A highly sensitive γ-radiation dosimeter based on the CeO2 nanowires

Li, Yingying; Xiang, Dong; Gao, Jicheng; Hei, Daqian; Zhou, Xuechao; Zhang, Haiqian

doi:10.1016/j.physe.2009.04.036

Cited by 22 publications

(9 citation statements)

References 19 publications

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“…Ceria (CeO 2 ) nanostructures have attracted the interest of many researchers in the past decade due to their great potential for applications in catalysis, electrochromic devices, gas sensors, ultraviolet radiation detectors, environmentally-friendly pigments, gamma radiation dosimetry, etc. 1 Concerning its magnetic properties, room temperature ferromagnetism (RTFM) for transition metal doped 2 and undoped 3 systems have been observed in some experimental results. These results launch the CeO 2 systems to the class of materials known as dilute magnetic oxides (DMOs) with potential for application in the development of spintronic devices.…”

Section: Introductionmentioning

confidence: 99%

The role of oxygen vacancies and their location in the magnetic properties of Ce_1−xCu_xO_2−δ nanorods

Bernardi

Mesquita

Béron

et al. 2015

Phys. Chem. Chem. Phys.

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Ceria (CeO2) is a promising dilute magnetic semiconductor. Several studies report that the intrinsic and extrinsic structural defects are responsible for room temperature ferromagnetism in undoped and transition metal doped CeO2 nanostructures; however, the nature of the kind of defect necessary to promote and stabilize the ferromagnetism in such a system is still a matter of debate. In the work presented here, nanorods from the system Ce1-xCuxO2-δ with x = 0, 0.01, 0.03, 0.05 and 0.10, with the more stable {111} surface exposed were synthesized by a microwave-assisted hydrothermal method. A very careful structure characterization confirms that the Cu in the samples assumes a majority 2+ oxidation state, occupying the Ce (Ce(4+) and Ce(3+)) sites with no secondary phases up to x = 0.05. The inclusion of the Cu(2+) in the CeO2 structure leads to the introduction of oxygen vacancies in a density proportional to the Cu(2+) content. It is supposed that the spatial distribution of the oxygen vacancies follows the Cu(2+) distribution by means of the formation of a defect complex consisting of Cu(2+) ion and an oxygen vacancy. Superconducting quantum interference device magnetometry demonstrated a diamagnetic behavior for the undoped sample and a typical paramagnetic Curie-Weiss behavior with antiferromagnetic interactions between the Cu(2+) ions for the single phase doped samples. We suggest that the presence of oxygen vacancies is not a sufficient condition to mediate ferromagnetism in the CeO2 system, and only oxygen vacancies in the surface of nanostructures would lead to such a long range magnetic order.

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Section: Introductionmentioning

confidence: 99%

The role of oxygen vacancies and their location in the magnetic properties of Ce_1−xCu_xO_2−δ nanorods

Bernardi

Mesquita

Béron

et al. 2015

Phys. Chem. Chem. Phys.

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“…In fact, the substitution of a part Ce 4 þ by other suitable cations improves the low temperature reducibility and the oxygen storage capacity of cerium oxide [19]. However, CeO 2 may also be useful for radiation dosimeters [20,21] because nuclear radiations modify the electrical conductivity of CeO 2 film structures. Moreover, the cerium oxide film has potential applications in optical, electro-optical, and optoelectronic devices [22].…”

Section: Introductionmentioning

confidence: 99%

Rapid thermal annealing of cerium dioxide thin films sputtered onto silicon (111) substrates: Influence of heating rate on microstructure and electrical properties

Guhel

Toloshniak

Bernard

et al. 2015

Materials Science in Semiconductor Processing

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“…In fact, the substitution of a part Ce 4+ by other suitable cations improves the low temperature reducibility and the oxygen storage capacity of cerium oxide [19]. However, CeO 2 may also be useful for radiation dosimeters [20,21] because nuclear radiations modify the electrical properties of CeO 2 film structures. Moreover, cerium oxide film has potential applications in optical, electro-optical, and optoelectronic devices [22].…”

Section: Introductionmentioning

confidence: 99%

In situ Raman characterization of CeO2 thin films sputtered on (111) Si in order to optimize the post growth annealing parameters

Guhel

Bernard

Boudart

2014

Microelectronic Engineering

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A highly sensitive γ-radiation dosimeter based on the CeO2 nanowires

Cited by 22 publications

References 19 publications

The role of oxygen vacancies and their location in the magnetic properties of Ce_1−xCu_xO_2−δ nanorods

The role of oxygen vacancies and their location in the magnetic properties of Ce_1−xCu_xO_2−δ nanorods

Rapid thermal annealing of cerium dioxide thin films sputtered onto silicon (111) substrates: Influence of heating rate on microstructure and electrical properties

In situ Raman characterization of CeO2 thin films sputtered on (111) Si in order to optimize the post growth annealing parameters

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A highly sensitive γ-radiation dosimeter based on the CeO2 nanowires

Cited by 22 publications

References 19 publications

The role of oxygen vacancies and their location in the magnetic properties of Ce1−xCuxO2−δ nanorods

The role of oxygen vacancies and their location in the magnetic properties of Ce1−xCuxO2−δ nanorods

Rapid thermal annealing of cerium dioxide thin films sputtered onto silicon (111) substrates: Influence of heating rate on microstructure and electrical properties

In situ Raman characterization of CeO2 thin films sputtered on (111) Si in order to optimize the post growth annealing parameters

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The role of oxygen vacancies and their location in the magnetic properties of Ce_1−xCu_xO_2−δ nanorods

The role of oxygen vacancies and their location in the magnetic properties of Ce_1−xCu_xO_2−δ nanorods