Sizing of colloidal particles with light scattering: corrections for beginning multiple scattering.

Area of Science:

• Materials Science
• Physical Chemistry
• Nanotechnology

Background:

• Static light scattering (SLS) is a standard technique for particle sizing (50 nm to micrometers).
• Traditional SLS requires highly transparent samples (>95% transmittance) to avoid multiple scattering.
• Less translucent samples pose challenges for accurate particle-size distribution determination.

Purpose of the Study:

• To develop and validate a method for particle sizing in less translucent samples using static light scattering.
• To adapt existing multiple scattering approximations for improved accuracy in SLS analysis.
• To extend the applicability of SLS to a wider range of sample transparencies.

Main Methods:

• Applied a computationally efficient first-order approximation for multiple scattering.
• Integrated Hartel's approach into the initial steps of the approximation.
• Incorporated the approximation into an inversion technique for particle-size distribution retrieval.

Main Results:

• The developed method successfully retrieves particle-size distributions for samples with transmittances down to 30%.
• The first-order approximation provides a computationally convenient and effective correction for multiple scattering effects.
• Demonstrated successful application of the technique to experimental data.

Conclusions:

• The enhanced static light scattering method broadens the scope of particle-size analysis to less transparent media.
• The computationally convenient approximation offers a practical solution for handling multiple scattering in SLS.
• This advancement facilitates more accurate particle characterization in diverse scientific and industrial applications.