| Autor: |
Espinal AE; Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3136, USA., Zhang L, Chen CH, Morey A, Nie Y, Espinal L, Wells BO, Joesten R, Aindow M, Suib SL |
| Jazyk: |
angličtina |
| Zdroj: |
Nature materials [Nat Mater] 2010 Jan; Vol. 9 (1), pp. 54-9. Date of Electronic Publication: 2009 Nov 01. |
| DOI: |
10.1038/nmat2567 |
| Abstrakt: |
Cryptomelane-type manganese oxide (OMS-2) has been widely used to explore the semiconducting and catalytic properties of molecular sieves with mixed-valent frameworks. Selective synthesis of patterned thin films of OMS-2 with hierarchical nanostructures and oriented crystals is challenging owing to difficulties in preserving the mixed valence, porosity and crystalline phase. Here, we report that pulsed-laser ablation of OMS-2 in an oxygen-rich medium produces a three-dimensional nanostructured array of parallel and inclined OMS-2 fibres on bare substrates of (001) single-crystal strontium titanate. Both parallel and inclined OMS-2 fibres elongate along the [001](OMS-2) direction. The parallel fibres interact strongly with the substrate and grow epitaxially along <110>(STO) with lattice misfits of less than 4%, whereas the inclined fibres are oriented with (301) parallel to the substrate surface. The spontaneous orientation of the crystalline OMS-2 domains over the STO surface opens up a new avenue in lattice-engineered synthesis of multilayer materials. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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