UV absorption properties of ceria-modified compositions within the fluorite-type solid solution CeO2–Y6WO12

Cheviré, François; Muñoz, Francisco; Baker, Charles F.; Tessier, Franck; Larcher, O.; Boujday, Souhir; Colbeau‐Justin, Christophe; Marchand, R.

doi:10.1016/j.jssc.2006.06.013

Cited by 42 publications

(28 citation statements)

References 20 publications

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“…22),23) Keeping starting from the tungstate Y6WO12, we have investigated the influence of both cationic and anionic substitutions on the optical properties through the study of two fluorite-type solid solutions: Y6(W1-xMox)O12 and Y6W(O12-3/2xNx). 24) Here, low nitrogen contents were investigated in the way to prepare white or pale yellow compositions that exhibit an absorption edge located around 400 nm (3.1 eV) giving them potential interest as inorganic UV absorbers.…”

Section: Uv Absorbersmentioning

confidence: 99%

Optical properties of oxynitride powders

Tessier

Maillard

Cheviré

et al. 2009

J. Ceram. Soc. Japan

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Section: Uv Absorbersmentioning

confidence: 99%

Optical properties of oxynitride powders

Tessier

Maillard

Cheviré

et al. 2009

J. Ceram. Soc. Japan

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“…The typical absorption peak that appears at 315 nm (3.93 eV) for bulk CeO 2 is due to the charge transfer from 2p (O) orbital to 4f (Ce) orbital. [37] The typical band gap absorption peak of the synthesized undoped CeO 2 nanostructures appears at 311 nm (3.98 eV), which is blue shifted as compared to the bulk CeO 2 , as shown in Figure 4. This shift is also previously reported and is suggested to be due to the quantum confinement effects.…”

Section: B Cell Culture and Treatmentmentioning

confidence: 88%

Mg Doping Induced Effects on Structural, Optical, and Electrical Properties as Well as Cytotoxicity of CeO2 Nanostructures

Iqbal

Jan

Awan³

et al. 2016

Metall Mater Trans B

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Here, Mg x Ce 1Àx O 2 (where x = 0, 0.01, 0.02, 0.03, 0.04, and 0.05) nanostructures have been successfully synthesized by using a simple, easy, and cost-effective soft chemical method. X-ray diffraction (XRD) patterns substantiate the single-phase formation of a CeO 2 cubic fluorite structure for all samples. Infrared spectroscopy results depict the presence of peaks only related to Ce-O bonding, which confirms the XRD results. It has been observed via ultraviolet (UV)-visible spectroscopy that Mg doping has tuned the optical band gap of CeO 2 significantly. The electrical conductivity of CeO 2 nanostructures has been found to increase with Mg doping, which is attributed to enhancement in carrier concentration due to the different valance states of dopant and host ions. Selective cytotoxic behavior of Mg x Ce 1Àx O 2 nanostructures has been determined for neuroblastoma (SH-SY5Y) cancerous and HEK-293 healthy cells. Both doped and undoped CeO 2 nanostructures have been found to be toxic for cancer cells and safe toward healthy cells. This selective toxic behavior of the synthesized nanostructures has been assigned to the different levels of reactive oxygen species (ROS) generation in different types of cells. This makes the synthesized nanostructures a potential option for cancer therapy in the near future.

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“…In CeO 2 , the experimental energy gap between O 2p and Ce 4f orbitals ranges from 3.0 eV to 3.19 eV, [ 44,45 ] whereas in TiO 2 , the experimental energy gap between O 2p and Ti 3d orbitals ranges from 3.0 to 3.05 eV. [ 46,47 ] This indicates no direct preference as to whether the Ti 3d or Ce 4f orbitals reduces fi rst.…”

Section: Density Functional Theory Calculationsmentioning

confidence: 98%

Linking Interfacial Step Structure and Chemistry with Locally Enhanced Radiation‐Induced Amorphization at Oxide Heterointerfaces

Aguiar

Dholabhai

et al. 2014

Adv Materials Inter

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Nanostructured materials and their interfaces have attracted recent interest for their functionality in a wide variety of different applications. However, the origins of these properties in several instances remain unknown. One promising aspect of nanomaterials is their role in materials design for mitigating radiation damage. In particular, engineered radiation tolerant materials would exploit the presence of internal interfaces to act as recombination centers and suppress damage accumulation. Realizing this promise, however, requires a fundamental understanding of how radiation‐induced defects interact with interfaces. Thus, studying the interfacial atomic structure and chemistry before and after irradiation is critical. In this study, we have performed transmission electron microscopy on a series of pristine and ion‐irradiated oxide interfaces to probe radiation‐induced effects. The CeO2/SrTiO3 interface, chosen as a model system for these studies, is characterized by differences in SrTiO3 terminations or steps. Our salient result is that steps are centers for preferential amorphization in SrTiO3, which we attribute to defect flow across the interface induced by non‐stoichiometry in CeO2. The study concludes the interfacial atomic ordering in the form of steps thereby modifies the response to ion irradiation and suggests interface patterning as another parameter to functionalize radiation tolerant materials.

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UV absorption properties of ceria-modified compositions within the fluorite-type solid solution CeO2–Y6WO12

Cited by 42 publications

References 20 publications

Optical properties of oxynitride powders

Optical properties of oxynitride powders

Mg Doping Induced Effects on Structural, Optical, and Electrical Properties as Well as Cytotoxicity of CeO2 Nanostructures

Linking Interfacial Step Structure and Chemistry with Locally Enhanced Radiation‐Induced Amorphization at Oxide Heterointerfaces

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