Document Detail

Estimation of complex refractive index of polydisperse particulate systems from multiple-scattered ultraviolet-visible-near-infrared measurements.
MedLine Citation:
PMID:  17538669     Owner:  NLM     Status:  MEDLINE    
A method to extract the complex refractive index of spherical particles from a polydisperse suspension at concentrations where multiple light-scattering effects are significant is presented. The optical constants are estimated from total diffuse reflectance and transmittance measurements and inverting the measurements using the radiative transfer equation (RTE) and the Mie theory for scattering by polydisperse spherical particles. The method is tested by applying it to three different polydisperse polystyrene suspensions and extracting the optical constants of polystyrene particles in the wavelength range of 450-1200 nm. The effect of particle size, concentration, and polydispersity on the estimated values of the optical constants is also discussed.
M A Velazco-Roa; S N Thennadil
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Applied optics     Volume:  46     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  2007 Jun 
Date Detail:
Created Date:  2007-05-31     Completed Date:  2007-07-24     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3730-5     Citation Subset:  IM    
School of Chemical Engineering and Advanced Materials, University of Newcastle upon Tyne, Newcastle upon Tyne, UK.
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MeSH Terms
Models, Statistical
Optics and Photonics*
Polystyrenes / chemistry*
Reproducibility of Results
Scattering, Radiation
Spectrophotometry, Ultraviolet
Spectroscopy, Near-Infrared / methods
Reg. No./Substance:

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