Concentration dependent optical properties of rhodamine B doped poly(vinyl alcohol) solutions
| Autor: | A. Sharma, J.K. Tripathi, K. Das, Shilpa Tripathi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Vinyl alcohol Materials science Polymers and Plastics Dopant Absorption spectroscopy Band gap General Chemical Engineering Organic Chemistry Doping Analytical chemistry Nanochemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry Rhodamine B 0210 nano-technology |
| Zdroj: | Macromolecular Research. 24:617-622 |
| ISSN: | 2092-7673 1598-5032 |
| DOI: | 10.1007/s13233-016-4087-4 |
| Popis: | The optical properties, namely refractive index (RI) studies, are reported on a series of pure and doped poly(vinyl alcohol) (PVA) in solution form. The PVA solutions were synthesized with 1, 2, 3, 4, and 5 wt% of PVA in distilled water followed by doping with Rhodamine B in concentrations ranging from 0.05 wt% to 2 wt%. The absorption spectra show an observable shift in the band edge position towards higher wavelength with increase in PVA wt%. When the dopant molecules are added, the curves are drastically modified with the occurrence of new peaks arising at higher doping concentrations along with change in the bandgap. These effects are prominent for all the concentration of PVA solution. The RI does not change much for low doping wt%. but when dopant is added in higher concentrations, it increases slightly reaching a maximum of ∼1.35 at 2 wt%. It is observed that host polymer properties dominate at low doping while a combination of host polymer and dopant dye properties dominate at higher doping concentrations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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