Jayeoba, B. O. and Olowofila, I. O. (2019) Successive Ionic Layer and Absorption Reaction (SILAR): A synthesis technique of optimising the properties of zinc oxide/silver (Zno-Ag) nanocomposite thin films. In: Proceedings of the 4th National Development conference of the School Pure and Applied Sciences, 2nd and 5th December, 2019., The Federal Polytechnic, Ilaro.
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Abstract
The efficiency of ZnO thin film can be enhanced for several applications by incorporating plasmonic silver nanoparticles through successive ionic layer adsorption reaction (SILAR) to form nanocomposite materials. This study uses Sol-gel method to synthesise ZnO and uses SILAR technique to fabricate ZnO-Ag composite material by varying the SILAR (cycles: 0, 2, 3, 4). The optical and morphological properties were characterised by surface profilometry, Scanning Electron Microscope, UV-vis spectrophotometer. The SEM micrograph shows that the film homogeneity and smoothness increases with increase in SILAR cycles of silver nanoparticles as structural defect or possible impurities in reaction components tend to disappear at higher SILAR cycle by successive accumulation of silver nanoparticles due to improved film morphology. The film thicknesses were found to linearly increase with SILAR cycle, and logarithmic decrease of the absorbance over wavelength 350-900nm and decrease in energy gap from 3.22eV for ZnO to 2.49eV for ZnO-Ag with 4 SILAR cycles were observed, these are results of successive deposition of the particles on the substrate and presence of p-type conductivity in the silver-doped ZnO nanoparticles which is responsible for the dominance of silver in samples property dictation. This study opens way to SILAR technique as a notable way of tuning the properties of nanocomposite materials.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Chemistry |
| Depositing User: | Mr Taiwo Egbeyemi |
| Date Deposited: | 31 May 2020 18:48 |
| Last Modified: | 31 May 2020 18:48 |
| URI: | http://eprints.federalpolyilaro.edu.ng/id/eprint/304 |
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