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Hydrothermal growth mechanism of SnO₂ nanorods in aqueous HCl
- Leidich, Patrick, Mondeshki, Mihail, Barton, Bastian, Kolb, Ute, Panthöfer, Martin, Tremel, Wolfgang
- Zeitschrift für Naturforschung 2018 v.73 no.11 pp. 865-871
- Raman spectroscopy, anisotropy, hydrochloric acid, nanocrystals, nanorods, nuclear magnetic resonance spectroscopy, temperature, tin dioxide, transmission electron microscopy
- Rutile-type nanorods of SnO₂ were obtained in a one-pot hydrothermal synthesis starting from SnCl₄·5H₂O and HCl in a temperature range between 200 and 240°C. Although the nanorods are polydisperse, the average length of the nanorods could be adjusted from 13 to 65 nm by varying of the reaction temperature. The resulting anisotropic nanocrystals were characterized using powder X-ray diffraction (PXRD), (high resolution-) transmission electron microscopy (HR-TEM), and selected area electron diffraction (SAED). The particle growth proceeds via a dissolution-recrystallization process with soluble [SnCl₅(H₂O)]⁻ intermediates, as confirmed by PXRD, Raman spectroscopy, and magic angle spinning nuclear magnetic resonance (MAS-NMR).