Fractal geometry of carbonaceous aggregates from an urban aerosol

K. A. Katrinak, Peter Rez, P. R. Perkes, P R Buseck

Research output: Chapter in Book/Report/Conference proceedingChapter

117 Scopus citations


The 38 aggregates analyzed, ranging in length from 0.21 to 2.61 μm were divided into three groups: fractal (D<2), possibly nonfractal (D≥2), and mixed geometry. For the 23 fractal aggregates, fractal dimensions (D) range from 1.35 to 1.89 and are interpretable using cluster-cluster and particle-cluster models, which are variations of diffusion-limited aggregation. The 23 aggregates with D≥2 were divided into two categories: uncoated and coated. The uncoated aggregates have branching shapes and may have formed through particle-cluster aggregation. The coated aggregates have an underlying morphology which may be fractal; the coatings were probably deposited from the ambient atmosphere. The two mixed aggregates have interiors with D≥2 surrounded by outer regions with D<2. -from Authors

Original languageEnglish (US)
Title of host publicationEnvironmental Science & Technology
Number of pages9
StatePublished - 1993

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)
  • Environmental Chemistry
  • Environmental Engineering


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