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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Volatile alcohol-responsive visual sensors based on P(HEMA-co-MA)-infiltrated SiO2 inverse opal photonic crystals
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Volatile alcohol-responsive visual sensors based on P(HEMA-co-MA)-infiltrated SiO2 inverse opal photonic crystals

机译：基于P（HEMA-CO-MA） - 过滤SiO2反蛋白硅光子晶体的挥发性酒精响应性视觉传感器

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Functional molecule-infiltrated inverse opal photonic crystals can exhibit reversible photonic stopband shifts as a response to the external environment, which enables them to be promising chemical or biochemical sensors. The present study reports on a copolymer, poly(2-hydroxyethyl methacrylate-co-methyl acrylate), infiltrated SiO2 inverse opal as visual sensor for the detection of volatile alcohols vapors. The constructed sensor generates remarkable stopband red-shifts when exposed to an atmosphere of volatile alcohols. Particularly for isopropanol and butanol, a red-shift of more than 85 nm can be obtained and the color of the sensor changes from green to red, which can be observed by the naked eye. This can be attributed to the increased effective refractive index of the inverse opal caused by the diffusion and adsorption of alcohol molecules into the pores. This is based on a combination of a three-dimensional macroporous structure of the inverse opal and strong affinity of the copolymer to alcohols. The exposure to air can reactivate the sensor because of the volatilization and desorption of alcohols. The selectivity, sensitivity and the reusability of the sensor have been investigated by monitoring the reflectance spectra. The results demonstrate that the prepared sensor can be used as a promising candidate as visual sensors for detecting volatile alcohol vapors.
机译：功能分子渗透逆蛋白石光子光子晶体可以表现出可逆光子阻带换档作为对外部环境的响应，这使得它们能够是有前途的化学或生物化学传感器。本研究报道了共聚物，聚（2-羟乙基甲基丙烯酸甲酯 - 丙烯酸甲酯），渗透的SiO2反相蛋白作为视觉传感器，用于检测挥发性醇蒸气。当暴露于挥发性醇的气氛时，构造的传感器产生了显着的阻带红移。特别是对于异丙醇和丁醇，可以获得超过85nm的红色偏移，并且传感器的颜色从绿色变为红色，这可以通过肉眼观察。这可以归因于由醇分子扩散引起的逆蛋白石的有效折射率增加，并将醇分子吸入孔中。这是基于二维大孔结构的二维常规结构的逆蛋白石和共聚物的强亲和力与醇的组合。由于醇的挥发和解吸，接触空气可以重新激活传感器。通过监测反射谱来研究传感器的选择性，灵敏度和可重用性。结果表明，制备的传感器可用作有希望的候选者作为用于检测挥发性酒精蒸汽的视觉传感器。

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