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Journal articles on the topic 'Cerium oxide films'

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Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

Liu, Xiao Zhen, Yu Fan Ni, Xiao Zhou Liu, Le Tian Xia, Jie Chen, and Xiao Yu Zheng. "Effect of Heat Treatment on the Crystal Structure of the Anodic Cerium Oxide Films." Key Engineering Materials 748 (August 2017): 12–16. http://dx.doi.org/10.4028/www.scientific.net/kem.748.12.

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The cerium dioxide films were prepared with cerium foils as raw materials by anodization in Na2C2O4-NH3∙H2O-H2O-(CH2OH)2 electrolyte. The anodic cerium oxide films were heat treated in 100~400°C and 0.5~2.5h, respectively. The heat treated anodic cerium oxide films were characterized with X-ray diffraction (XRD). The heat treated anodic cerium oxide film at 100°C is semi crystalline film. The heat treated anodic cerium oxide film at 200°C, 300°C, 350°C, 400°C, respectively for 2h, is the cerium dioxide film respectively, and has a structure of cubic fluorite respectively. The crystal structures of the cerium dioxide films become more complete with the increase of heat treatment temperature in 200 ~ 400 °C. The heat treated anodic cerium oxide film at 400°C for 0.5h, 1h, 1.5h, 2.5h, respectively, is the cerium dioxide film respectively, and has a structure of cubic fluorite respectively. The crystal structures of the cerium dioxide films become more complete with the increase of heat treatment times in 0.5h ~ 2.5h.

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2

Liu, Xiao Zhen, Wei Ren Rong, Xiao Zhou Liu, Xiao Hui Ren, Jie Chen, and Ying Zhu. "Preparation of Cerium Dioxide Film by Anodization in Na₂C₂O₄-NH₃∙H₂O-H₂O-(CH₂OH)₂ Electrolyte." Key Engineering Materials 748 (August 2017): 7–11. http://dx.doi.org/10.4028/www.scientific.net/kem.748.7.

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The cerium dioxide films were prepared with cerium foils as raw materials by anodization in Na2C2O4-NH3∙H2O-H2O-(CH2OH)2 electrolyte. The anodic cerium oxide film was heat treated at 550°C. The cerium dioxide films were characterized with X-ray diffraction (XRD), energy-dispersive analyses of X-ray (EDAX), Fourier transform infrared (FTIR) techniques and scanning electron microcopy (SEM), respectively. The anodic cerium oxide film is semi crystalline film. The heat treated anodic cerium oxide film at 550°C is the fluorite-structured cerium dioxide film, and the crystal structure of the cerium dioxide film becomes more complete than that of the anodic cerium oxide film. The cerium dioxide film is porous film. The water, ethylene glycol and CO2 are adsorbed in the anodic cerium oxide film. The adsorbing water, ethylene glycol and CO2 in the anodic cerium oxide film are removed at 550°C. The cerium dioxide film has strong absorption in the range of 1400~4000cm-1.

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3

Wang, Adele Qi, and Teresa Diane Golden. "Electrochemical Formation of Cerium Oxide/Layered Silicate Nanocomposite Films." Journal of Nanotechnology 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8459374.

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Cerium oxide/montmorillonite nanocomposite films were synthesized electrochemically from solutions containing 0.5 to 50% Na-montmorillonite. The nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. Nanocomposite films synthesized from montmorillonite concentrations lower than 10% were continuous, uniform, and dense. X-ray diffraction confirmed that the nanocomposite films retain the face-centered cubic structure of cerium oxide while incorporating exfoliated platelets of the montmorillonite into the matrix. In addition, calculations from XRD data showed particle sizes ranging from 4.50 to 6.50 nm for the nanocomposite coatings. Raman and FTIR spectroscopy had peaks present for cerium oxide and the layered silicates in the coatings. Cross-sectional scanning electron microscopy and energy-dispersive X-ray spectroscopy confirmed the presence of montmorillonite throughout the cerium oxide matrix.

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4

Wang, Adele Qi, and Teresa D. Golden. "Electrodeposition of Oriented Cerium Oxide Films." International Journal of Electrochemistry 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/482187.

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Cerium oxide films of preferred orientation are electrodeposited under anodic conditions. A complexing ligand, acetate, was used to stabilize the cerium (III) ion in solution for deposition of the thin films. Fourier transform infrared spectroscopy showed that the ligand and metal tended to bind as a weakly bidentate complex. The crystallite size of the films was in the nanometer range as shown by Raman spectroscopy and was calculated from X-ray diffraction data. Crystallite sizes from 6 to 20 nm were obtained under the anodic deposition conditions. Sintering of the (111) oriented films showed an increase in the (111) orientation with temperatures up to 900°C. Also, the crystallite size increased from 20 nm to 120 nm under sintering conditions. Addition of the deposited films to the substrate improved corrosion resistance for the substrate.

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5

Ortiz, E., L. Martínez-Gómez, J. F. Valdés-Galicia, R. García, M. Anzorena, and L. Martínez de la Escalera. "Skin protection against UV radiation using thin films of cerium oxide." Radioprotection 54, no. 1 (January 2019): 67–70. http://dx.doi.org/10.1051/radiopro/2019002.

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In this work, we evaluated the efficiency of cerium oxide as sunscreen using titanium oxide as standard comparison material. Geant4 software was used to perform numerical simulation, we calculated the radiation dose that ultraviolet radiation deposits in a skin sample as a function of thin film thickness of the sunscreens. We found that in the interval between 5 and 15 nm of the thin film thickness and for wavelengths between 160 and 400 nm, cerium oxide has the potential to reduce the radiation dose more than 10% with respect to the same thickness band of titanium oxide. Using thin films of cerium oxide and titanium oxide with same thicknesses and greater than 45 nm, the difference in the attenuation of the radiation dose for both materials is less than 1%. The results lead us to propose cerium oxide as an alternative material to titanium oxide for the manufacture of sunscreens.

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6

Jing, Feng Juan, Lu Wang, Y. W. Liu, J. Y. Cheng, Yong Xiang Leng, R. K. Y. Fu, X. B. Zhao, Paul K. Chu, and Nan Huang. "Biocompatibility of Cerium Oxide Films Synthesized by Dual Plasma Deposition." Key Engineering Materials 330-332 (February 2007): 749–52. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.749.

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Cerium oxide films have been fabricated using dual plasma deposition. X-ray diffraction. (XRD) reveals a crystalline phase and X-ray photoelectron spectroscopy (XPS) shows that La exists predominantly in the +4 oxidation state. The activated partial thromboplastin time is longer than that of blood plasma and stainless steel. Furthermore, the numbers of adhered, aggregated and morphologically changed platelets are reduced compared to low-temperature isotropic carbon (LTIC). HUVEC cells exhibit good adhesion and proliferation behavior on cerium oxide films. This study suggests rare earth oxide films are potential blood-contacting biomedical materials.

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7

Popescu, Simona, Mihaela Mîndroiu, Daniela Cabuzu, and Cristian Pîrvu. "The Roll of NaPSS Surfactant on the Ceria Nanoparticles Embedding in Polypyrrole Films." Journal of Nanomaterials 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/9747931.

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Cerium oxide nanoparticles (CeO2NPs) in crystalline form have been synthesized by a coprecipitation method. CeO2nanoparticles were then embedded in polypyrrole (PPy) films during the electropolymerization of pyrrole (Py) on titanium substrate. The influence of poly(sodium 4-styrenesulfonate) (NaPSS) surfactant used during polymerization on the embedding of CeO2NPs in polypyrrole films was investigated. The new films were characterized in terms of surface analysis, wettability, electrochemical behaviour, and antibacterial effect. The surface and electrochemical characterization revealed the role of surfactant on PPy doping process cerium oxide incorporation. In the presence of surfactant, CeO2NPs are preferentially embedded in the polymeric film while, without surfactant, the ceria nanoparticles are quasiuniformly spread as agglomerates onto polymeric films. The antibacterial effect of studied PPy films was substantially improved in the presence of cerium oxide and depends by the polymerization conditions.

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8

Gilliss, Shelley R., Jeffrey K. Fairer, N. Ravishankar, Mark G. Schwabel, and C. Barry Carter. "Microanalysis of AFM Tips Coated with Cerium Oxide." Microscopy and Microanalysis 7, S2 (August 2001): 1236–37. http://dx.doi.org/10.1017/s1431927600032256.

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Cerium oxide is widely used for chemomechanical polishing (CMP) of silicate glasses. Uses include finishing of optical elements and planarizing dielectrics in the semiconductor industry. This study is designed to investigate the fundamentals of the cerium oxide/silica CMP process by measuring the interaction force between silicate glasses and cerium oxide. Surface forces involved in the polishing of glass by a cerium oxide abrasive can be studied in a controlled manner by measuring sample-tip interactions between a glass substrate and a cerium oxide tip in an atomic force microscope (AFM). Commercially available AFM tips have been coated with thin, uniform films of cerium oxide. By using a square pyramid tip as a template for the shape of the cerium oxide film, challenges related to irregular or blunt tip shape can be overcome. However, complete characterization of structure, shape and chemical composition is required before useful information can be obtained using the AFM.

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9

Tsud, Nataliya, Sofiia Bercha, Robert G. Acres, Mykhailo Vorokhta, Ivan Khalakhan, Kevin C. Prince, and Vladimír Matolín. "Functionalization of nanostructured cerium oxide films with histidine." Physical Chemistry Chemical Physics 17, no. 4 (2015): 2770–77. http://dx.doi.org/10.1039/c4cp03780d.

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The surfaces of cerium oxide films were modified by histidine adsorption in vacuum. It was shown that the morphology and structure of the oxide are decisive factors which define the adsorption geometry of the histidine adlayer.

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10

Yang, L., X. Pang, G. Fox-Rabinovich, S. Veldhuis, and I. Zhitomirsky. "Electrodeposition of cerium oxide films and composites." Surface and Coatings Technology 206, no. 1 (October 2011): 1–7. http://dx.doi.org/10.1016/j.surfcoat.2011.06.029.

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11

Wang, Adele Qi, and Teresa Diane Golden. "Anodic Electrodeposition of Cerium Oxide Thin Films." Journal of The Electrochemical Society 150, no. 9 (2003): C616. http://dx.doi.org/10.1149/1.1596164.

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12

Golden, Teresa Diane, and Adele Qi Wang. "Anodic Electrodeposition of Cerium Oxide Thin Films." Journal of The Electrochemical Society 150, no. 9 (2003): C621. http://dx.doi.org/10.1149/1.1596165.

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13

Tang, Ling, Maria Salamon, and MarkR De Guire. "Cerium Oxide Thin Films on Solid Oxide Fuel Cell Anodes." Science of Advanced Materials 2, no. 1 (March 1, 2010): 79–89. http://dx.doi.org/10.1166/sam.2010.1059.

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14

Suh, Seigi, Jun Guan, Liliana A. Mîinea, Jean-Sébastien M. Lehn, and David M. Hoffman. "Chemical Vapor Deposition of Cerium Oxide Films from a Cerium Alkoxide Precursor." Chemistry of Materials 16, no. 9 (May 2004): 1667–73. http://dx.doi.org/10.1021/cm035392y.

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15

Suresh, R., V. Ponnuswamy, C. Sankar, M. Manickam, and R. Mariappan. "IDC golf-ball structured thin films: preparation, characterization and photodiode properties." RSC Advances 6, no. 59 (2016): 53967–80. http://dx.doi.org/10.1039/c6ra07716a.

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16

Logothetidis, S., P. Patsalas, and C. Charitidis. "Enhanced catalytic activity of nanostructured cerium oxide films." Materials Science and Engineering: C 23, no. 6-8 (December 2003): 803–6. http://dx.doi.org/10.1016/j.msec.2003.09.081.

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17

Shmyreva, A. N., A. V. Borisov, and N. V. Maksimchuk. "Electronic sensors built on nanostructured cerium oxide films." Nanotechnologies in Russia 5, no. 5-6 (June 2010): 382–89. http://dx.doi.org/10.1134/s1995078010050137.

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18

Liao, Guo Jin, Hong Luo, Shao Feng Yan, and Ming Chen. "The Blue Luminescence of CeCl₃ Doped Aluminum Oxide Thin Film." Advanced Materials Research 299-300 (July 2011): 456–59. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.456.

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Aluminum oxide film doped with Ce3+ has been deposited by the medium frequency reactive magnetron sputtering technique. The photoluminescence emission from these films show peaks at range of 374-405 nm. The relative intensity of these peaks is strongly dependent on the amount of Ce incorporated in the films. The presence of Ce3+ as well as the stoichiometry of these films has been determined by energy dispersive x-ray spectroscope (EDS) measurements. It is proposed that the light emission observed generated by luminescent center associated with cerium chloride molecular rather than to atomic cerium impurities. The reason for a dominance of the lower energy transition as the amount of Ce3+ in the oxide films is increased is that the energy difference of 4f1and 5d1 decreases, with the increase of the Ce3+ concentration. These luminescent films are potentially good candidates for photonics applications.

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19

Esposito, V., D. W. Ni, S. Sanna, F. Gualandris, and N. Pryds. "Releasing cation diffusion in self-limited nanocrystalline defective ceria thin films." RSC Advances 7, no. 23 (2017): 13784–88. http://dx.doi.org/10.1039/c7ra01226h.

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20

Kainbayev, Nursultan, Mantas Sriubas, Darius Virbukas, Zivile Rutkuniene, Kristina Bockute, Saltanat Bolegenova, and Giedrius Laukaitis. "Raman Study of Nanocrystalline-Doped Ceria Oxide Thin Films." Coatings 10, no. 5 (April 28, 2020): 432. http://dx.doi.org/10.3390/coatings10050432.

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Samarium-doped ceria (SDC) and gadolinium-doped ceria (GDC) thin films were formed by e-beam vapor deposition on SiO2 substrate, changing the deposition rate and substrate temperature during the deposition. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-Ray spectrometry (EDS) were employed in order to investigate the structure ad morphology of the films. A single Raman peak describing the structure of undoped CeO2 was observed at a frequency of 466 cm−1. Doping of cerium oxide with rare-earth elements shifted the peak to lower frequencies (for Sm—462 cm−1). This shift occurs due to the increased number of oxygen vacancies in doped cerium oxide and it depends on the size and concentration factor of the dopant. It was found that wavenumbers and their intensity differed for the investigated samples, even though the peaks resembled each other in shape. The indicated bands for doped ceria originated as a result of the Raman regime (F2g) of fluorite dioxide associated with the space group (Fm3m). The observed peak‘s position shifting to a lower frequency range demonstrates the symmetric vibrations of oxygen ions around Ce4+ ions in octahedra CeO8. Raman shift to the lower frequencies for the doped samples has two reasons: an increase in oxygen vacancies caused by doping cerium oxide with rare-earth materials and the size factor, i.e., the change in frequency Δω associated with the change in the lattice constant Δa.

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21

Herzig, C., J. Frank, A. K. Opitz, J. Fleig, and A. Limbeck. "Quantitative analysis of gadolinium doped cerium oxide thin films via online-LASIL-ICP-OES." Journal of Analytical Atomic Spectrometry 34, no. 11 (2019): 2333–39. http://dx.doi.org/10.1039/c9ja00250b.

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22

Mysliveček, Josef, Vladimir Matolín, and Iva Matolínová. "Heteroepitaxy of Cerium Oxide Thin Films on Cu(111)." Materials 8, no. 9 (September 18, 2015): 6346–59. http://dx.doi.org/10.3390/ma8095307.

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23

Dhanasankar, M., K. K. Purushothaman, and G. Muralidharan. "Enhanced electrochromism in cerium doped molybdenum oxide thin films." Materials Research Bulletin 45, no. 12 (December 2010): 1969–72. http://dx.doi.org/10.1016/j.materresbull.2010.08.009.

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24

Peña Leal, José Juan, and Rafael A. Barrio. "Modelling the structure of disordered cerium oxide thin films." Physica A: Statistical Mechanics and its Applications 483 (October 2017): 259–65. http://dx.doi.org/10.1016/j.physa.2017.04.152.

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25

Zhou, Jing, and David R. Mullins. "Rh-Promoted Methanol Decomposition on Cerium Oxide Thin Films." Journal of Physical Chemistry B 110, no. 32 (August 2006): 15994–6002. http://dx.doi.org/10.1021/jp061985v.

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26

Morshed, A. H., M. E. Moussa, N. El-Masry, and S. M. Bedair. "Luminescence of Epitaxial Cerium Oxide Films on Silicon Substrates." Materials Science Forum 239-241 (January 1997): 291–94. http://dx.doi.org/10.4028/www.scientific.net/msf.239-241.291.

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27

Chiu, Fu-Chien, and Chih-Ming Lai. "Optical and electrical characterizations of cerium oxide thin films." Journal of Physics D: Applied Physics 43, no. 7 (February 5, 2010): 075104. http://dx.doi.org/10.1088/0022-3727/43/7/075104.

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28

Fernandes Vaz, Isabela Cristina, Ana Cristina Tolentino Cabral, Alley Michael Silva Procópio, and Francisco Moura Filho. "Films based on cerium oxide sensitive to carbon monoxide." Materials Letters 308 (February 2022): 131174. http://dx.doi.org/10.1016/j.matlet.2021.131174.

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29

Velusamy, P., R. Ramesh Babu, K. Ramamurthi, M. S. Dahlem, and E. Elangovan. "Highly transparent conducting cerium incorporated CdO thin films deposited by a spray pyrolytic technique." RSC Advances 5, no. 124 (2015): 102741–49. http://dx.doi.org/10.1039/c5ra15262c.

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30

Chihi, Adel, and Brahim Bessais. "Characterization and photoelectrochemical properties of CICS thin films grown via an electrodeposition route." RSC Advances 7, no. 47 (2017): 29469–80. http://dx.doi.org/10.1039/c7ra04330a.

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In this work, cerium doped CuInS₂ (CIS) polycrystalline thin films with different Ce content are firstly synthesized on indium doped tin oxide (ITO) glass via a low-cost electrochemical technique.

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31

Yang, Nan, Pasquale Orgiani, Elisabetta Di Bartolomeo, Vittorio Foglietti, Piero Torelli, Anton V. Ievlev, Giorgio Rossi, et al. "Effects of Dopant Ionic Radius on Cerium Reduction in Epitaxial Cerium Oxide Thin Films." Journal of Physical Chemistry C 121, no. 16 (April 18, 2017): 8841–49. http://dx.doi.org/10.1021/acs.jpcc.7b00386.

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32

Hassen, Maryam M., and Isam MJbrahim. "Synthesis of Polyaniline–Cerium Oxide Nanocomposite for Photodetector Application." Journal of Physics: Conference Series 2114, no. 1 (December 1, 2021): 012047. http://dx.doi.org/10.1088/1742-6596/2114/1/012047.

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Abstract In this paper nanocomposites materials of Polyaniline (PAni) nano-fiber (NFs) and Cerium oxide (CeO2) nanoparticles (NPs) were prepared by two method; hydrothermal and chemical method respectively. The spin coating method was used to prepare PAni and Pani/CeO2 on Si and glass substrates and then screened with XRD, FE-SEM, UV-Vis and as-prepared thin-film photodetectors. The X-ray diffraction pattern of all the prepared films showed the presence of crystalline nature. It was found that the PAni/CeO2 films have a cubic crystal structure.. FESEM results proved that the PAni film prepared have nanofiber like structure, while the PAni/CeO2 films proved that CeO2 NPs fully caped with PAni nanofiber. The UV-Vis spectra showed peaks of PAni 340nm, 651nm and PAni/CeO2 320nm, 620 nm and in the energy gap it is noticed that the band gap value decreases as the CeO2 ratios increases where the maximum values of energy gap of B-band and Q-band (1.65 – 2.74) eV. The maximum sensitivity values of the photoconductive detectors were observed at PAni/CeO2 (2 vol.%) nanoparticles deposited on n-Si substrate which were approximately (2696.5%, 946.15%, 1402.2%, 1613.9%3837.9%, and 2700%) for wavelengths 360, 465, 510, 595,660 and 965 nm respectively.

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33

Chibisov, Andrey N., Maxim A. Pugachevskii, Alexander P. Kuzmenko, Myo Min Than, and Alexey I. Kartsev. "Effect of morphology and size on the thermodynamic stability of cerium oxide nanoparticles: Experiment and molecular dynamics calculation." Nanotechnology Reviews 11, no. 1 (January 1, 2022): 620–24. http://dx.doi.org/10.1515/ntrev-2022-0038.

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Abstract Cerium oxide nanoparticles have unique catalytic and oxygen storage capacity properties. In this work, the morphology and size of cerium oxide nanoparticles were experimentally and theoretically investigated. For the synthesis of nanoparticles, the laser ablation method was used. The analysis of the size and morphological characteristics of nanoparticles was performed using transmission electron microscopy. Using the method of molecular dynamics, we reveal the limiting dimensional transition from octahedral morphology to a spherical form in cerium oxide nanoparticles. The results obtained will be relevant for the controlled synthesis of nanostructured materials based on cerium oxide.

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34

Bercha, Sofiia, Suman Bhasker-Ranganath, Xiaohui Zheng, Klára Beranová, Mykhailo Vorokhta, Robert G. Acres, Tomáš Skála, et al. "Adsorption structure of adenine on cerium oxide." Applied Surface Science 530 (November 2020): 147257. http://dx.doi.org/10.1016/j.apsusc.2020.147257.

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35

PIRHADY TAVANDASHTI, NAHID, and SOHRAB SANJABI. "Synthesis of Oxide Nanoparticles in Hybrid Nanocomposite Coatings as Nanoreservoirs of Corrosion Inhibitors." International Journal of Modern Physics: Conference Series 05 (January 2012): 234–41. http://dx.doi.org/10.1142/s2010194512002073.

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Nanostructured hybrid silica/epoxy films containing boehmite nanoparticles were investigated in the present work as pretreatments for AA2024 alloy. To produce the nanocomposite sol-gel films, boehmite nanoparticles prepared from hydrolysis/condensation of aluminum isopropoxide ( AlI ) were doped into another hybrid organosiloxane sol. The produced oxide nanoparticles have the capability to act as nanoreservoirs of corrosion inhibitors, releasing them controllably to protect the metallic substrate from corrosion. For this purpose the corrosion inhibitor, cerium nitrate, was introduced into the sol-gel system via loading the nanoparticles. The morphology and the structure of the hybrid sol-gel films were studied by Scanning Electron Microscopy (SEM). The corrosion protection properties of the films were investigated by Potentiodynamic Scanning (PDS) and Electrochemical Impedance Spectroscopy (EIS). The results show that the presence of boehmite nanoparticles highly improved the corrosion protection performance of the silica/epoxy coatings. Moreover, they can act as nanoreservoirs of corrosion inhibitors and provide prolonged release of cerium ions, offering a self-healing property to the film.

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36

Panda, Arun Kumar, Akash Singh, Maneesha Mishra, R. Thirumurugesan, P. Kuppusami, and E. Mohandas. "Plasma plume behavior of laser ablated cerium oxide: Effect of oxygen partial pressure." Laser and Particle Beams 32, no. 3 (June 6, 2014): 429–35. http://dx.doi.org/10.1017/s0263034614000330.

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AbstractThis paper describes the spatial and temporal investigation of laser ablated plasma plume of cerium oxide target using Langmuir probe. Cerium oxide target was ablated using a KrF (λ ~ 248 nm) gas laser. Experimental studies confirmed that oxygen partial pressure of 2 × 10−2mbar is sufficient enough to get good quality films of cerium oxide. At this pressure, plume was diagnosed for their spatial and temporal behavior. Spatial distribution was investigated at a distance of 15 mm, 30 mm, and up to a maximum distance of 45 mm from the target, whereas temporal behavior has been recorded in the range of 0 to 50 µS with an interval of 0.5 µS. The average electron densities are found to be maximum at 30 mm from the target position and the plasma current of the laser ablated ceria is found to be maximum at 22 µS.

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37

Gasperi, Gabriele, Lucia Amidani, Francesco Benedetti, Federico Boscherini, Pieter Glatzel, Sergio Valeri, and Paola Luches. "Electronic properties of epitaxial cerium oxide films during controlled reduction and oxidation studied by resonant inelastic X-ray scattering." Physical Chemistry Chemical Physics 18, no. 30 (2016): 20511–17. http://dx.doi.org/10.1039/c6cp04407g.

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We investigated the evolution of the electronic structure of cerium oxide ultrathin epitaxial films during reduction and oxidation processes using resonant inelastic X-ray scattering at the Ce L₃ absorption edge.

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38

Lavkova, Jaroslava, Ivan Khalakhan, Mykhailo Chundak, Mykhailo Vorokhta, Valerie Potin, Vladimir Matolin, and Iva Matolinova. "Growth and composition of nanostructured and nanoporous cerium oxide thin films on a graphite foil." Nanoscale 7, no. 9 (2015): 4038–47. http://dx.doi.org/10.1039/c4nr06550f.

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39

Hemalatha, K. S., and K. Rukmani. "Synthesis, characterization and optical properties of polyvinyl alcohol–cerium oxide nanocomposite films." RSC Advances 6, no. 78 (2016): 74354–66. http://dx.doi.org/10.1039/c6ra11126b.

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PVA–CeO₂ nanocomposite films were synthesized by solution casting method and exhibit tape like nanoribbon structure in the 25 wt% CeO₂ films. The 2.5 wt% and 25 wt% CeO₂ films are suitable for UV filters while the 2.5 wt% film shows highest photoluminescence.

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40

Lavrynenko, O. M., O. Yu Pavlenko, M. N. Zahornyi, and S. F. Korichev. "Morphology, phase and chemical composition of the nanostructures formed in the systems containing lanthanum, cerium, and silver." Himia, Fizika ta Tehnologia Poverhni 12, no. 4 (December 30, 2021): 382–92. http://dx.doi.org/10.15407/hftp12.04.382.

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X-ray phase and thermogravimetric analysis, scanning electron microscopy and energy-dispersion spectroscopy were used to study the products of phase formation during the precipitation of lanthanum and cerium salts in the presence of silver nitrate and recipients of precipitators, nucleating agents and hydrolysis regulators. Thermogravimetric analysis shows the completion of the La(OH)3 lattice dehydroxylation process at a temperature of ~ 300 °С and probable destruction of sulfates at a temperature of ~ 340 °С. The phase interaction of lanthanum oxide(III) with silver ends at T ~ 400 °C. The DTG curve shows a two-stage weight loss, which characterizes the destruction of lanthanum and silver hydroxides (250 °C) and the removal of sulfates (~ 340 °C), respectively. According to the TG, the total weight loss is 21.6 %. For the cerium-containing system the only endothermic effect of dehydroxylation of cerium hydroxide at T = 250 °C with its conversion into cerium dioxide is observed. The destruction of nitrates (anionic component of solutions) takes place at the temperature of 400 °C. Weight loss takes place at T = 150 °C and is 53.9 %. Thus, on the basis of TG-DTA data, it can be assumed that the formation of composites particles based on lanthanum and cerium oxides, modified with silver, ends at the temperature of 400 °C. The X-ray diffraction data shows that at the initial stage the system undergoes the formation of cerium and lanthanum hydroxides, and during lyophilization of the precipitate (T = 160 °C) the crystal lattice of hydroxides partial dehydroxylation takes place with the formation of trigonal oxides La2O3 and Ce2O3. It has been found that the presence of silver cations in the solution can affect the phase composition of lyophilized structures and the formation of the CeO2 phase. It is shown that the hydroxylamine chloride injection into the system can initiate the silver restoration on the lanthanum oxide surface and also partially restore it to the LaO phase. Temperature treatment of the samples (T = 400 °С) promotes homogenization of the precipitate composition: formation of 30 nm cerium dioxide particles with silver clusters evenly distributed on its surface, and hexagonal lanthanum oxide plates with individual silver particles as the second phase. In three-component systems, two modifications of lanthanum oxides (trigonal and cubic), cerium dioxide and metallic silver are formed. It is found that the chemical composition of the precipitates contains the main elements – La, Ce, O, Ag and impurity – S or Cl, as the anionic component of the initial solutions, N and K in the composition of the initial suspension. It is shown that the morphology of the samples is represented by hexagonal structures of lanthanum hydroxide and oxide, spherical and pseudocubic particles of cerium dioxide and lanthanum oxide, spherical clusters of silver.

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Kéomany, D., C. Poinsignon, and D. Deroo. "Sol gel preparation of mixed cerium—titanium oxide thin films." Solar Energy Materials and Solar Cells 33, no. 4 (August 1994): 429–41. http://dx.doi.org/10.1016/0927-0248(94)90003-5.

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Ševčíková, Klára, Václav Nehasil, Mykhailo Vorokhta, Stanislav Haviar, Vladimír Matolín, Iva Matolínová, Karel Mašek, et al. "Altering properties of cerium oxide thin films by Rh doping." Materials Research Bulletin 67 (July 2015): 5–13. http://dx.doi.org/10.1016/j.materresbull.2015.02.059.

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Fiorenza, P., G. Greco, G. Fisichella, F. Roccaforte, G. Malandrino, and R. Lo Nigro. "High permittivity cerium oxide thin films on AlGaN/GaN heterostructures." Applied Physics Letters 103, no. 11 (September 9, 2013): 112905. http://dx.doi.org/10.1063/1.4820795.

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Dao, Ngoc Nhiem, Minh Dai Luu, Quang Khuyen Nguyen, and Byung Sun Kim. "UV absorption by cerium oxide nanoparticles/epoxy composite thin films." Advances in Natural Sciences: Nanoscience and Nanotechnology 2, no. 4 (December 19, 2011): 045013. http://dx.doi.org/10.1088/2043-6262/2/4/045013.

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Larosa, Claudio, Rūta Saldābola, Jānis Zicāns, Remo Merijs Meri, Roberto Eggenhöffner, and Attilio Converti. "Prediction of Thermal Behavior of Polycarbonate/Cerium Oxide Composite Films." Chemical Engineering & Technology 44, no. 8 (June 29, 2021): 1534–40. http://dx.doi.org/10.1002/ceat.202100101.

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46

Zhu, Dapeng, Chenglong Hu, Rongzhi Zhao, Xiangyang Tan, Yixing Li, Vilko Mandić, Zhen Shi, and Xuefeng Zhang. "Fabrication of cerium oxide films with thickness and hydrophobicity gradients." Surface and Coatings Technology 430 (January 2022): 127985. http://dx.doi.org/10.1016/j.surfcoat.2021.127985.

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Uvarov, Vitalii, Jozef Krutel, Karel Mašek, Josef Mysliveček, and Viktor Johánek. "Thermal stability of cobalt oxide thin films and its enhancement by cerium oxide." Applied Surface Science 593 (August 2022): 153430. http://dx.doi.org/10.1016/j.apsusc.2022.153430.

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48

Uvarov, Vitalii, Jozef Krutel, Karel Mašek, Josef Mysliveček, and Viktor Johánek. "Thermal stability of cobalt oxide thin films and its enhancement by cerium oxide." Applied Surface Science 593 (August 2022): 153430. http://dx.doi.org/10.1016/j.apsusc.2022.153430.

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Jia, X. L., Y. Wang, R. S. Xin, Quan Li Jia, and Hai Jun Zhang. "Preparation of Rare-Earth Element Doped Titanium Oxide Thin Films and Photocatalysis Properties." Key Engineering Materials 336-338 (April 2007): 1946–48. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1946.

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Rare-earth doped porous nanocrystalline TiO2 films were prepared via sol-gel method. The effect of preparation conditions on the properties of the resulting thin films, such as structure, surface topography and photocatalysis properties was analyzed. It indicated that appropriate doping of rare-earth element improves the photocatalysis ability of the thin titanium oxide films. The thin titanium oxide films have good photocatalysis properties in visible light region because of the red shift of energy level. It also revealed that uni-doped of cobalt is better than that of cobalt and lanthanum, while co-doping of cerium, cobalt and lanthanum may cause the best photocatalysis properties.

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Ma, Mingyu, Houlong Liu, and Liqing Chen. "Effect of cerium on the initiation of pitting corrosion of 444-type heat-resistant ferritic stainless steel." High Temperature Materials and Processes 39, no. 1 (November 9, 2020): 576–87. http://dx.doi.org/10.1515/htmp-2020-0001.

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AbstractThe 444-type heat-resistant ferritic stainless steel is widely utilized in automotive exhaust pipes and solid oxide fuel cells, due to its excellent properties at elevated temperature. To meet the demands of significantly harsh service environments, rare earths were added in 444-type ferritic stainless steel. For the purpose of evaluating the effect of rare earths on pitting corrosion initiation, the metastable pitting corrosion behavior in 444-type ferritic stainless steel was studied through potentiodynamic polarization and potentiostatic polarization tests. The results demonstrated that pitting corrosion was initiated at the inclusion/alloy interface. The cerium alloying in 444-type ferritic stainless steel decreased the amount of preferential dissolution sites. The beneficial effect of Ce on pitting corrosion resulted from the formation of stable cerium oxides, as well as from the reduction in the amount and size of inclusions in 444-type ferritic stainless steel. In addition, electrochemical impedance spectroscopy test results revealed that cerium alloying enhanced the polarization resistance of passive films through insignificant thickness alteration.

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