发明名称 |
Optical sensing elements for nitrogen dioxide (NO2) gas detection, a sol-gel method for making the sensing elements and fiber optic sensors incorporating nitrogen dioxide gas optical sensing elements |
摘要 |
A sensing element, a method of making a sensing element, and a fiber optic sensor incorporating the sensing element are described. The sensor can be used for the quantitative detection of NO<SUB>2 </SUB>in a mixture of gases. The sensing element can be made by incorporating a diazotizing reagent which reacts with nitrous ions to produce a diazo compound and a coupling reagent which couples with the diazo compound to produce an azo dye into a sol and allowing the sol to form an optically transparent gel. The sensing element changes color in the presence of NO<SUB>2 </SUB>gas. The temporal response of the absorption spectrum at various NO<SUB>2 </SUB>concentrations has also been recorded and analyzed. Sensors having different design configurations are described. The sensing element can detect NO<SUB>2 </SUB>gas at levels of parts per billion.
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申请公布号 |
US7239766(B2) |
申请公布日期 |
2007.07.03 |
申请号 |
US20030693519 |
申请日期 |
2003.10.27 |
申请人 |
MISSISSIPPI STATE UNIVERSITY |
发明人 |
MECHERY SHELLY JOHN;SINGH JAGDISH P. |
分类号 |
G02B6/00;C03B19/12;C03C1/00;C03C11/00;G01N21/77;G01N21/78;G01N31/22;G01N33/00;G02B6/06;G02B6/42 |
主分类号 |
G02B6/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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