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<strong>On the wettability and optical properties of nanocrystalline CeO2 thin films</strong>

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Title Statement <strong>On the wettability and optical properties of nanocrystalline CeO2 thin films</strong>
 
Added Entry - Uncontrolled Name Srivatsa, KMK ; CSIR-National Physical Laboratory
DST, India
 
Uncontrolled Index Term CeO2 thin films, Nanocrystalline, E-beam evaporation, wettability, Optical properties
 
Summary, etc. Cerium oxide (CeO<sub>2</sub>) is an inexpensive material and has many applications due to its excellent wetting and optical properties.<strong> </strong>However, deposition of CeO<sub>2</sub> thin films of desired wettability (hydrophobic/hydrophilic) and with high refractive index (<em>n</em>) and large band gap (<em>E<sub>g</sub></em>) is a challenging task. In the present study, wettability and optical properties of E-beam evaporated CeO<sub>2 </sub>thin<sub> </sub>films have been reported in the substrate temperature range RT-700 °C. All the evaporated CeO<sub>2</sub> thin films showed only hydrophobic nature, as revealed by contact angle measurements. Further, the maximum values of <em>n</em> (2.38) and <em>E<sub>g</sub></em> (3.21 eV) of CeO<sub>2</sub> thin film are obtained at 700 °C as determined by spectroscopic ellipsometer. Our earlier reported results of sputtered CeO<sub>2</sub> thin films show that it is possible to achieve both hydrophilic and hydrophobic nature and also high <em>n</em> (2.62) and large <em>E<sub>g</sub></em> (3.43 eV) values simply by varying the substrate temperature and this phenomenon has been attributed to the occurrence of energetic ion bombardment of depositing films. These results indicate that the wettable and optical properties of CeO<sub>2</sub> thin films depend on the deposition technique and the associated process parameters.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2016-06-22 09:57:45
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/11753
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 54, ##issue.no## 6 (2016): Indian Journal of Pure & Applied Physics
 
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