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Low temperature synthesis of bilayer hydrated cesium cobalt oxide |
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| Authors: | Horng Y Tang Hsiao Y Lin Ming Y Liao Jean L Liu Hwo S Sheu |
| Institution: | a Department of Applied Chemistry, National Chi Nan University, Puli, Taiwan b Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan c Department of Materials Science, National Tsing Hua University, Hsinchu, Taiwan d National Synchrotron Radiation Research Center, Hsinchu, Taiwan e Institute of Physics, Academia Sinica, Taipei, Taiwan |
| Abstract: | Bilayer hydrated Na0.35CoO2·1.3H2O structure has re-directed superconductivity research in recent years. Here, we develop a low temperature synthesis method to prepare a novel hydrous Cs0.2CoO2·0.63H2O compound in one step. The bilayer-hydrate of Cs0.2CoO2·0.63H2O with a greatest interlayer spacing d=10.0(2) Å among alkali cobalt oxides has been grown in crystal form. Magnetic susceptibility measurement of Cs0.2CoO2·0.63H2O displays a paramagnetic behavior down to 1.9 K. With the assistance of low temperature molten CsOH solvent, crystals of Rb0.30CoO2·0.36H2O and K0.35CoO2·0.4H2O can be grown. The results provide the capability for preparing a novel hydrous structure and the systematic investigation of interlayer coupling effect of alkali ion insertion compounds. |
| Keywords: | Hydrous cobalt oxide Bilayer hydrate Cesium hydroxide Rubidium cobalt oxide Magnetic susceptibility |
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