The luminescence properties of the mesoporous silica skeleton of different diatoms are employed to achieve sensing of gas at a low concentration level. Sub-ppm detection of adsorbed NO2 with a detection limit of the orderof 50 ppb for Thalassiosira Rotula is demonstrated; this effect is interpreted as the result of a local interaction between gas molecules and surface oxygen vacancies leading to static suppression of light-emission centres.
The gas-detection properties of light-emitting diatoms
SETARO, ANTONIO;
2008-01-01
Abstract
The luminescence properties of the mesoporous silica skeleton of different diatoms are employed to achieve sensing of gas at a low concentration level. Sub-ppm detection of adsorbed NO2 with a detection limit of the orderof 50 ppb for Thalassiosira Rotula is demonstrated; this effect is interpreted as the result of a local interaction between gas molecules and surface oxygen vacancies leading to static suppression of light-emission centres.File in questo prodotto:
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