Portable, Low-Cost, Solid-State Luminescence-Based O2 Sensor
Portable, Low-Cost, Solid-State Luminescence-Based O2 Sensor
复制标题
便携式、低成本、固态发光氧气传感器
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
F. Bright
中科院分区：
文献类型：
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作者：
A. Watkins;B. Wenner;J. Jordan;Wenying Xu;J. Demas;F. Bright
提出了一种完全基于固态电子学的分子氧定量传感器。该传感器基于分子O2对三(4，7-二苯基-1，10-菲咯啉)Ru(II)([Ru(DPP)3]2+)的荧光猝灭。该传感器包括将Ru络合物固定在多孔溶胶-凝胶处理的玻璃薄膜中，并将该薄膜直接浇铸到蓝色量子阱发光二极管(LED)的表面上。Ru(DPP)络合物由LED激发，[Ru(DPP)3]2+发射用低成本的丙烯酸滤色器滤除，发射用廉价的硅光电二极管检测。给出了传感器对水中溶解O2和气态O2的响应。该传感器具有较快的响应时间和良好的可逆性，对气相(线性斯特恩-沃布纳分析和多点斯特恩-沃尔默分析)和水相中O2的检出限分别为0.5%、0.02%和110 ppb。该传感器为传统的基于电化学的氧气传感提供了一种经济高效的替代方案，也为其他基于光学的传感器提供了一个平台。
A novel sensor for quantifying molecular O2 based entirely on solid-state electronics is presented. The sensor is based on the luminescence quenching of tris(4,7-diphenyl-1, 10-phenanthroline)ruthenium(II) ([Ru(dpp)3]2+) by molecular O2. The sensor involves immobilizing the ruthenium complex within a porous sol-gel-processed glass film and casting this film directly onto the surface of a blue quantum-well light-emitting diode (LED). The ruthenium complex is excited by the LED, the [Ru(dpp)3]2+ emission is filtered from the excitation with a low-cost acrylic color filter, and the emission is detected with an inexpensive silicon photodiode. The sensor response to gaseous O2 and dissolved O2 in water is presented. The sensor exhibits fast response times and good reversibility, and detection limits are 0.5%, 0.02%, and 110 ppb, respectively, for O2 in the gaseous (linear Stern–Vobner and multi-site Stern–Volmer analysis) and aqueous phase. This sensor provides a cost-effective alternative to traditional electrochemical-based O2 sensing and also provides a platform for other optically based sensors.