Kerr effect from fractal aggregates of polystyrene microspheres

Daniela Asnaghi, Marzio Giglio, Francesco Mantegazza, Mario Ettore Giardini, Vittorio Degiorgio

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We study the slow aggregation of aqueous suspensions of optically isotropic microspheres by means of transient electric birefringence. Aggregating clusters exhibit large Kerr constants, and consequently we provide direct experimental evidence that the clusters do posses form anisotropy. From the birefringence relaxation time we derive information on the average cluster size and on the size distribution, and determine their evolution during the aggregation process. Static and dynamic light scattering data confirm the validity of the transient electric birefringence results.
Original languageEnglish
Pages (from-to)1237-1241
Number of pages5
JournalNuovo Cimento D
Issue number8
Publication statusPublished - 1994


  • fractal aggregates
  • polystyrene microspheres
  • Kerr effect


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