Optical properties of nanostructured ruthenium dioxide thin films via sol–gel approach
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- 作者：Farid El-Tantawy ; Ahmed A. Al-Ghamdi…
- 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：28
- 期：1
- 页码：52-59
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
- 出版者：Springer US
- ISSN：1573-482X
- 卷排序：28
文摘
High purity ruthenium dioxide (RuO2) nanoparticles with the average size is about 9 nm in diameter are readily synthesized through a low cost sol–gel method. RuO2 thin films have been deposited on SiO2 substrates by sol–gel spin coating techniques at room temperature, followed by annealing at 500 °C for 2 h. The result of X-ray diffraction indicates that the RuO2 nanoparticles are well crystallized with a rutile tetragonal structure. Morphological of RuO2 films were characterized using atomic force microscopy (AFM), transmission electron microscopy and high resolution transmission electron microscopy. The AFM images confirmed a spherical-shape nanoparticles with diameter of 9 nm and surface roughness of 12 nm of the films. The optical absorption studies showed the presence of direct band transition with band gap equal to 1.87 eV. Refractive index and dielectric properties of the films were estimated from optical measurements. Room temperature photoluminescence of RuO2 film showed an emission band at 432 nm.