Nanostructures in various Au ion-implanted ZnO facets modified using energetic O ions

0536509 - ÚJF 2021 RIV GB eng J - Článek v odborném periodiku
Macková, Anna - Jagerová, Adéla - Malinský, Petr - Cutroneo, Mariapompea - Flaks, Josef - Nekvindová, P. - Michalcová, A. - Holý, V. - Košutová, T.
Nanostructures in various Au ion-implanted ZnO facets modified using energetic O ions.
Physical Chemistry Chemical Physics. Roč. 22, č. 41 (2020), s. 23563-23573. ISSN 1463-9076. E-ISSN 1463-9084
Grant CEP: GA MŠMT EF16_013/0001812; GA MŠMT LM2015056; GA ČR GA18-03346S
Institucionální podpora: RVO:61389005
Klíčová slova: ion-implantation * RBS-C * Raman spectroscopy
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 3.676, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1039/D0CP04119J

Noble metal nanoparticles dispersed in semiconductors, mainly in ZnO, have been intensively investigated. Au dispersion and possible precipitation as well as damage growth were studied in ZnO of various orientations, a-plane (1120) and c-plane (0001), using 1 MeV Au+-ion implantation with an ion fluence of 1.5 x 10(16) cm(-2) and subsequently annealed at 600 degrees C in an ambient atmosphere for one hour. Afterwards, irradiation with 10 MeV O3+ at a fluence of 5 x 10(14) cm(-2) was used to modify Au distribution and internal morphology as well as to follow the structural modification of ZnO under high-energy light-ion irradiation. Rutherford backscattering spectrometry in the channelling mode (RBS-C) and Raman spectroscopy show that O irradiation with high electronic energy transfer distinctly modifies the implanted Au layer in various ZnO facets. It introduces additional displacement and disorder in the O sublattice mainly in the a-plane while not creating an additional strain in this facet. This has been confirmed by XRD analysis, identifying the appearance of an additional phase (nanocrystallites) after Au implantation, which diminishes after O irradiation, and RBS-C has identified decreased disorder in the Zn-sublattice. Unlike in c-plane ZnO, it has been possible to observe a local compressive deformation around spherical defects, which is more pronounced after O irradiation simultaneously with the vertical strain introduced in the Au-implanted and annealed layer. Transmission electron microscopy (TEM) with energy dispersive spectroscopy (EDS) was employed to investigate the interior morphology, showing the occurrence of Au-hcp clusters of the small sizes of about 4-10 nm, neither the cluster sizes nor their shapes are significantly affected by the O irradiation.
Trvalý link: http://hdl.handle.net/11104/0314285