A HRTEM and EELS study of Pd/ZnO polar interfaces

作者：Sakaguchi N^*; Suzuki Y; Watanabe K; Iwama S; Watanabe S; Ichinose H

来源：Philosophical Magazine, 2008, 88(10): 1493-1509.

DOI：10.1080/14786430802203406

• HRTEM
• EELS
• polar interface
• atomic structure
• chemical bonding
• ab initio calculation

Atomic and electronic structures of interfaces in an internally oxidized Pd/ZnO system were Studied by high-resolution transmission electron microscopy (HRTEM) and electron energy-loss spectroscopy (EELS). {0001}(ZnO) polar planes tend to be parallel to the interface. A ZnO precipitate was terminated by an oxygen (0001) surface at one end of the precipitate and by a zinc (0001) surface at the other end of the precipitate. A pre-edge peak was detected only in O-K energy-loss near-edge spectra (ELNES) acquired from the oxygen-terminated interface. Ab initio, calculations indicated that the origin of the pre-edge peak could be attributed to the strong chemical bonding and hybridization of Pd-d and O-p orbitals at the oxygen-terminated polar interface.

• 出版日期2008-4-1