Dual sensing of oxygen and temperature using quantum dots and a ruthenium complex
Dual sensing of oxygen and temperature using quantum dots and a ruthenium complex
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DOI：
10.1016/j.aca.2007.11.008
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发表时间：
2008-01-14
影响因子：
6.2
通讯作者：
Farahi, F.
中科院分区：
文献类型：
--
作者：
Jorge, P. A. S.;Maule, C.;Farahi, F.
提出了一种利用量子点和钌配合物同时测定氧和温度的方案。发光配合物[Ru(II)-三（4,7-二苯基-1,10-菲罗啉）]（2+）固定在非水解的溶胶-凝胶基质中，用作氧传感器。温度信息是由固定在同一材料中的核壳CdSe-ZnS半导体纳米晶体的发光发射提供的。氧和温度的测量误差分别为+/- 2%的氧浓度和+/- 1℃。此外，研究表明，当氧和温度同时淬灭染料的发光强度时，纳米晶体的发光发射只对温度有响应。结果表明，组合发光响应允许使用单个光纤系统同时评估两个参数。结果表明，由于样品温度变化引起的10%的氧浓度误差可以通过纳米晶体温度信息和校正函数来补偿。(C) 2007 Elsevier B.V.版权所有
A scheme for the simultaneous determination of oxygen and temperature using quantum dots and a ruthenium complex is demonstrated. The luminescent complex [Ru(II)-tris(4,7-diphenyl-1,10-phenanthroline)](2+) is immobilized in a non-hydrolytic sol-gel matrix and used as the oxygen sensor. The temperature information is provided by the luminescent emission of core-shell CdSe-ZnS semiconductor nanocrystals immobilized in the same material. Measurements of oxygen and temperature could be performed with associated errors of +/- 2% of oxygen concentration and +/- 1 degrees C, respectively In addition, it is shown that while the dye luminescence intensity is quenched both by oxygen and temperature, the nanocrystals luminescent emission responds only to temperature. Results presented demonstrate that the combined luminescence response allows the simultaneous assessment of both parameters using a single optical fiber system. In particular, it was shown that a 10% error in the measured oxygen concentration, induced by a change in the sample temperature, could be compensated using the nanocrystals temperature information and a correction function. (C) 2007 Elsevier B.V. All rights reserved.