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Optical effects in stratified colloidal particles near transparency
Author(s) -
AlexanderKatz Roberto,
De La Rosa Aída,
Rojas Fernando,
Contreras Claudia,
Cardoso Judith
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940840126
Subject(s) - isotropy , scattering , light scattering , transparency (behavior) , colloid , optics , particle (ecology) , materials science , core (optical fiber) , particle size , particle size distribution , molecular physics , chemical physics , condensed matter physics , physics , chemistry , oceanography , political science , law , geology
Non‐isotropic scattering patterns showing a minimum for small and almost transparent core‐shell particles are discussed. It is shown that for any particle size, close to transparency, a core‐shell particle behaves optically differently from a non‐structured particle due to the presence of a minimum in the scattering pattern. Transparency criteria are discussed in the light of the non‐isotropic character of the scattered light. Direct experimental evidence of the existence of this minimum is presented and compared with the theoretical predictions of the scattering by colloids having a distribution of particle composition.