酸碱气体敏感的反蛋白石光子晶体荧光传感薄膜

Acid-base Gases Sensitive Inverse Opal Photonic Crystal Fluorescence Sensing Film

构筑挥发性酸碱气体检测荧光传感薄膜。利用慢光子效应增强荧光的特性,在具有三维大孔结构的SiO_(2)反蛋白石光子晶体孔隙填充功能有机小分子(HPQ-AC),实现了对NH_(3)和HCl气体的高效连续检测。将所制的传感薄膜置于NH_(3)氛围中,30 s内在496 nm处发射强的荧光。通过选择光子禁带蓝带边与荧光发射波长重叠的光子晶体,实现对NH_(3)的荧光传感;当继续暴露于HCl气体氛围中,光子晶体传感薄膜的荧光发生猝灭,实现了对HCl气体的高效检测。所构筑的反蛋白石光子晶体薄膜实现了对酸碱气体的连续检测,也为开发其他气体荧光传感器提供了思路。

An acid-base gases sensitive fluorescence sensing film was constructed by using the fluorescence enhancement derived from slow photon effect of photonic crystal to achieve the efficiently continuous detection of NH_(3)and HCl vapors,in which a functional organic small molecule(HPQ-AC)was infiltrated into the voids of the SiO_(2)inverse opal photonic crystal with three-dimensional micropores structure.When the sensing film was placed in ammonia atmosphere,strong fluorescence was emitted at 496 nm in 30 seconds.By selecting a photonic crystal whose blue-band edge of the photonic stopband overlapped with the fluorescence emission wavelength,the fluorescence sensing of NH_(3)was realized based on significant enhancement of the emitted fluorescence from slow photon effect.The constructed inverse opal photonic crystal film can realize the continuous detection of acid and base gases,providing a new strategy for the development of fluorescence sensors for other gases.