Highly sensitive optical fiber oxygen sensor using Pt(II) complex embedded in sol-gel matrices
Highly sensitive optical fiber oxygen sensor using Pt(II) complex embedded in sol-gel matrices
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DOI：
10.1016/j.snb.2006.01.051
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发表时间：
2006-12
影响因子：
8.4
通讯作者：
T. Yeh;Cheng-Shane Chu;Y. Lo
中科院分区：
文献类型：
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作者：
T. Yeh;Cheng-Shane Chu;Y. Lo
介绍了一种简单、低成本的光纤氧传感器的制作方法。该技术基于用溶胶-凝胶工艺制备的微孔膜涂覆光纤的端部。铂络合物，四五氟苯基卟啉铂（PtTFPP）或八乙基卟啉铂（PtOEP）被捕获在微孔膜中。在这种传感器配置中，复合物由380 nm辐射激发并由光纤引导。结果表明，PtTFPP和PtOEP掺杂的正辛基三乙氧基硅烷（Octyl-triEOS）/正硅酸乙酯（TEOS）复合干凝胶的I 0/I100值分别为22.31和47.84。此外，典型的Stern-Volmer图显示出非常好的线性。PtTFPP掺杂的Octyl-triEOS/TEOS复合干凝胶的响应时间为0.6s，从氮气到氧气的转换，从氧气到氮气的转换为5s。此外，PtOEP掺杂的Octyl-triEOS/TEOS复合干凝胶的响应时间为0.7s（从氮气到氧气）和14 s（从氧气到氮气）。这些结果表明，基于铂配合物的光纤氧传感器具有更高的灵敏度，稳定性和更快的响应时间相比，现有的。
A simple, low-cost technique for fabrication of an optical fiber oxygen sensor is described. The technique is based on coating the end of an optical fiber with a microporous film prepared by a sol–gel process. A platinum complex, platinum tetrakis pentrafluoropheny porphine (PtTFPP) or platinum octaethylporphine (PtOEP), is trapped in the microporous film. In this sensor configuration, the complex is excited by the 380nm radiation and guided by an optical fiber. As a result, the I0/I100values of the PtTFPP or PtOEP doped in n-Octyltriethoxysilane (Octyl-triEOS)/tetraethylorthosilane (TEOS) composite xerogels are estimated to be 22.31 and 47.84, respectively. Also, the typical Stern–Volmer plot shows a very good linearity. The response time of the PtTFPP doped in Octyl-triEOS/TEOS composite xerogels is 0.6s upon switching from nitrogen to oxygen and 5s from oxygen to nitrogen. In addition, the response time of the PtOEP doped in Octyl-triEOS/TEOS composite xerogels is 0.7s upon switching from nitrogen to oxygen and 14s from oxygen to nitrogen. These results indicate that the optical fiber oxygen sensors based on the platinum complexes exhibit greater sensitivity, stability and faster response time as compared to the existing ones.