Dynamic Light Scattering
Dynamic Light Scattering (DLS) is an important tool for characterizing nanoparticles and other colloidal solutions. DLS measures fractional changes in the scattering intensity of a solution as a function of time. Because these fractional changes occur as nanoparticles move through the solution, the timescale over which these changes occur depends upon the rate at which the nanoparticles diffuse. The hydrodynamic diameter (the diameter of a hypothetical nonporous sphere that diffuses at the same rate as the particles being characterized) can be calculated from the time dependence of the scattering intensity measurements. The hydrodynamic diameter is an important complement to other sizing measurements such as TEM because it provides information about how particles behave in solution. Stable colloidal solutions will have particles with hydrodynamic diameters similar to or slightly larger than their TEM size, although the diameter can increase if polymers or biomolecules are attached to the particle surface.
At nanoComposix, DLS measurements are performed on a Malvern Zetasizer Nano-ZS equipped with a HeNe laser at 632.8 nm and a scattering detector at 173 degrees.
How to order
- Fill out the Sample Submission Form and Email to This e-mail address is being protected from spambots. You need JavaScript enabled to view it
- Add DLS Serivce to Cart and Check Out.
- Package and send DLS samples with the printed Sample Submission Form. Sample preparation and shipping instructions are here.