One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes
Crystals of NaSn<sub>2</sub>F<sub>5</sub> were obtained from an aqueous solution. Their morphology and habitus were studied via scanning electron microscopy and X-ray phase diffraction analysis. The crystals obtained have a long prismatic shape with a very large aspect ratio...
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MDPI AG
2023-07-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/7/1065 |
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| author | Ruslan M. Zakalyukin Ekaterina A. Levkevich Andrey S. Kumskov |
| author_facet | Ruslan M. Zakalyukin Ekaterina A. Levkevich Andrey S. Kumskov |
| author_sort | Ruslan M. Zakalyukin |
| collection | DOAJ |
| description | Crystals of NaSn<sub>2</sub>F<sub>5</sub> were obtained from an aqueous solution. Their morphology and habitus were studied via scanning electron microscopy and X-ray phase diffraction analysis. The crystals obtained have a long prismatic shape with a very large aspect ratio (>100). The faceting of the crystal is represented by the <i>(110)</i> face, while the <i>(100)</i> face is practically absent. A nanocomposite incorporating one-dimensional (1D) NaSn<sub>2</sub>F<sub>5</sub>@SWCNT crystals was synthesized from the melt by means of the capillary wetting technique. The embedded fragment is represented by two planes of Sn cations, which provide contrast in high-resolution electron microscopy images. The cation plane is represented by the <i>(110)</i> crystallographic plane of the NaSn<sub>2</sub>F<sub>5</sub> structure. The crystallographic direction <i>[2</i><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mrow><mn>2</mn></mrow><mo>¯</mo></mover></mrow></semantics></math></inline-formula><i>3]</i> coincides with the nanotube axis. The first layer of Sn cations forms a hexagonal network with Sn atoms at its nodes. The tin atoms in the second layer are arranged according to the closest spherical packing law in a plane, but with a distance between atoms that is two times greater than that in the first layer. Sn cations’ hexagon sizes are ~0.87 nm and ~0.69 nm in size. According to the Raman spectroscopy data, the nanocomposite behaves as an electron acceptor. The SWCNT diameter of 1.54 nm revealed using NaSn<sub>2</sub>F<sub>5</sub>@SWCNT Raman spectroscopy corresponds to their diameter in electron microscope images and the diameter used for modeling. |
| first_indexed | 2024-03-11T01:10:53Z |
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| language | English |
| last_indexed | 2024-03-11T01:10:53Z |
| publishDate | 2023-07-01 |
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| series | Crystals |
| spelling | doaj.art-9612650109844299bdadc1031fb15b362023-11-18T18:53:56ZengMDPI AGCrystals2073-43522023-07-01137106510.3390/cryst13071065One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon NanotubesRuslan M. Zakalyukin0Ekaterina A. Levkevich1Andrey S. Kumskov2Shubnikov Institute of Crystallography, Federal Scientific Research Centre «Crystallography and Photonics», Russian Academy of Sciences, Leninskiy Prospekt, 59, Moscow 119333, RussiaShubnikov Institute of Crystallography, Federal Scientific Research Centre «Crystallography and Photonics», Russian Academy of Sciences, Leninskiy Prospekt, 59, Moscow 119333, RussiaShubnikov Institute of Crystallography, Federal Scientific Research Centre «Crystallography and Photonics», Russian Academy of Sciences, Leninskiy Prospekt, 59, Moscow 119333, RussiaCrystals of NaSn<sub>2</sub>F<sub>5</sub> were obtained from an aqueous solution. Their morphology and habitus were studied via scanning electron microscopy and X-ray phase diffraction analysis. The crystals obtained have a long prismatic shape with a very large aspect ratio (>100). The faceting of the crystal is represented by the <i>(110)</i> face, while the <i>(100)</i> face is practically absent. A nanocomposite incorporating one-dimensional (1D) NaSn<sub>2</sub>F<sub>5</sub>@SWCNT crystals was synthesized from the melt by means of the capillary wetting technique. The embedded fragment is represented by two planes of Sn cations, which provide contrast in high-resolution electron microscopy images. The cation plane is represented by the <i>(110)</i> crystallographic plane of the NaSn<sub>2</sub>F<sub>5</sub> structure. The crystallographic direction <i>[2</i><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mrow><mn>2</mn></mrow><mo>¯</mo></mover></mrow></semantics></math></inline-formula><i>3]</i> coincides with the nanotube axis. The first layer of Sn cations forms a hexagonal network with Sn atoms at its nodes. The tin atoms in the second layer are arranged according to the closest spherical packing law in a plane, but with a distance between atoms that is two times greater than that in the first layer. Sn cations’ hexagon sizes are ~0.87 nm and ~0.69 nm in size. According to the Raman spectroscopy data, the nanocomposite behaves as an electron acceptor. The SWCNT diameter of 1.54 nm revealed using NaSn<sub>2</sub>F<sub>5</sub>@SWCNT Raman spectroscopy corresponds to their diameter in electron microscope images and the diameter used for modeling.https://www.mdpi.com/2073-4352/13/7/1065nanocompositecarbon nanotube1D crystalelectron microscopystructure modellingRaman spectroscopy |
| spellingShingle | Ruslan M. Zakalyukin Ekaterina A. Levkevich Andrey S. Kumskov One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes Crystals nanocomposite carbon nanotube 1D crystal electron microscopy structure modelling Raman spectroscopy |
| title | One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes |
| title_full | One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes |
| title_fullStr | One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes |
| title_full_unstemmed | One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes |
| title_short | One-Dimensional NaSn<sub>2</sub>F<sub>5</sub> Crystals Inside Single-Walled Carbon Nanotubes |
| title_sort | one dimensional nasn sub 2 sub f sub 5 sub crystals inside single walled carbon nanotubes |
| topic | nanocomposite carbon nanotube 1D crystal electron microscopy structure modelling Raman spectroscopy |
| url | https://www.mdpi.com/2073-4352/13/7/1065 |
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