Creation of Gold Nanoparticles in ZnO by Ion Implantation–DFT and Experimental Studies
| Autor: | A. Jagerová, Shavkat Akhmadaliev, Martin Veselý, Karla Jeníčková, Jakub Cajzl, Anna Macková, Romana Mikšová, Alena Michalcová, Pavla Nekvindova, Petr Malinský |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Photoluminescence
Materials science General Chemical Engineering 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences DFT Article Ion lcsh:Chemistry symbols.namesake luminescence General Materials Science ion implantation High-resolution transmission electron microscopy RBS Wurtzite crystal structure gold 021001 nanoscience & nanotechnology 0104 chemical sciences Crystallography Ion implantation lcsh:QD1-999 Colloidal gold symbols ZnO nanoparticles 0210 nano-technology Raman spectroscopy |
| Zdroj: | Nanomaterials, Vol 10, Iss 2392, p 2392 (2020) Nanomaterials 10(2020), 2392 Nanomaterials Volume 10 Issue 12 |
| ISSN: | 2079-4991 |
| Popis: | Three different crystallographic orientations of the wurtzite ZnO structure (labeled as c-plane, a-plane and m-plane) were implanted with Au+ ions using various energies and fluences to form gold nanoparticles (GNPs). The ion implantation process was followed by annealing at 600 ° C in an oxygen atmosphere to decrease the number of unwanted defects and improve luminescence properties. With regard to our previous publications, the paper provides a summary of theoretical and experimental results, i.e., both DFT and FLUX simulations, as well as experimental results from TEM, HRTEM, RBS, RBS/C, Raman spectroscopy and photoluminescence. From the results, it follows that in the ZnO structure, implanted gold atoms are located in random interstitial positions &mdash experimentally, the amount of interstitial gold atoms increased with increasing ion implantation fluence. During ion implantation and subsequent annealing, the metal clusters and nanoparticles with sizes from 2 to 20 nm were formed. The crystal structure of the resulting gold was not cubic (confirmed by diffraction patterns), but it had a hexagonal close-packed (hcp) arrangement. The ion implantation of gold leads to the creation of Zn and O interstitial defects and extended defects with distinct character in various crystallographic cuts of ZnO, where significant O-sublattice disordering occurred in m-plane ZnO. |
| Databáze: | OpenAIRE |
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