期刊
NANO LETTERS
卷 14, 期 11, 页码 6505-6509出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl503077y
关键词
Cation ordering; inverse spinel; scanning transmission electron microscopy (STEM); density functional theory (DFT) calculations
类别
资金
- National Science Foundation [CMMI-1129979]
- Army Research Office [W911NF-08-0299]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1358673] Funding Source: National Science Foundation
By using high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) coupled with density functional theory (DFT) calculations, we demonstrate the atomic-level imaging of cation ordering in inverse spinel Zn2SnO4 nanowires. This cation ordering was identified as 1:1 ordering of Zn2+ and Sn4+ at the octahedral sites of the inverse spinel crystal with microscopic symmetry transition from original cubic Fd3m to orthorhombic Imma group. This ordering generated a 67.8% increase in the elastic modulus and 1-2 order of magnitude lower in the electric conductivity and electron mobility compared to their bulk counterpart.
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