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Isheim, Dieter; Kaszpurenko, Jason; Yu, Dong; Mao, Zugang; Seidman, David N.; Arslan, Ilke |
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3-D Atomic-Scale Mapping of Manganese Dopants in Lead Sulfide Nanowires |
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Journal Article |
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2012 |
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J. Phys. Chem. C |
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The Journal of Physical Chemistry C |
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116 |
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11 |
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6595-6600 |
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Dopants in nanowires, whether intentional or unintentional, can ultimately control the material?s properties and, therefore, need to be understood on the atomic scale. We study vapor?liquid?solid grown manganese-doped lead sulfide nanowires by atom-probe tomography for the first time for lead salt materials. The three-dimensional chemical concentration maps at the atomic scale demonstrate a radial distribution profile of Mn ions, with a concentration of only 0.18 and 0.01 at. % for MnCl2 and Mn-acetate precursors, respectively. The ability to characterize these small concentrations of dopant atoms in Pb1?xMnxS nanowires (x = 0.0036 and 0.0002), important for spintronic and thermoelectric devices, sets a platform for similar analyses for all nanostructures. First-principles calculations confirm that Mn atoms substitute for Pb in the PbS structure. |
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American Chemical Society |
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1932-7447 |
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doi: 10.1021/jp300162t |
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NU @ karnesky @ |
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11346 |
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