| An optical fibre pH sensor based on dye doped mesostructured silica |
| Othman Belhadj Miled |
| 关键词：Mesostructured silica; Optical fibre pH sensor; Evanescent wave; Dyes doped |
| 主要内容：This paper describes the synthesis and optical pH sensing properties of a pH indicator dye activated mesostructured silica coated optical fibre. The pH-sensitive dye bromothymol blue was incorporated into the mesostructure sol precursor and thin films/coatings were used for pH-sensing applications without prior removal of the surfactant. The pH sensitivity range and operating wavelength were analysed by absorption measurements on layer dip-coated on glass slides. The pH sensing properties of coated optical fibre were tested by evanescent wave method. Experiments were carried out by using a series of solutions of known pH. No leaching was observed (except at very high pH) and an excellent reversibility was obtained between pH =2 and 5... |
| 《2004 Elsevier》 |
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