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From Stems (and Stars) to Roses: Shape-Controlled Synthesis of Zinc Oxide Crystals
- Source :
- Crystal Growth & Design. 9:3432-3437
- Publication Year :
- 2009
- Publisher :
- American Chemical Society (ACS), 2009.
-
Abstract
- A novel, scalable, solution-based method suitable for the control of ZnO crystal morphology at moderate temperature from rods/stars to rose-shaped, flowerlike structures is presented here. The synthesized ZnO roselike crystals are composed by wide nanosheets folded several times on themselves. This study represents the first step toward the full understanding of the growth mechanism that led to the formation of such a structure. It is now widely acknowledged that both size and shape of the metal oxide crystals have a profound effect on their properties. The influence that two morphology directing agents, ammonia and citric acid trisodium salt dihydrate, have on the shape-controlled synthesis is illustrated. The analysis of various possible mechanisms and forces that might contribute to the roselike crystals formation, such as the influence of polar surfaces, is discussed. The chemical composition and work function of the ZnO roses is investigated via XPS and UPS. XRD analysis suggests wurtzite as the most...
- Subjects :
- business.industry
Oxide
chemistry.chemical_element
General Chemistry
Crystal structure
Zinc
Condensed Matter Physics
chemistry.chemical_compound
Optics
X-ray photoelectron spectroscopy
Chemical engineering
chemistry
General Materials Science
Light emission
Hydrate
business
Nanosheet
Wurtzite crystal structure
Subjects
Details
- ISSN :
- 15287505 and 15287483
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Crystal Growth & Design
- Accession number :
- edsair.doi...........d52cf85428df8c93658ca96be1657031