Periodical
Formation of Transparent Nanoporous Titanium Oxide Films on Glass Substrates Using an Anodization Process
| العنوان: | Formation of Transparent Nanoporous Titanium Oxide Films on Glass Substrates Using an Anodization Process |
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| المؤلفون: | Manea, Elena, Obreja, Cosmin, Purica, Munizer, Dinescu, Adrian, Comanescu, Florin, Schiopu, Vasilica, Budianu, Elena |
| المصدر: | Journal of Nano Research; January 2012, Vol. 16 Issue: 1 p113-118, 6p |
| مستخلص: | We report on an experimental study on transparent nanoporous titanium oxide films on glass substrates using an anodization process. Ti thin films of 50-90 nm have been deposited on glass substrate by dc sputtering (1.8210-3 Pa, 100 W) followed by a thermal treatment of 500°C for 30 min. in order to improve the adhesion to the glass substrate. Then an anodization process was applied in order to obtain TiO2 thin nanoporous layers using a cell consisted of three electrodes and aqueous electrolyte solution of 1% NH4F concentration, monoethyleneglycol and DI water. After anodization the samples were annealed at 450°C for 45 min using nitrogen gas. The layers have a nanoporous structure with pore dimensions in the range of 50-80 nm. FTIR and micro-Raman spectroscopy were used to identify the crystalline phase of the TiO2 layers. Raman scattering spectra clearly identify the anatase phase on the basis of Eg modes at ~ 146 cm-1 of the TiO2. The FTIR spectrum showed only the peak at 614 cm−1 which can be associated with the characteristic vibrational mode of TiO2 anatase. The optical properties of TiO2 thin films have been determined by ellipsometric measurements in the spectral range (0.2-0.8 μm) and a value of 2.41-2.45 was obtain for refractive index at 632 nm. Spectrophotometric measurements showed a transmittance over 70% and an optical band gap of 3.3-3.5 eV was determined. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 16625250 16619897 |
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| DOI: | 10.4028/www.scientific.net/JNanoR.16.113 |