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, emulsion, biological cell, gels and ions.
• 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
Other departments at WUSTL	$10	$70
Other universities	$20	$80
Industry Corporate	$40	$160