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题名: Designing of metallic nanocrystals embedded in non-stoichiometric perovskite nanomaterial and its surface-electronic characteristics
作者: Suriyaprakash, Jagadeesh;  Xu, Y. B.;  Zhu, Y. L.;  Yang, L. X.;  Tang, Y. L.;  Wang, Y. J.;  Li, S.;  Ma, X. L.
发表日期: 2017-8-21
摘要: Engineering of novel functional nanocomposite as like as the metallic nanocrystals supported non-stoichiometric perovskite nanomaterial in controlled parameters (size, shape and ratio of chemical characteristics) is a challengeable task. In this context, we present a facile route to fabricate and study its physicochemical property at real time mode in this report. Nanoscale pure Pb crystals surfaced on non-stoichiometric A-site deficient Pb1-xTiO3-gamma nanoparticle were fabricated when a precursor lead titanate (PbTiO3) nanoparticle was exposed to an electron beam irradiation (EBI) in a transmission electron microscope (TEM) at ambient temperature. In the state of the art, the chemical states and electronic structure of non-irradiated and irradiated PbTiO3 were studied by X-ray photoelectron spectroscopy (XPS). Electron bombardment resulted in a new visible feature at low binding energy in the Pb 4f core level, while Ti 2p and O 1s line shape showed slight changes. The Fermi level of the corresponding materials was determined to be 1.65 +/- 0.1 eV and 2.05 +/- 0.1 eV above the valence band maximum, respectively. The normal, weakly p-type PTO exhibits peculiar n-type feature after EBI process (The Fermi level moves near to the conduction band). A feasible mechanism is proposed involving the electron-stimulated local bond-breaking phenomenon in PbTiO3.
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Recommended Citation:
Suriyaprakash, Jagadeesh,Xu, Y. B.,Zhu, Y. L.,et al. Designing Of Metallic Nanocrystals Embedded In Non-stoichiometric Perovskite Nanomaterial And Its Surface-electronic Characteristics[J]. Nature Publishing Group,2017,7:-.

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