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纳米银修饰的微结构聚合物光纤作为化学-光学传感材料的初步研究 总被引:5,自引:5,他引:0
通过调节在微结构聚合物纤维(Microtubes Polymer Opeical Fibers,MPOF)孔道中进行的动态化学反应——银镜反应的条件,可以得到管状或岛状纳米Ag修饰的MPOF.扫描电镜分析显示:在高反应物浓度下,在孔洞阵列中进行反应得到管状银修饰的MPOF;该Ag微管-MPOF复合纤维是导电性的,可以直接作为阵列电极制造电化学传感器.研究结果显示,MPOF复合纤维对治癌物质硝酸根或亚硝酸根有高的可逆氧化还原活性;在低反应物浓度下,在孔洞阵列中进行反应得到岛状银修饰MPOF;当把岛状银修饰MPOF插入有机荧光物质的水溶液中时,观察到荧光有明显的增强效应. 相似文献
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通过对柚子型微结构光纤Bragg光栅的多个反射峰的温度和应变传感特性进行的理论和实验 研究,得出柚子型微结构光纤Bragg光栅的反射波长与温度呈二次关系,且理论和实验二者 吻合较好; 同时发现每个反射峰的温度灵敏度不同.理论分析柚子型微结构光纤Bragg光栅的 反射波长与应变呈线性关系,实验得到了该种Bragg光栅的反射波长与应变的线性关系,实 验结果与理论分析相吻合.由于微结构光纤光栅反射谱中多个峰对温度和应变等物理量敏感 度不一致,这种Bragg光栅更适合应用到多参量传感领域.
关键词:
微结构光纤
光纤Bragg光栅
温度传感
应变传感 相似文献
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光纤传感物理及其应用 总被引:1,自引:0,他引:1
光纤传感器是近十年来迅速发展起来的一种新型传感器.它具有抗电磁干扰、电绝缘性好、灵敏度高、重量轻等一系列优点,因而具有广阔的应用前景.目前已有测量温度、压力、位移、电流、电压等多种物理量的光纤传感器问世.本文介绍了振幅(强度)调制、相位调制、偏振态调制等几类光纤传感器的物理原理、基本特性及其应用概况. 相似文献
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建立一种光纤化学传感同步测定吸收光谱和荧光光谱的新方法。自制同步吸收-荧光比色皿,结合光纤化学传感技术,建立同步吸收-荧光光谱法检测仪器,分别测定罗丹明B,维生素B2,维生素B6等溶液的同步吸收-荧光光谱,且与传统的紫外-可见吸光光度法和荧光法进行对比。同步吸收-荧光光谱法测得罗丹明B,维生素B2,维生素B6与传统吸光光度法和荧光光谱法检测的吸收光谱图和荧光光谱的图谱大体一致。最大荧光强度波长与传统的荧光方法比较准确度高,但最大吸收波长略有偏差。同步吸收-荧光光谱法等同于同步测定荧光物质的吸收光谱和荧光光谱,实现二光谱合二为一,测定最大发射波长时准确度高,但最大吸收波长略有偏差,值得深一步研究。 相似文献
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光纤传感技术对工业发展的促进作用 总被引:4,自引:0,他引:4
光纤通信和光纤传感是光纤技术两大应用领域.光纤传感由于具有良好的抗电磁干扰、高电磁绝缘性、本质安全和可成网等诸多优点,因而对仪表工业的发展有很大促进作用,其中包括改造传统产品,更新换代老产品,以及形成新的技术分支.文章对此进行了分析和介绍,并论述了光纤传感研究的新领域。 相似文献
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一种双参量偏振调制光纤传感器 总被引:4,自引:3,他引:1
提出了一种双参量偏振调制光纤传感器结构。在理论上分析了从一个敏感晶体上分离出两种信息的可能性 :通过合理安排传感头中各部件 ,使得传感器同时输出反映两种信息的两路信号。在实验上获得了理论所预期的结果 :只使用一个传感头就可以同时测量电压与温度、力与温度。实验室条件下 ,温度传感的精度为± 1℃。在工作温度 2 0~ 110℃范围内 ,电压传感的温度稳定性在 0~ 10kV量程内为± 0 .5 % ;而力传感的温度稳定性在 0~80N量程内可达± 0 .1%。 相似文献
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《Fiber and Integrated Optics》2007,26(6):335-342
A fiber-optic chemical sensor (FOCS) for detection of nitrogen dioxide (NO2) molecules is reported. The FOCS presents an optropode structure because of the transmission properties of the sensitive material. The NO2 FOCS is activated by using the semiconductor polymer: regioregular head-to-tail poly(3-octylthiophene-2,5-diyl). The operation wavelength of the sensor is 543.5 nm such that a simple LED and detector can be used for the design of this device. The sensor response decreases after each exposure, demonstrating the reduction in sensitivity as well as irreversibility lower than 5%. However, its properties such as rapid response, high selectivity, high sensitivity (0.43 ± 0.01 muW/ppm), hygroscopic properties, and its operation at room temperature make this kind of FOCS a good alternative for NO2 toxic gas detection. 相似文献
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The new enhancement in the determination of pH using optical fiber system is described here. This work uses the membrane made of cellulose acetate membrane for reagent immobilization and congo red (pK a 3.7) and neutral red (pK a 7.2) as pH indicators. An effective covalent chemical binding procedure is used to immobilize the indicators. The response time, reversibility, linear range, reproducibility, and long-term stability of fiber optic sensor with congo red as well as neutral red have been determined. The linear range measured for the sensor based on the congo red and neutral red is 4.2–6.3 and 4.1–9.0, respectively. The response time of sensor membrane is measured by varying the substance pH values between 11.0 and 2.0. 相似文献
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Abstract A fiber-optic chemical sensor (FOCS) for detection of nitrogen dioxide (NO 2 ) molecules is reported. The FOCS presents an optropode structure because of the transmission properties of the sensitive material. The NO 2 FOCS is activated by using the semiconductor polymer: regioregular head-to-tail poly(3-octylthiophene-2,5-diyl). The operation wavelength of the sensor is 543.5 nm such that a simple LED and detector can be used for the design of this device. The sensor response decreases after each exposure, demonstrating the reduction in sensitivity as well as irreversibility lower than 5%. However, its properties such as rapid response, high selectivity, high sensitivity (0.43 ± 0.01 muW/ppm), hygroscopic properties, and its operation at room temperature make this kind of FOCS a good alternative for NO 2 toxic gas detection. 相似文献
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The new enhancement in the determination of pH using optical fiber system is described here. This work uses the membrane made of cellulose acetate membrane for reagent immobilization and congo red (pKa 3.7) and neutral red (pKa 7.2) as pH indicators. An effective covalent chemical binding procedure is used to immobilize the indicators. The response time, reversibility, linear range, reproducibility, and long-term stability of fiber optic sensor with congo red as well as neutral red have been determined. The linear range measured for the sensor based on the congo red and neutral red is 4.2-6.3 and 4.1-9.0, respectively. The response time of sensor membrane is measured by varying the substance pH values between 11.0 and 2.0. 相似文献
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Bongsoo Lee Kyoung Won Jang Dong Hyun Cho Wook Jae Yoo Hyung Shik Kim Soon-Cheol Chung Jeong Han Yi 《Optical Review》2007,14(5):351-354
The purpose of this study was to develop a method for measuring the one-dimensional dose distribution of a high-energy photon
beam using a miniaturized high-resolution fiber-optic radiation sensor array. The measurements were made by thin plastic optical
fibers with organic scintillating fiber sensor probes that emit the visible wavelength of light. The scintillating light is
guided to a silicon photodiode array by plastic optical fibers in order to convert light output to an electrical signal. The
one-dimensional spatial dependence of photon beam is measured by a one-dimensional fiberoptic sensor array in a poly(methyl
methacrylate) (PMMA) phantom. It is shown that this fiber-optic radiation sensor has better spatial resolution than a conventional
ionization chamber and much less time is required to measure one-dimensional dose distribution in the high radiation fields.
The real-time and the high spatial resolution measurements due to the small detector volume make this system suitable for
dosimetry in radiation therapy. 相似文献
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干涉型光纤传感器及阵列的分集检测消偏振衰落技术的研究 总被引:4,自引:0,他引:4
对干涉型光纤传感器的分集检测消偏振衰落技术进行了新的理论分析,提出了将各种信号平方后相加的信号处理方式,使之能实现单元及阵列的实时消偏振衰落信号检测。计算了这一信号处理方式可能引起的幅度最大波动,并得出三路检测偏是分集检测的一个合适取值的结论。根据理论分析,在马赫-陈德尔干涉仪上进行实验研究取得了较好结果,并设计了用于阵列的分集检测实现方式。 相似文献