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| Abstract: | Magnetic nanocomposites containing iron oxide particles embedded in a polymer matrix have been synthesized using the method of ion exchange. They have been characterized by using low temperature and room temperature magnetic measurements and Mo¨ ssbauer spectroscopy. The iron content in these samples has also been determined. The results have been analysed and explained. The physical and chemical properties of these nanocomposite materials are different from those of the bulk. Some of the unique properties of these materials find application in information storage, color imaging, ferrofluids and magnetic refrigeration |
| Description: | JOURNAL OF MATERIALS SCIENCE 36 (2001) 821– 824 |
| URI: | http://dyuthi.cusat.ac.in/purl/4367 |
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| Effect of cycli ... ic nanocomposite based.pdf | (57.94Kb) |
| Abstract: | A fibre optic technique for detecting trace amounts of nitrite compounds in water is described. The off-line fibre optic sensor outlined here is based on evanescent field absorption in a test solution formed by the reaction of nitrite compounds in water with suitable chemical reagents. A short unclad portion of a plastic clad silica fibre acts as the sensing region. The experimental results clearly establish the usefulness of the present technique for detecting very low concentrations of the order of 1 ppb (parts per billion) of nitrite compounds with a large dynamic range of 1–1000 ppb. Such a high sensitivity enables the present device to be used for measuring the nitrite content in drinking water. |
| URI: | http://dyuthi.cusat.ac.in/purl/1770 |
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| A fibre optic e ... race nitrites in water.pdf | (89.12Kb) |
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