Dynamic Light Scattering of gold-filled polyorganosiloxane-μ-gel tracers in concentrated colloidal dispersions

1999 ◽  
Author(s):  
Wolfgang Schärtl ◽  
Christopher Roos
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Colloidal Dispersions

Two-Colour Dynamic Light Scattering Studies of Colloidal Dispersions

1998 ◽  
pp. 77-87 ◽  
Author(s):  
P. N. Pusey ◽  
P. N. Segrè ◽  
S. P. Meeker ◽  
A. Moussaïd ◽  
W. C. K. Poon
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Colloidal Dispersions

Dynamic light scattering from concentrated colloidal dispersions

1978 ◽  
Vol 59 (2) ◽  
pp. 351-355 ◽  
Author(s):  
H.M. Fijnaut ◽  
C. Pathmamanoharan ◽  
E.A. Nieuwenhuis ◽  
A. Vrij
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Colloidal Dispersions

Colloidal Dispersions of Gold Rods Characterized by Dynamic Light Scattering and Electrophoresis

Langmuir ◽  
2000 ◽  
Vol 16 (2) ◽  
pp. 459-464 ◽  
Author(s):  
Bianca M. I. van der Zande ◽  
Jan K. G. Dhont ◽  
Marcel R. Böhmer ◽  
Albert P. Philipse
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Colloidal Dispersions

scholarly journals Study of colloidal dispersions of gold nanorods using light scattering methods

2020 ◽  
Vol 23 (2) ◽  
pp. 116-126
Author(s):  
P. V. Shalaev ◽  
P. A. Monakhova ◽  
S. A. Tereshchenko
Keyword(s):  
Electron Microscopy ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Gold Nanorods ◽  
Colloidal Gold ◽  
Colloidal Dispersions ◽  
Nanoparticle Tracking Analysis ◽  
Analysis Methods ◽  
Measurement Results

Five samples of colloidal dispersions of gold nanorods with various aspect ratio were studied using methods based on light scattering. Transmission electron microscopy was used as a reference method. The advantages and disadvantages of the dynamic light scattering and nanoparticle tracking analysis methods for determination of the geometric parameters of nanoparticles, their concentration, monodispersity, as well as for detection of large aggregates and quasispherical impurities were given. It was shown that the method of depolarized dynamic light scattering can be used for determination of the geometric parameters of liquid dispersions of colloidal gold nanorods. Moreover, it was found that the presence of large impurities or particle aggregates in the sample strongly affects the measurement results. The presence of large particles in the dispersion can be determined using dynamic light scattering or nanoparticle tracking analysis methods. The method of dynamic light scattering was also found to be more sensitive to the presence of even a small amount of large impurities or aggregates in the sample. The monodispersity of a liquid dispersion of nanorods can also be estimated by dynamic light scattering and nanoparticle tracking analysis methods, and, comparing to electron microscopy, the measurement results can be considered more statistically reliable due to the analysis of a larger number of particles. It was found that the increase of spherical particles concentration in the composite dispersion of nanospheres and nanorods leads to a decrease in the contribution of the rotational mode in the total scattering intensity. In addition, the concentration of quasispherical impurities in samples of liquid dispersions of colloidal gold nanorods was calculated based on measurements of the depolarization degree of scattered light.

scholarly journals Dynamic Light Scattering of Biopharmaceutics—Can Analytical Performance Be Enhanced by Laser Power?

Pharmaceutics ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 94 ◽  
Author(s):  
Simone Aleandri ◽  
Andrea Vaccaro ◽  
Ricardo Armenta ◽  
Andreas Völker ◽  
Martin Kuentz
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Laser Power ◽  
Colloidal Dispersions ◽  
Limiting Factors ◽  
Colloidal Systems ◽  
Protein Dispersion ◽  
Model Protein ◽  
Instrument Configuration ◽  
Theoretical Considerations

Background: Dynamic light scattering (DLS) is an important tool to characterize colloidal systems and adequate sizing is particularly critical in the field of protein formulations. Among the different factors that can influence the measurement result, the effect of laser power has so far not been studied thoroughly. Methods: The sensitivity of a DLS instrument was first considered on a theoretical level, followed by experiments using DLS instruments, equipped with two different lasers of (nominal) 45 mW, and 100 mW, respectively. This work analyzes dilute colloidal dispersions of lysozyme as model protein. Results: Theoretical findings agreed with experiments in that only enhanced laser power of 100 mW laser allowed measuring a 0.1 mg/mL protein dispersion in a reliable manner. Results confirmed the usefulness of the presented theoretical considerations in improving a general understanding of the limiting factors in DLS. Conclusions: Laser power is a critical aspect regarding adequate colloidal analysis by DLS. Practical guidance is provided to help scientists specifically with measuring dilute samples to choose both an optimal instrument configuration as well as a robust experimental procedure.

Dynamic light scattering from gels in a poor solvent

1978 ◽  
Vol 39 (9) ◽  
pp. 955-960 ◽  
Author(s):  
E. Geissler ◽  
A.M. Hecht
Keyword(s):  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Poor Solvent

DYNAMIC LIGHT SCATTERING IN LC-440 NEMATIC LIQUID CRYSTAL

2014 ◽  
Vol 73 (11) ◽  
pp. 977-983
Author(s):  
A. P. Fedoryako ◽  
A. I. Kocherzhin ◽  
M. P. Kukhtin ◽  
E. I. Chernyakov
Keyword(s):  
Liquid Crystal ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Nematic Liquid Crystal
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