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Details van artikel 58 van 65 gevonden artikelen
| Titel: |
THE DYNAMIC OF COLLOIDAL CdS INVESTIGATED BY SPECTRAL METHODS |
| Auteur: |
Tatiana Oncescu Lucia Meahcov |
| Verschenen in: |
Analele Universitatii Bucuresti. Chimie |
| Paginering: | Jaargang XV (2006) nr. II pagina's 59-65 |
| Jaar: |
2006 |
| Inhoud: |
Prepared CdS particles have been characterized by their absorption and emission spectra. The band gap value Eg obtained from the absorption spectra permitted us to calculate a particle size of 75+/-5 Å. The fluorescence quenching of CdS with methylviologen led to a particle size of 70+/-5 Å in good agreement with the absorption measurements. In the absorption spectrum the band gap shifted toward the longer wavelengths with the particle size increasing put into evidence by a moderate aged colloid. The shifting of the fluorescence peaks toward the longer wavelength in the red spectral region, with the exciting wavelength shows a polydisperese CdS. These conclusions are in good agreement with the results obtained from temperature jump experiments, which put into evidence the dissociation as well as the aggregation processes of CdS particles |
| Uitgever: |
Ars Docendi Publishing House (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 58 van 65 gevonden artikelen
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