Dynamic Light Scattering Application Notes

Microtrac Dynamic Light Scattering Application Notes

Combined Use of Dynamic Light Scattering, Laser Diffraction, Imaging and Zeta Potential for Characterization of Nanoparticles with Special Emphasis on Inks — There are several processing steps in the manufacture of ink each of which can impact the quality and are intimate with particle characteristics. One or more analysis types may be necessary for process control, quality control or R&D development.

How to use viscosity in the DLS formula — Brownian motion is an effect that develops as a result of fluid molecules colliding with particles and causing their movement.  According to the Stoke-Einstein formula shown below, the particles are treated as point objects have no mass or density.  The movement of particles gives rise to diffusion through the suspension where the rate of diffusion is more rapid for small particles…

Particle size analysis of high concentration liposomes and micelle suspensions using Dynamic Light Scattering— Measuring particle size is vital to studying the growth of multi-lamellar structures, liposome agglomeration, membrane disruption, and microbiological contamination.  This application note explains how Microtrac’s enhanced Dynamic Light Scattering technology enables users to accurately measure these particles at higher concentrations, which reduces misinterpreted data from over dilution.

High concentration sub micron particle size distribution by DLS— Dynamic Light Scattering is a well-established technique for measuring particle size over the size range of a few nanometers to a few microns; however, at high sample concentrations severe limitations are placed on the DLS measurement.  This paper discusses the causes of the high concentration limitations, the means of overcoming the limitations, and the results of measurements at high concentrations.

Measurement of low concentration small sized particulate systems — This note describes the limits of detectability of particles in general below 6.5 microns…

Nanoparticle Sizing: Dynamic Light Scattering analysis in the Frequency Spectrum Mode— Dynamic Light Scattering analysis is the basis of a common particle sizing measurement covering the range of nanometers to microns. At the nanometer end of the range, measurements becomes progressively more difficult as the particle optical scattering coefficients drop sharply, reducing the scattered light intensity…

Nanoparticle size measurements of printer ink using Dynamic Light Scattering — Microtrac Dynamic Light Scattering analyzers can measure inks of all colors including black, magenta, yellow, and blue.  Precise and sensitive particle size measurements can be conducted using high concentrations thanks to Microtrac’s enhanced Dynamic Light Scattering technology.  High concentration measurements and the ability to clearly resolve multi modes are possible because of the amplified optical signal generated by proprietary design elements.

UPA verses PCS multi-modal measurement— The comparison of instruments with the use of multimode samples determines performance criteria of mode resolution, mode size accuracy, and mode concentration accuracy.  The performance of the UPA and Photon Correlation Spectroscopy (PCS) was compared using…

Using Nanotrac to identify gushing in beer Beer is world’s oldest alcoholic beverage and rivals water and tea as the most popular drink. The brewing requires the fermentation of starch of which the primary source is barley while other sources such as wheat and rice may be used. Usually hops are added to modify bitterness flavor and retard spoilage. Alcohol by volume ranges from less than 1% to as much as 20% depending upon regional, cultural and legal desires…


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