Narrow-Diameter Tubular One-Dimensional van der Waals Heterostructures
The inherent flexibility of individual layers in two-dimensional (2D) materials enables them to be rolled up into tubular structures, thereby combining the properties of 1D and 2D materials and further expanding their range of applications. Even greater opportunities arise when two or more layers of...
| Autores: | , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/404554 |
| Acceso en línea: | http://hdl.handle.net/10261/404554 |
| Access Level: | acceso abierto |
| Palabra clave: | Inorganic nanotubes Metal halide Filled carbon nanotubes Strain Curved 2D materials Encapsulation Confinement |
| Sumario: | The inherent flexibility of individual layers in two-dimensional (2D) materials enables them to be rolled up into tubular structures, thereby combining the properties of 1D and 2D materials and further expanding their range of applications. Even greater opportunities arise when two or more layers of different materials are combined forming 1D tubular van der Waals heterostructures. Herein, we report on the synthesis, structural characterization, and electronic properties of narrow 1D van der Waals heterostructures, with internal diameters as low as ~1 nm. These are achieved by template-assisted growth of highly crystalline, single-layer lutetium halide (LuX₃, X = Cl, Br, I) nanotubes confined within the cavities of single-walled carbon nanotubes. Aberration-corrected electron microscopy, along with image simulation, has been employed to evaluate the role that the halide plays in the formation of such narrow heterostructures. The crystal structure of the employed halides has been determined by means of synchrotron radiation, and DFT calculations of the resulting metal halide nanotubes reveal a rich relationship between chirality and electronic/optical properties. The observed spatial separation of band-edge states can be important for photovoltaic applications facilitating the separation of photogenerated electron-hole pairs. |
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