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Article: Influence of nonuniform kinetics on particle aggregation

TitleInfluence of nonuniform kinetics on particle aggregation
Authors
KeywordsArticle
Chemical Reaction Kinetics
Crystal Structure
Density
Diffusion
Materials
Molecular Interaction
Monte Carlo Method
Particle Size
Simulation
Stochastic Model
Structure Analysis
Synthesis
Issue Date2002
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/iecr
Citation
Industrial and Engineering Chemistry Research, 2002, v. 41 n. 5, p. 1189-1194 How to Cite?
AbstractMany pathways for the synthesis of novel materials involve aggregation processes that occur in the presence of diffusion barriers and spatially nonuniform kinetics (i.e., the ratio of the timescales of diffusion and reaction depends on the cluster size). In this study, we simulate clusters that grow by diffusion and spatially nonhomogeneous kinetics on two-dimensional square lattices. The influence of nonuniform kinetics on the fractal dimension, particle density distribution, and average diffusion path length is investigated. It is found that if the simulations are performed for a sufficiently long time, the fractal dimension and packing density are not significantly influenced. Specifically, the decrease in the fractal dimension and the increase in the packing density as compared to their values inthe case of diffusion-limited aggregation are relatively small. However, the effective diffusion path length prior to attachment is significantly enhanced, especially for smaller cluster sizes. The implications of these observations for particle aggregation processes are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/90782
ISSN
2015 Impact Factor: 2.567
2015 SCImago Journal Rankings: 0.976
References

 

DC FieldValueLanguage
dc.contributor.authorLin, Ben_HK
dc.contributor.authorSureshkumar, Ren_HK
dc.contributor.authorKardos, JLen_HK
dc.date.accessioned2010-09-17T10:08:18Z-
dc.date.available2010-09-17T10:08:18Z-
dc.date.issued2002en_HK
dc.identifier.citationIndustrial and Engineering Chemistry Research, 2002, v. 41 n. 5, p. 1189-1194en_HK
dc.identifier.issn0888-5885en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90782-
dc.description.abstractMany pathways for the synthesis of novel materials involve aggregation processes that occur in the presence of diffusion barriers and spatially nonuniform kinetics (i.e., the ratio of the timescales of diffusion and reaction depends on the cluster size). In this study, we simulate clusters that grow by diffusion and spatially nonhomogeneous kinetics on two-dimensional square lattices. The influence of nonuniform kinetics on the fractal dimension, particle density distribution, and average diffusion path length is investigated. It is found that if the simulations are performed for a sufficiently long time, the fractal dimension and packing density are not significantly influenced. Specifically, the decrease in the fractal dimension and the increase in the packing density as compared to their values inthe case of diffusion-limited aggregation are relatively small. However, the effective diffusion path length prior to attachment is significantly enhanced, especially for smaller cluster sizes. The implications of these observations for particle aggregation processes are discussed.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/iecren_HK
dc.relation.ispartofIndustrial and Engineering Chemistry Researchen_HK
dc.subjectArticleen_HK
dc.subjectChemical Reaction Kineticsen_HK
dc.subjectCrystal Structureen_HK
dc.subjectDensityen_HK
dc.subjectDiffusionen_HK
dc.subjectMaterialsen_HK
dc.subjectMolecular Interactionen_HK
dc.subjectMonte Carlo Methoden_HK
dc.subjectParticle Sizeen_HK
dc.subjectSimulationen_HK
dc.subjectStochastic Modelen_HK
dc.subjectStructure Analysisen_HK
dc.subjectSynthesisen_HK
dc.titleInfluence of nonuniform kinetics on particle aggregationen_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0037028959en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037028959&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume41en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1189en_HK
dc.identifier.epage1194en_HK

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