Low-Dimensional Semiconductor Superlattices Formed by Geometric Control over Nanocrystal Attachment
| Autor: | Evers, W.H., Goris, B., Bals, S., Casavola, M., de Graaf, J., van Roij, R.H.H.G., Dijkstra, M., Vanmaekelbergh, D.A.M., Condensed Matter and Interfaces, Soft Condensed Matter and Biophysics, Theoretical Physics, Sub Condensed Matter and Interfaces, Sub Inorganic Chemistry and Catalysis, Sub Soft Condensed Matter, Sub Cond-Matter Theory, Stat & Comp Phys |
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| Přispěvatelé: | Condensed Matter and Interfaces, Soft Condensed Matter and Biophysics, Theoretical Physics, Sub Condensed Matter and Interfaces, Sub Inorganic Chemistry and Catalysis, Sub Soft Condensed Matter, Sub Cond-Matter Theory, Stat & Comp Phys |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Nanowire Bioengineering Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Crystal symbols.namesake General Materials Science Thin film business.industry Physics Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Chemistry Semiconductor Nanocrystal Chemical physics symbols Nanorod Self-assembly van der Waals force 0210 nano-technology business Engineering sciences. Technology |
| Zdroj: | Nano letters Nano Letters, 13(6), 2317. American Chemical Society |
| ISSN: | 1530-6984 |
| Popis: | Oriented attachment, the process in which nanometer-sized crystals fuse by atomic bonding of specific crystal facets, is expected to be more difficult to control than nanocrystal self-assembly that is driven by entropic factors or weak van der Waals attractions. Here, we present a study of oriented attachment of PbSe nanocrystals that counteract this tuition. The reaction was studied in a thin film of the suspension casted on an immiscible liquid at a given temperature. We report that attachment can be controlled such that it occurs with one type of facets exclusively. By control of the temperature and particle concentration we obtain one- or two-dimensional PbSe single crystals, the latter with a honeycomb or square superimposed periodicity in the nanometer range. We demonstrate the ability to convert these PbSe superstructures into other semiconductor compounds with the preservation of crystallinity and geometry. |
| Databáze: | OpenAIRE |
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