Separation of coherent and incoherent scattering contributions in ellipsometric light scattering experiments on latex mixtures
- Erbe, Andreas Max Planck Institute of Colloids and Interfaces, Potsdam-Golm, Germany - Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
- Tauer, Klaus Max Planck Institute of Colloids and Interfaces, Potsdam-Golm, Germany
- Sigel, Reinhard Max Planck Institute of Colloids and Interfaces, Potsdam-Golm, Germany - Adolphe Merkle Institute, University of Fribourg, Switzerland
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04.02.2009
Published in:
- Langmuir. - 2009, vol. 25, no. 5, p. 2703–2710
English
Mixtures of poly(styrene) latices were used to vary the sample polydispersity for an investigation of polydispersity effects on ellipsometric light scattering (ELS) data. A procedure for high-accuracy ELS measurements is presented and the experimental distinction of coherent and incoherent scattering contributions is demonstrated. The ellipsometric parameters tan(ΨQ) and Δ are solely determined from coherent scattering and represent averaged ensemble properties, independent of the width of the size distribution. The change in polydispersity shows up in the parameter tan(ΨI), which is affected by incoherent contributions. The average particle size detected by ELS can be estimated from the intensity-weighted size distribution. A radial local birefringence in the particles has been detected and attributed to stress birefringence due to the action of the interface tension on the particles during their growth.
- Faculty
- Faculté des sciences et de médecine
- Department
- AMI - Soft Nanoscience
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 13251
- DOI 10.1021/la803500p
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301363
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