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Dynamic light scattering (DLS), sometimes referred to as Quasi-Elastic Light Scattering (QELS), is a non-invasive, well-established technique for measuring the size and size distribution of molecules and particles typically in the submicron region, and with the latest technology lower than 1nm.
Typical applications of dynamic light scattering are the characterization of particles, emulsions or molecules, which have been dispersed or dissolved in a liquid. The Brownian motion of particles or molecules in suspension causes laser light to be scattered at different intensities. Analysis of these intensity fluctuations yields the velocity of the Brownian motion and hence the particle size using the Stokes-Einstein relationship.
Dynamic light scattering technology from Malvern Instruments offers the following advantages:
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This note discusses how DLS-based optical microrheology can be used to determine the rheological behavior of polymer solutions and the impact of tracer particle chemistry on the measured microrheological response.
This presentation discusses the importance of particle size, zeta potential and rheology for a functional suspension, and demonstrates how these properties can be manipulated to induce dispersion stability.
The stability of a protein sample and its tendency to aggregate is explored using a combination of SEC-MALS and DLS
We demonstrate the surface zeta potential measurement of pig skin, a human skin analogue used in medicine, pharmaceutical and cosmetic development and cellulose filter paper, used primarily for sterile filtration
In this work we demonstrate latex measurements up to 4M KCL using the Diffusion Barrier Technique, thereby demonstrating sample-limited, rather than instrument-limited characterization of high conductivity samples.
(Webinar - Recorded)
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