Dynamic Light Scattering (DLS)

Model:  Malvern ZEN 3600 Zetasizer

Location: 014 Brauer Hall

Description: DLS sometimes referred to as Quasi Elastic Light Scattering (QELS), is a non-invasive, well-established technique for measuring the size, size distribution and zeta potential of molecules and particles typically in the submicron region.

Capabilities:

• Accurate, reliable, and repeatable particle size analysis in one or two minutes.
• Multi-angle Dynamic Light Scattering (MADLS®) improves the resolution of DLS and provides angular independent size results.
• Simple, material-independent measurement of per peak particle concentration.
• Mean size only requires knowledge of the viscosity of the liquid.
• Size measurement of sizes from <5nm to >10um
• Size measurement of molecules from MW < 1000Da.
• Low volume requirement (as little as 40µL).

Typical uses:

• Characterization of particles, emulsions, or molecules, which have been dispersed or dissolved in a liquid such as proteins, polymers, micelles, carbohydrates, nanoparticles, colloidal dispersions, emulsions, biological cells, gels, and ions.
• A stability study by measurements of a sample can show whether the particles aggregate over time by seeing whether the hydrodynamic radius of the particle increases.

Fees

Per hour rate	Trained user	By our service
WUSTL	$12	$72
Other universities	N/A	$80
Industry Corporate	N/A	$160