title: Universal occurrence of soot superaggregates with a fractal dimension of 2.6 in heavily sooting laminar diffusion flames.
abstract: Using small-angle light scattering we show that a new phase of soot with size ca. 10 microm and a fractal dimension of D approximately equal to 2.6 exists in laminar diffusion flames for a wide range of heavily sooting fuels. This new phase appears to be a supramicrometer extension of the well-known submicrometer, D approximately equal to 1.8 phase of soot formed via diffusion-limited cluster aggregation (DLCA). The occurrence of this new soot phase correlates with an empirical sooting index for fuels. This supports a creation scenario in which these supramicrometer aggregates are created via a percolation of the submicrometer, D approximately equal to 1.8 aggregates.
authors.affiliation: Department of Physics, Kansas State University, Manhattan, Kansas 66506-2601, USA.
authors.forename: W
authors.initials: W
authors.lastname: Kim
authors.forename: C M
authors.initials: CM
authors.lastname: Sorensen
authors.forename: A
authors.initials: A
authors.lastname: Chakrabarti