Influence of Mie scattering on nanoparticles with different particle sizes and shapes: Photometry and analytical ultracentrifugation with absorption optics
Author(s) -
M. D. Lechner
Publication year - 2005
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0503361l
Subject(s) - mie scattering , photometry (optics) , analytical ultracentrifugation , light scattering , extinction (optical mineralogy) , optics , nanoparticle , scattering , absorption (acoustics) , particle (ecology) , materials science , spheres , wavelength , molecular physics , analytical chemistry (journal) , physics , chemistry , nanotechnology , ultracentrifuge , chromatography , astrophysics , stars , oceanography , astronomy , geology
Nanoparticles are used in large quantities for very different applications. A precise determination of the diameter and the particle size distribution which is re- sponsible for the application properties is therefore essential. Reliable methods for measuring the above mentioned quantities are photometric measurements and ana- lytical ultracentrifugation with an UV optics detector. Both methods are ruled by the Mie effect, that is scattering and absorption of the particles as function of the diame- ter, the wavelength, and the shape of the particles. The extinction coefficients = c for spheres, rods, and core shell particles have been calculated and plotted over a wide range of the size parameter d/. Two examples for multimodal latex particles and core shell particles have been given and demonstrate the applicability of the method.
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