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- W2127653609 abstract "Surface properties play an important role in understanding and controlling nanocrystalline materials. The accumulation of dopants on the surface, caused by surface segregation, can therefore significantly affect nanomaterials properties at low doping levels, offering a way to intentionally control nanoparticles features. In this work, we studied the distribution of chromium ions in SnO 2 nanoparticles prepared by a liquid precursor route at moderate temperatures (500°C). The powders were characterized by infrared spectroscopy, X ‐ray diffraction, (scanning) transmission electron microscopy, Electron Energy Loss Spectroscopy, and M össbauer spectroscopy. We showed that this synthesis method induces a limited solid solution of chromium into SnO 2 and a segregation of chromium to the surface. The s ‐electron density and symmetry of Sn located on the surface were significantly affected by the doping, while Sn located in the bulk remained unchanged. Chromium ions located on the surface and in the bulk showed distinct oxidation states, giving rise to the intense violet color of the nanoparticles suitable for pigment application." @default.
- W2127653609 created "2016-06-24" @default.
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- W2127653609 date "2011-10-04" @default.
- W2127653609 modified "2023-10-06" @default.
- W2127653609 title "Surface Segregation in Chromium-Doped Nanocrystalline Tin Dioxide Pigments" @default.
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- W2127653609 doi "https://doi.org/10.1111/j.1551-2916.2011.04868.x" @default.
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