Atomic layer deposition of zinc oxide on mesoporous zirconia using zinc(II) acetylacetonate and air

01 September 2023, Version 3


The self-terminating chemistry of atomic layer deposition (ALD) ideally enables the growth of homogeneously distributed materials on an atomic scale. This study investigates the ALD of zinc oxide (ZnO) on mesoporous zirconium oxide (ZrO2) using zinc acetylacetonate [Zn(acac)2] and synthetic air in a fixed-bed powder ALD reactor. A broad variety of methods, including thermogravimetry analysis, scanning electron microscopy with energy dispersive X-ray spectroscopy, low energy ion scattering, X-ray absorption near edge structure, X-ray photoelectron spectroscopy, in situ diffuse reflectance infrared Fourier transform spectroscopy-mass spectrometry, and density functional theory calculations were used to analyze the reactant and the resulting samples. The factors affecting the zinc loading (wt%) on ZrO2 were investigated by varying the ALD reaction temperature (160 °C–240 °C), the calcination temperature of zirconium oxide (400 °C–1000 °C) and the ALD cycle number (up to three). The studied process showed self-terminating behavior, with the areal number density of zinc of approximately two atoms per square nanometer per cycle. Zinc was distributed throughout ZrO2. After the Zn(acac)2 reaction, acac ligands were removed using synthetic air at 500 °C. In the following cycles, the already-deposited ZnO acted as nuclei for further ZnO growth. This study demonstrates the potential of Zn(acac)2 as an ALD reactant and provides an initial understanding of ZnO growth via ALD on high surface area porous particles as an example for catalytic applications.


Powder ALD
Catalyst preparation
Atomic Layer Deposition


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.