Surface chemical binding states of NOx-adsorbed La<sub>2</sub> <sub>x</sub>Ba<sub>x</sub>SrCu<sub>2</sub>O<sub>6</sub>_??_

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  • NOxを吸着したLa<sub>2</sub> <sub>x</sub>Ba<sub>x</sub>SrCu<sub>2</sub>O<sub>6</sub>〓の表面化学結合状態

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Abstract

The surface chemical binding states of NOx-adsorbed La2xBaxSrCu2O6_??_ were investigated by X-ray photoelectron spectroscopy (XPS) analysis. The chemical shift of Cu2p XPS peak for LaBaSrCu2O6_??_indicated the increasing hole concentrations at the level of 02p with NO and NO2 adsorption. On the other hand, the chemical shift of Cu2p XPS peak for La1. 5Ba0. 5SrCu2O6_??_indicated the decreasing hole concentrations at the level of 02p with NO adsorption. These results suggest that the Ba content affects the NOx gas-sensing properties of the layered-cuprates.

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