Abstract In this paper, different types of binary gases were detected by the silica photonic crystals (PCs). It is found that the regulation of gas sensing is very different when silica PCs exposure to different types of binary gases. Here, silica PCs were prepared by the vertical deposition method. The performance of gas sensing was monitored by the shift of photonic band gap (PBG) of PCs. It is noteworthy that we convert the shift of PBG into the volume fraction of adsorption in order to investigate the adsorption behavior. For small-molecule gases, the maximum of adsorption volume fraction of binary gases is smaller than two of the single gases. While for volatile organic compounds (VOCs), the maximum of adsorption volume fraction of binary gases locates between the two individual gases. The different types of gases follow different adsorption model, which are discussed in this work.

中文翻译：

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用于二元气体的二氧化硅光子晶体的气体传感

摘要 本文利用二氧化硅光子晶体（PCs）检测了不同类型的二元气体。发现当二氧化硅PC暴露于不同类型的二元气体时，气体传感的调节是非常不同的。在这里，二氧化硅 PC 是通过垂直沉积方法制备的。气体传感的性能通过 PC 的光子带隙 (PBG) 的位移来监测。值得注意的是，为了研究吸附行为，我们将 PBG 的位移转化为吸附的体积分数。对于小分子气体，二元气体的最大吸附体积分数小于两种单一气体。而对于挥发性有机化合物（VOCs），二元气体的最大吸附体积分数位于两种气体之间。