MORPHOLOGY DEVELOPMENT AND CRYSTAL GROWTH IN NANOCRYSTALLINE AGGREGATES UNDER HYDROTHERMAL CONDITIONS: INSIGHTS FROM TITANIA - SIMULATIONS AND EXPERIMENTS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Penn R.L. | |
dc.contributor.author | Banfield J.F. | |
dc.date.accessioned | 2021-01-17T00:09:20Z | |
dc.date.available | 2021-01-17T00:09:20Z | |
dc.date.issued | 1999 | |
dc.identifier | https://elibrary.ru/item.asp?id=157038 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1999, 63, 10, 1549-1557 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/23267 | |
dc.description.abstract | High-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) peak broadening (Scherer) analysis were used to study coarsening and morphology development of nanocrystals. Experimental work used synthetic, equidimensional anatase (TiO2) particles about 5 nm in diameter. Under hydrothermal conditions (100-250°C, 15-40 bars), rapid growth occurs along [001], driven in part by the relatively high surface energy of (001) and in part by a kinetic effect involving a cyclic generation of highly reactive adsorption sites. Rapid growth along [001] depresses the <101> growth rate until (001) surfaces shrink to a critical cluster size. A second major coarsening mechanism significantly reduces the surface energy, especially under acidic conditions. This mechanism involves topotactic attachment of primary particles at high energy surfaces (most commonly {112}, less commonly (001)) and can result in elongate single crystals. Oriented attachment may be an important coarsening mechanism under a wide range of conditions encountered in the laboratory and in natural environments. | |
dc.title | MORPHOLOGY DEVELOPMENT AND CRYSTAL GROWTH IN NANOCRYSTALLINE AGGREGATES UNDER HYDROTHERMAL CONDITIONS: INSIGHTS FROM TITANIA - SIMULATIONS AND EXPERIMENTS | |
dc.type | Статья |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru