Analysis of Growth Spirals on Vapor-Grown Metal-free β-Phthalocyanine Crystals
| Autor: | W.J.P. van Enckevort, G. Deroover, N. Panina, Elias Vlieg, Hugo Meekes |
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| Rok vydání: | 2009 |
| Předmět: |
Chemistry
business.industry Monte Carlo method Solid State Chemistry General Chemistry Condensed Matter Physics Molecular physics Ideal gas law.invention chemistry.chemical_compound Optics law Phthalocyanine General Materials Science Kinetic Monte Carlo Crystallization Diffusion (business) Anisotropy business Spiral |
| Zdroj: | Crystal Growth & Design, 9, 2409-2414 Crystal Growth & Design, 9, 5, pp. 2409-2414 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg801306j |
| Popis: | The extremely elongated growth spirals observed using atomic force microscopy on the largest {101} faces of the needle crystals of vapor-grown metal-free β-phthalocyanine are analyzed. An analytical model for the growth of anisotropic rectangular spirals is proposed to relate step distances and the step energies to the driving force for crystallization. The model is confronted with the experimental results, with kinetic Monte Carlo simulations, and with a growth step analysis. The model is well able to describe the observed and simulated spiral shapes. In addition, the experimental driving force for crystallization could be estimated and turns out to be reduced considerably as a result of diffusion limitation when compared to the value obtained for ideal gas behavior. |
| Databáze: | OpenAIRE |
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