Atomic-resolution characterization on the structure of strontium doped barium titanate nanoparticles
Autor: | Xi Liu, Yixiao Zhang, Haoyu Jiang, Liwei Chen, Haifeng Qu, Jizhen Qi, Wei Lu, Jiahui Qian, Pei Liu, Dongchang Wu |
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Rok vydání: | 2021 |
Předmět: |
Materials science
High-angle annular dark-field scanning transmission electron microscopy Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Tetragonal crystal system Scanning transmission electron microscopy Barium titanate nanoparticles General Materials Science Electrical and Electronic Engineering Ceramic capacitor Integrated differential phase contrast Doping effect Doping 021001 nanoscience & nanotechnology Condensed Matter Physics Ferroelectricity Atomic and Molecular Physics and Optics 0104 chemical sciences Structural transition chemistry Barium titanate 0210 nano-technology Powder diffraction |
Zdroj: | Jiang, H, Qi, J, Wu, D, Lu, W, Qian, J, Qu, H, Zhang, Y, Liu, P, Liu, X & Chen, L 2021, ' Atomic-resolution characterization on the structure of strontium doped barium titanate nanoparticles ', Nano Research, vol. 14, no. 12, pp. 4802-4807 . https://doi.org/10.1007/s12274-021-3431-y |
ISSN: | 1998-0000 1998-0124 |
Popis: | Ferroelectric barium titanate nanoparticles (BTO NPs) may play critical roles in miniaturized passive electronic devices such as multi-layered ceramic capacitors. While increasing experimental and theoretical understandings on the structure of BTO and doped BTO have been developed over the past decade, the majority of the investigation was carried out in thin-film materials; therefore, the doping effect on nanoparticles remains unclear. Especially, doping-induced local composition and structure fluctuation across single nanoparticles have yet to be unveiled. In this work, we use electron microscopy-based techniques including high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), integrated differential phase contrast (iDPC)-STEM, and energy dispersive X-ray spectroscopy (EDX) mapping to reveal atomically resolved chemical and crystal structure of BTO and strontium doped BTO nanoparticles. Powder X-ray diffraction (PXRD) results indicate that the increasing strontium doping causes a structural transition from tetragonal to cubic phase, but the microscopic data validate substantial compositional and microstructural inhomogeneities in strontium doped BTO nanoparticles. Our work provides new insights into the structure of doped BTO NPs and will facilitate the materials design for next-generation high-density nano-dielectric devices. |
Databáze: | OpenAIRE |
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