منابع مشابه
Upconversion - Pumped Cerium Lasers
Intrinsic Instability, multistability and hysteresis have been observed in the photoluminescence of bulk glass doped with Yb and Tm impurities at room temperature. Hysteretic switching of laser output also occurs near threshold in channel waveguides in this material. Local field effects are shown to present new, fundamental design limitations for compact optical amplifiers and oscillators. 42.6...
متن کاملCerium(III) dihydroxidohexaoxidotetraborate chloride
The crystal structure of the title compound, Ce[B(4)O(6)(OH)(2)]Cl, is built from polyborate sheets parallel to the (001) plane. These sheets stack along the [001] direction and are linked by Ce atoms exhibiting an CeO(8)Cl(2) coordination sphere. O-H⋯O and O-H⋯Cl hydrogen bonds additionally stabilize the structural set-up. The polyborate sheet is made up of zigzag borate chains running along t...
متن کاملCerium oxide nanoparticles in cancer
With the development of many nanomedicines designed for tumor therapy, the diverse abilities of cerium oxide nanoparticles (CONPs) have encouraged researchers to pursue CONPs as a therapeutic agent to treat cancer. Research data have shown CONPs to be toxic to cancer cells, to inhibit invasion, and to sensitize cancer cells to radiation therapy and chemotherapy. CONPs also display minimal toxic...
متن کاملTwinned caesium cerium(IV) pentafluoride
Single-crystals of CsCeF5 were synthesized hydro-thermally. The crystal under investigation was twinned by pseudo-merohedry with a twofold rotation around the c axis as an additional twinning operation. The crystal structure is built of layers of distorted edge- and corner-sharing CeF8 square-anti-prisms. The Cs(+) cations are located between the layers and exhibit coordination numbers of nine....
متن کاملB3LYP calculations of cerium oxides.
In this paper we evaluate the performance of density functional theory with the B3LYP functional for calculations on ceria (CeO(2)) and cerium sesquioxide (Ce(2)O(3)). We demonstrate that B3LYP is able to describe CeO(2) and Ce(2)O(3) reasonably well. When compared to other functionals, B3LYP performs slightly better than the hybrid functional PBE0 for the electronic properties but slightly wor...
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ژورنال
عنوان ژورنال: Science
سال: 1912
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.35.907.776