Analysis of particle size / zeta potential (electrophoretic mobility)

We offer measurements using equipment Zetasizer Nano ZS (Malvern) – a multifunctional particle size/molecular weight/zeta potential analyzer for measuring colloidal dispersions (nanoparticles and microparticles, proteins, polymers, etc.) and films (surface zeta potential).


We offer:

  • measurement of hydrodynamic diameter/molecular mass of particles in solutions (macromolecules, nanoparticles, microparticles) by dynamic light scattering (DLS) technique in the range of 1 nm – 5 µm;
  • studies of colloidal stability, dispersion; analysis of aggregation processes in multi-angle detection mode;
  • measurement of surface charge ( zeta potential) of dispersions (also in
    concentrated samples up to 40% v/v) and macroscopic planar films with
    dimensions of about 4 x 5 mm (polymers, composite mats, etc.).


Tests are possible in aqueous solutions and organic solvents, in samples from 50 µL (hydrodynamic diameter) or 800 µL (zeta potential) in the temperature range from 0 to 90 oC. It is available to provide consumable accessories for measurement and sample preparation (syringe filters, disposable cuvettes, cells and tables for zeta potential measurement). In the case of sensitive samples, it is possible to prepare them on site, directly before the measurement (available, among others, high-speed centrifuges, vortexes, ultrasonic bath).

Keywords: sting, digital modeling, simulation, software DLS, microemulsions, nanoparticles, nanomaterials, nanogels, liposomes, hydrodynamic diameter, zeta potential

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