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Spectro-ellipsometric studies of activated sol–gel thin films to detect Cu2+ ions in aqueous solutions
- Source :
-
Journal of Physics & Chemistry of Solids . Aug2006, Vol. 67 Issue 8, p1775-1780. 6p. - Publication Year :
- 2006
-
Abstract
- Abstract: Thickness, refractive index n and extinction coefficient k of eriochrome cyanine R (ECR) dye doped mesostructured silica film (ECRMSSF) dip-coated on silicon wafers without prior removal of surfactant have been determined in the visible range of the spectrum by spectroscopic-ellipsometry (SE). ECRMSSF was used as sensing detection layer of Cu2+ in aqueous solutions of known pH. The dependence of optical parameters on the pH range of the aqueous phase (pH=6–8) was investigated. The detection reversibility of ECRMSSF was demonstrated. An electron paramagnetic resonance spectrum demonstrated the complexation of Cu2+ by the entrapped ECR. [Copyright &y& Elsevier]
- Subjects :
- *THIN films
*COLLOIDS
*SOLID state electronics
*THICK films
Subjects
Details
- Language :
- English
- ISSN :
- 00223697
- Volume :
- 67
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Journal of Physics & Chemistry of Solids
- Publication Type :
- Academic Journal
- Accession number :
- 21742918
- Full Text :
- https://doi.org/10.1016/j.jpcs.2006.03.016