| Autor: |
F Medjaldi, A Bouabellou, Y Bouachiba, A Taabouche, K Bouatia, H Serrar |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Materials Research Express, Vol 7, Iss 1, p 016439 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2053-1591 |
| DOI: |
10.1088/2053-1591/ab6c0c |
| Popis: |
In this research TiO _2 , SnO _2 and TiO _2 :SnO _2 nanocomposite thin films were fabricated by the sol–gel dip coating technique. The mixture was prepared by varying the molar ratio of SnO _2 to TiO _2 , i.e. TiO _2 :SnO _2 (9:1), TiO _2 :SnO _2 (8:2) and TiO _2 :SnO _2 (6:4)). The obtained samples were characterized by means of the Raman microscopy, Scanning Electron Microscopy (SEM), UV–Vis spectrophotometry and m-lines spectroscopy (Prism coupler). Raman analysis shows that pure TiO _2 and SnO _2 thin films are characterized by the vibrational modes of anatase and rutile cassiterite, respectively. Furthermore, the Raman spectra of the TiO _2 :SnO _2 nanocomposites show the presence of a mixture of anatase and rutile TiO _2 phases. The SEM images reveal that the morphology is clearly modified with SnO _2 content. The ripples in the transmittance spectra decreased with increasing SnO _2 content. Also, the evolution of the optical band gap seems to be consistent with the Raman analysis. A great attention has been paid to the refractive index measurements by the prism coupler technique. In this way, variable–refractive index systems have been successfully obtained using TiO _2 :SnO _2 nanocomposite thin films. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
