【摘要】 用静电自组装的方法在长周期光栅的表面制备了聚二甲基二烯丙基氯化铵/聚苯乙烯磺酸钠(PDDA/PSS)膜,并研究了它们对空气中湿度的响应。实验结果表明,随着空气绝对湿度的增加,长周期光栅传输谱的谐振峰波长逐渐向长波方向移动,在25～45℃范围内,饱和蒸气压与谐振峰波长呈现了很好的线性关系,相关系数为0.9727。涂覆PDDA/PSS膜的长周期光栅能感受空气中水蒸气的含量,有望用于制作湿度传感器。更多还原

【Abstract】 We employed electrostatic layer-by-layer self-assembly method to coat poly(diallyldimethylammonium chloride)(PDDA)/poly(sodium styrenesulfonate)(PSS) films on the surface of a long-period fiber grating(LPFG),and addressed their response to the humidity of air.Experimental results show that the central wavelengths in the transmission spectrum gradually shift to long wave with the increase of absolute humidity.A good linear relationship exists between absolute humidity and the central wavelength in the range of 25~45 ℃.A PDDA/PSS coated LPFG therefore has potential application prospect in a humidity sensor.更多还原