化学蒸气检测技术都受到使用精密仪器的限制,无法在一次分析中迅速检测出多种有毒物质的数量。为了解决这些问题,这项研究报告了使用刮刀涂层的大孔聚甲基丙烯酸2-羟乙酯/聚乙氧基化三羟甲基丙烷三丙烯酸酯光子晶体的简单快速化学气相检测的发展,其中聚(甲基丙烯酸2-羟乙酯)对杀虫剂蒸气具有很强的亲和力,这归因于其混合时吉布斯自由能的变化。因此,水溶性化学蒸气的冷凝导致明显的反射峰位移和明显的颜色变化。通过增加大孔光子晶体的晶格间距,可以进一步改善视觉色度读数。此外,本研究还评估了实际条件下反射峰位置对蒸气压的依赖性以及蒸气检测的可重复性。通过增加大孔光子晶体的晶格间距,可以进一步改善视觉色度读数。此外,本研究还评估了实际条件下反射峰位置对蒸气压的依赖性以及蒸气检测的可重复性。通过增加大孔光子晶体的晶格间距,可以进一步改善视觉色度读数。此外,本研究还评估了实际条件下反射峰位置对蒸气压的依赖性以及蒸气检测的可重复性。
更新日期:2020-09-25
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