Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions

Polymeric emulsions are well characterized by the knowledge of their particle size distributions (PSD). Elastic-light-scattering (ELS) measurements can be inverted to estimate the PSD in the range from 50 nm up to several micrometers. The relative refractive index of the particles is required in com...

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Detalles Bibliográficos
Autores principales:	Frontini, G.L., Fernández Berdaguer, E.M.
Formato:	JOUR
Materias:	Elastic light scattering Generalized cross validation Tikhonov regularization Computer simulation Emulsions Light absorption Light measurement Light scattering Optimization Parameter estimation Particle size analysis Polymers Refractive index Generalized cross validation technique Polymeric emulsions Inverse problems
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_10682767_v11_n4_p329_Frontini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_10682767_v11_n4_p329_Frontini
record_format	dspace
spelling	todo:paper_10682767_v11_n4_p329_Frontini2023-10-03T16:02:13Z Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions Frontini, G.L. Fernández Berdaguer, E.M. Elastic light scattering Generalized cross validation Tikhonov regularization Computer simulation Emulsions Light absorption Light measurement Light scattering Optimization Parameter estimation Particle size analysis Polymers Refractive index Elastic light scattering Generalized cross validation technique Polymeric emulsions Tikhonov regularization Inverse problems Polymeric emulsions are well characterized by the knowledge of their particle size distributions (PSD). Elastic-light-scattering (ELS) measurements can be inverted to estimate the PSD in the range from 50 nm up to several micrometers. The relative refractive index of the particles is required in computation procedures to obtain the PSD. Small differences in the assumed refractive index may cause significant differences in the resulting PSD. From the scattering data, the refractive index can be determined. In this article we present the corresponding technique. We consider polymeric emulsions where the nonabsorption assumption is reasonable. We propose a methodology based on Tikhonov regularization applied only to the distribution. However, we solve the minimization problem simultaneously with respect to the distribution and the refractive index. To select the regularization parameter, we include the Generalized Cross Validation (GCV) technique. From simulated ELS measurements we show that the problem is solved successfully. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10682767_v11_n4_p329_Frontini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Elastic light scattering Generalized cross validation Tikhonov regularization Computer simulation Emulsions Light absorption Light measurement Light scattering Optimization Parameter estimation Particle size analysis Polymers Refractive index Elastic light scattering Generalized cross validation technique Polymeric emulsions Tikhonov regularization Inverse problems
spellingShingle	Elastic light scattering Generalized cross validation Tikhonov regularization Computer simulation Emulsions Light absorption Light measurement Light scattering Optimization Parameter estimation Particle size analysis Polymers Refractive index Elastic light scattering Generalized cross validation technique Polymeric emulsions Tikhonov regularization Inverse problems Frontini, G.L. Fernández Berdaguer, E.M. Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
topic_facet	Elastic light scattering Generalized cross validation Tikhonov regularization Computer simulation Emulsions Light absorption Light measurement Light scattering Optimization Parameter estimation Particle size analysis Polymers Refractive index Elastic light scattering Generalized cross validation technique Polymeric emulsions Tikhonov regularization Inverse problems
description	Polymeric emulsions are well characterized by the knowledge of their particle size distributions (PSD). Elastic-light-scattering (ELS) measurements can be inverted to estimate the PSD in the range from 50 nm up to several micrometers. The relative refractive index of the particles is required in computation procedures to obtain the PSD. Small differences in the assumed refractive index may cause significant differences in the resulting PSD. From the scattering data, the refractive index can be determined. In this article we present the corresponding technique. We consider polymeric emulsions where the nonabsorption assumption is reasonable. We propose a methodology based on Tikhonov regularization applied only to the distribution. However, we solve the minimization problem simultaneously with respect to the distribution and the refractive index. To select the regularization parameter, we include the Generalized Cross Validation (GCV) technique. From simulated ELS measurements we show that the problem is solved successfully.
format	JOUR
author	Frontini, G.L. Fernández Berdaguer, E.M.
author_facet	Frontini, G.L. Fernández Berdaguer, E.M.
author_sort	Frontini, G.L.
title	Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
title_short	Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
title_full	Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
title_fullStr	Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
title_full_unstemmed	Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
title_sort	inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions
url	http://hdl.handle.net/20.500.12110/paper_10682767_v11_n4_p329_Frontini
work_keys_str_mv	AT frontinigl inversionofelasticlightscatteringmeasurementstodeterminerefractiveindexandparticlesizedistributionofpolymericemulsions AT fernandezberdaguerem inversionofelasticlightscatteringmeasurementstodeterminerefractiveindexandparticlesizedistributionofpolymericemulsions
_version_	1807318833700012032

Inversion of elastic light scattering measurements to determine refractive index and particle size distribution of polymeric emulsions

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