In-situ fluorescence imaging of sol-gel thin film deposition
| Autor: | A. J. Hurd, Fumito Nishida, Bruce Dunn, C. J. Brinker, John McKiernan, J. I. Zink |
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| Rok vydání: | 1994 |
| Předmět: |
Materials science
Layer by layer Analytical chemistry General Chemistry engineering.material Condensed Matter Physics Dip-coating Evaporation (deposition) Electronic Optical and Magnetic Materials Biomaterials Pyranine chemistry.chemical_compound chemistry Coating Materials Chemistry Ceramics and Composites engineering Thin film Luminescence Sol-gel |
| Zdroj: | Journal of Sol-Gel Science and Technology. 2:477-481 |
| ISSN: | 1573-4846 0928-0707 |
| Popis: | Pyranine was used as a fluorescence probe to monitor the chemical evolution in-situ during thin film deposition by the dip coating process. The sensitivity of the pyranine luminescence to protonation/deprotonation effects was used to quantify changes in the water/alcohol ratio in real time within the depositing film as the substrate was withdrawn from the coating reservoir. The spatially resolved spectral results clearly showed that preferential evaporation of alcohol occurred with increasing distance from the reservoir and that the maximum water content reached rather high values near the drying line. Correlation of the luminescence results with the interference pattern of the drawn films allows the solvent composition in the film to be mapped as a function of film thickness. These experiments demonstrate for the first time that luminescent organic molecules may be applied to the processing science of sol-gel thin film deposition. |
| Databáze: | OpenAIRE |
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