NOxを吸着したLa_{2 x}Ba_xSrCu₂O₆〓の表面化学結合状態

抄録

The surface chemical binding states of NOx-adsorbed La_2xBa_xSrCu₂O₆_??_ 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.