Spherical aluminum oxide nanoparticle synthesis and monolayer film assembly

Abdul Hoque; Ahamed Ullah; Prerna Joshi; Beth S. Guiton; Noe T. Alvarez

doi:10.1007/s10853-023-08428-0

Spherical aluminum oxide nanoparticle synthesis and monolayer film assembly

Abdul Hoque, Ahamed Ullah, Prerna Joshi, Beth S. Guiton, Noe T. Alvarez

Research output: Contribution to journal › Article › peer-review

Abstract

Aluminum oxide is an important ceramic material for coatings and catalyst support for high-temperature applications. In this work, spherical aluminum oxide (AlO_x) nanoparticles (NPs) are synthesized via the thermal decomposition of aluminum oleate using oleic acid as a stabilizing agent. X-ray diffraction analysis confirms its crystallization to γ-Al₂O₃ and α-Al₂O₃ after annealing at 700 and 1100 °C, respectively, revealing their gradual phase transition. Morphological and crystallinity changes of spherical nanoparticles upon annealing were investigated by transmission electron microscopy. The chemical composition and phase transitions to Al₂O₃ NPs were supported by X-ray photoelectron spectroscopy as a function of temperature. Monolayer assembly of as-synthesized NPs onto quartz substrate was performed using organic linker molecules (11-phosphonoundecanoic acid), which was confirmed by atomic force microscopy imaging. The optical band gap of the monolayer assembly was evaluated after annealing at different temperatures along with transmittance properties to compare with the current literature by UV–visible spectroscopy.

Original language	English
Pages (from-to)	7287-7302
Number of pages	16
Journal	Journal of Materials Science
Volume	58
Issue number	17
DOIs	https://doi.org/10.1007/s10853-023-08428-0
State	Published - May 2023

Bibliographical note

Funding Information:
The authors thank Dr. Necati Kaval (University of Cincinnati) for valuable suggestions and instrumental support throughout this project. AU and BSG acknowledge the U.S. Department of Energy under award #DE-SC0022315, and AU acknowledges partial salary support from the University of Kentucly Energy Research Priority Area program.

Funding Information:
The authors thank Dr. Necati Kaval (University of Cincinnati) for valuable suggestions and instrumental support throughout this project. AU and BSG acknowledge the U.S. Department of Energy under award #DE-SC0022315, and AU acknowledges partial salary support from the University of Kentucly Energy Research Priority Area program.

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

ASJC Scopus subject areas

Materials Science (all)
Mechanics of Materials
Mechanical Engineering

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10.1007/s10853-023-08428-0

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abstract = "Aluminum oxide is an important ceramic material for coatings and catalyst support for high-temperature applications. In this work, spherical aluminum oxide (AlOx) nanoparticles (NPs) are synthesized via the thermal decomposition of aluminum oleate using oleic acid as a stabilizing agent. X-ray diffraction analysis confirms its crystallization to γ-Al2O3 and α-Al2O3 after annealing at 700 and 1100 °C, respectively, revealing their gradual phase transition. Morphological and crystallinity changes of spherical nanoparticles upon annealing were investigated by transmission electron microscopy. The chemical composition and phase transitions to Al2O3 NPs were supported by X-ray photoelectron spectroscopy as a function of temperature. Monolayer assembly of as-synthesized NPs onto quartz substrate was performed using organic linker molecules (11-phosphonoundecanoic acid), which was confirmed by atomic force microscopy imaging. The optical band gap of the monolayer assembly was evaluated after annealing at different temperatures along with transmittance properties to compare with the current literature by UV–visible spectroscopy.",

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Spherical aluminum oxide nanoparticle synthesis and monolayer film assembly

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