Titania single crystals with a curved surface
| Autor: | Hua Gui Yang, Shuang Yang, Huijun Zhao, Long Wu, Yu Hang Li, Porun Liu, Xue-Qing Gong, Bing Xing Yang, Yan Yan Yu |
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| Rok vydání: | 2014 |
| Předmět: |
Surface (mathematics)
Miller index Multidisciplinary Morphology (linguistics) Materials science General Physics and Astronomy Nanotechnology Crystal growth General Chemistry Curvature General Biochemistry Genetics and Molecular Biology law.invention Crystal law Chemical physics Crystallization Facet |
| Zdroj: | Nature Communications. 5 |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/ncomms6355 |
| Popis: | Owing to its scientific and technological importance, crystallization as a ubiquitous phenomenon has been widely studied over centuries. Well-developed single crystals are generally enclosed by regular flat facets spontaneously to form polyhedral morphologies because of the well-known self-confinement principle for crystal growth. However, in nature, complex single crystalline calcitic skeleton of biological organisms generally has a curved external surface formed by specific interactions between organic moieties and biocompatible minerals. Here we show a new class of crystal surface of TiO₂, which is enclosed by quasi continuous high-index microfacets and thus has a unique truncated biconic morphology. Such single crystals may open a new direction for crystal growth study since, in principle, crystal growth rates of all facets between two normal {101} and {011} crystal surfaces are almost identical. In other words, the facet with continuous Miller index can exist because of the continuous curvature on the crystal surface. |
| Databáze: | OpenAIRE |
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