Dual optical sensor for oxygen and temperature based on the combination of time domain and frequency domain techniques.
Dual optical sensor for oxygen and temperature based on the combination of time domain and frequency domain techniques.
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DOI：
10.1016/j.talanta.2010.12.016
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发表时间：
2011-03-15
期刊：
影响因子：
6.1
通讯作者：
Tolosa, Leah
中科院分区：
文献类型：
--
作者：
Lam, Hung;Rao, Govind;Loureiro, Joana;Tolosa, Leah
在测量真实的世界中的特定条件时，存在必须同时确定氧气浓度和温度两者的许多情况。在这里，我们描述了一种用于氧气和温度的双光学传感器，可以适用于不同的应用。该传感器的测量原理是基于氧敏钌络合物三-4，7-二苯基-1，10-菲咯啉钌（III）[Rudpp]和温敏铕络合物三（二苯甲酰甲烷）单（5-氨基-1，10-菲咯啉）铕（III）[Eudatp]的发光衰减时间。两个发光体的激发和发射光谱显著重叠，并且不能以使用带通滤波器或其他光学部件的常规方式区分。然而，通过应用频域和时域技术，我们可以从复合物的各个衰减时间中分离信号。铕络合物被截留在聚-（甲基丙烯酸甲酯）（PMMA）层和钌络合物被物理吸附在硅胶上，并纳入一个有机硅层。这两层通过双面硅基胶带彼此附接。铕敏感膜在10至70ºC之间具有温度敏感性，钌氧敏感层可以可靠地测量0至21%的氧气。
In measuring specific conditions in the real world, there are many situations where both the oxygen concentration and the temperature have to be determined simultaneously. Here we describe a dual optical sensor for oxygen and temperature that can be adapted for different applications. The measurement principle of this sensor is based on the luminescence decay times of the oxygen-sensitive ruthenium complex tris-4,7-diphenyl-1,10-phenanthroline ruthenium(III) [Rudpp] and the temperature-sensitive europium complex tris(dibenzoylmethane) mono(5-amino-1,10-phenanthroline)europium(III) [Eudatp]. The excitation and emission spectra of the two luminophores overlap significantly and cannot be discriminated in the conventional way using band pass filters or other optical components. However, by applying both the frequency and time domain techniques, we can separate the signals from the individual decay time of the complexes. The europium complex is entrapped in a poly-(methyl methacrylate) (PMMA) layer and the ruthenium complex is physically adsorbed on silica gel and incorporated in a silicone layer. The two layers are attached to each other by a double sided silicone based tape. The europium sensing film was found to be temperature-sensitive between 10 and 70ºC and the ruthenium oxygen-sensitive layer can reliably measure between 0 and 21% oxygen.
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