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Particle sizing in dense suspensions with multiwavelength photon migration measurements
Author(s) -
Dali Sarabjyot Singh,
Rasmussen John C.,
Huang Yingqing,
Roy Ranadhir,
SevickMuraca Eva M.
Publication year - 2005
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.10370
Subject(s) - volume fraction , scattering , isotropy , dynamic light scattering , light scattering , materials science , particle (ecology) , wavelength , particle size , particle size distribution , optics , sizing , volume (thermodynamics) , range (aeronautics) , molecular physics , physics , chemistry , thermodynamics , nanoparticle , nanotechnology , composite material , oceanography , organic chemistry , geology
Characterization of dense polydisperse suspensions, with mean diameters 143 and 226 nm and volume fractions ranging from 0.03 to 0.27, was conducted using time‐dependent measurements of multiply scattered light. Frequency‐domain photon migration measurements of isotropic scattering coefficients at wavelengths between 488 and 828 nm were found to agree with those predicted from the Mie theory and the polydisperse hard‐sphere Percus–Yevick model. The wavelength‐dependent isotropic scattering data were then used to successfully recover the particle size distribution and volume fraction of the suspensions, by minimizing a nonlinear least‐squares problem. The mean particle size and volume fractions were recovered within an error range of 0–15.53 and 0–24%, respectively, compared with dynamic light scattering results and experimentally measured volume fractions. © 2005 American Institute of Chemical Engineers AIChE J, 2005