基于静电自组装多层膜的新型光纤Hg2+传感器.pdfVIP

2+ 基于静电自组装多层膜的新型光纤 Hg 传感器 1 2 1 * 2 † 殷明杰 ，顾波波 ，钱锦文 ，张阿平 1 ( 教育部高分子合成与功能构造重点实验室, 浙江大学高分子系, 浙江，杭州 310027) 2 （现代光学仪器国家重点实验室，浙江大学光电系，浙江，杭州 310058) 摘要：阳离子聚电解质聚（四乙烯基吡啶盐酸盐）（CPVP）与阴离子聚电解质聚(对苯乙烯 基磺酸钠)（PSS）通过静电层层自组装（ESA）技术组装在细芯光纤模式耦合仪传感器的表 面上，用于检测水中的金属离子。静电层层自组装过程采用紫外光谱（UV-vis）进行了跟踪， 自组装膜的表面形貌通过原子力显微镜（AFM）进行了表征。组装的(CPVP/PSS)10 多层膜的 2+ 2+ 光纤传感器用于检测水溶液中 Hg 。结果表明，(CPVP/PSS)10 光纤传感器对 Hg 具有专一选 择性，具有较好的灵敏度，较低的检测限及快速的响应时间。其检测限达到 10-9 mol/L，响 应时间为 60s。 关键词：光纤传感器；静电层层自组装；聚电解质 2+ Novel Optical Fiber Hg Sensor Based on Electrostatic Self-assembly Multilayers Mingjie Yin1, Bobo Gu 2, Jinwen Qian 1*, and A.Ping Zhang2 † 1 Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China 2 State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310058, China Abstract: A new fiber-optic metal ion sensor is demonstrated by layer-by-layer (LbL) electrostatic self-assembly (ESA) coating of poly (N-ethyl-4-vinylpyridinium chloride) (CPVP) and poly (sodium-p-styrenesulfonate) (PSS) on the surface of a thin-core fiber modal interferometer (TCFMI). The process of layer-by-layer self-assembly was monitored by UV–vis spectrum and the morphology of the multilayer was characterized by atomic force microscopy (AFM). In 2+ addition to the special selectivity to Hg , the sensor shows high sensitivities with different HgCl2