Three-dimensional dynamic light scattering

Overbeck, Ekkehard; Sinn, Christian

doi:10.1080/09500349908231273

Cited by 41 publications

(14 citation statements)

References 22 publications

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“…We decorrelate multiple scattering contributions by taking advantage of a novel DLS experiment introduced recently [12], and perform a careful statistical data analysis. We shall show that the data we obtain exhibit qualitatively as well as quantitatively the effect discussed above.…”

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confidence: 99%

Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions

1999

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Theoretical calculations for colloidal charge-stabilized suspensions and hard sphere suspensions show that hydrodynamic interactions yield a qualitatively different particle concentration dependence of the short-time self-diffusion coefficient. The effect, however, is numerically small and hardly accessible by conventional light scattering experiments.Applying multiple-scattering decorrelation equipment and a careful data analysis we show that the theoretical prediction for charged particles is in agreement with our experimental results from aqueous polystyrene latex suspensions.

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Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions

1999

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“…The amount of multiply scattered light decreases with decreasing thickness of the cuvette. A cuvette thickness of 1 mm has been applied successfully [8,14]. Figure 2 to Figure 5 show the DLS results for the particles under study.…”

Section: Decorrelation Of Multiple Scatteringmentioning

confidence: 99%

“…A detailed discussion of this effect can be found in Ref. [8]. Whereas for the two-color experiment only standard cylindrical cuvettes with an inner diameter of not less than 10 mm can be used for optical reasons, for the 3D setup rectangular cuvettes can be employed.…”

Section: Decorrelation Of Multiple Scatteringmentioning

confidence: 99%

“…Ref. [4]), we realized in our laboratory an alternative machine called a 3D setup [8], the wavevector scheme of which is shown in Figure 1c. The two independent experiments are separated spatially, thereby eliminating any restrictions on the wavelengths used.…”

Section: Decorrelation Of Multiple Scatteringmentioning

confidence: 99%

“…The theoretical principles of multiple scattering decorrelation have been described in detail by Scha Ètzel [4]. Details of different experimental setups have been described elsewhere [7,8]. We therefore restrict ourselves here to explaining only schematically the``evolution'' of DLS.…”

Section: Decorrelation Of Multiple Scatteringmentioning

confidence: 99%

See 2 more Smart Citations

Particle Characterization Using Multiple Scattering Decorrelation Methods. Part 1: Standard Latex Particles

Sinn

Niehüser

Overbeck

et al. 1999

Part. Part. Syst. Charact.

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We determined the dimensions of standard polystyrene latex spheres suspended in water at different sample concentrations by dynamic light scattering and turbidimetry. Applying two different schemes for the decorrelation of multiple scattering, we show that the samples exhibit distortions of the auto-correlation function due to multiple scattering even at moderate volume fractions, which prohibits the correct determination of the particle radius. The cross-correlation functions, however, are free from these distortions. The recently deployed three-dimensional crosscorrelation setup is superior to the commercially available twocolor machine, as more turbid samples are accessible. In order to verify the results obtained by dynamic light scattering, we performed turbidity measurements with the same samples. This method is inherently free from multiple scattering contributions. We observe a systematically smaller radius in turbidimetry than in dynamic light scattering. The deviation, however, is only slightly outside the accuracy range of the measurements. We discuss possible origins for this deviation and show that our measurements are compatible with a hairy layer present on the particle's surface.

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Size Determination of Nanoparticles by Dynamic Light Scattering

Kato

2012

Nanomaterials

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Three-dimensional dynamic light scattering

Cited by 41 publications

References 22 publications

Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions

Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions

Particle Characterization Using Multiple Scattering Decorrelation Methods. Part 1: Standard Latex Particles

Size Determination of Nanoparticles by Dynamic Light Scattering

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