Dynamic Light Scattering (DLS) is a physical technique employed to determine the size distribution of particles in solutions and suspensions by analyzing their Brownian motion. This method involves irradiating particles ranging from a few nanometers to a few microns with visible light at a wavelength of 633 nm. The intensity of light scattered by the particles is then measured over time. The actual size of the particles is calculated based on the average hydrodynamic diameter (Z-Average) and polydispersity index (PDI) of the sample.

Our Zetasizer Nano ZSP System is equipped with a 633 nm laser and utilizes disposable polystyrene cuvettes for accurate particle size distribution measurements. It is capable of determining the particle size within the range of 0.3 nm to 10 micrometers.

Fatemeh Yazdi Samadi (MSc in Medical Engineering), Core Facility-DLS Analysis; Email: f.yazdi @avicenna.ac.ir; Contact Number: +98 (21) 22432020 – Ext. 106, Fax: +98 (21) 22432021

Zetasizer Nano ZSP System can be accessible at Nanobiotechnology Laboratory situated on the ground floor of Avicenna Research Institute, located within Shahid Beheshti University.

The laboratory operates from Saturday to Wednesday, between 8:00 AM and 4:00 PM.

Service Policy and Costs:

The cost of tests or services will vary depending on the sample type and specific testing requirements. Therefore, upon the initial inquiry, the laboratory will provide information regarding the cost of the requested test.

To ensure smooth processing, please coordinate with the laboratory senior assistant at least 48 hours before sending the sample plus the DLS customer form completed and signed by the supervisor.