Spectroscopic Centre of Excellence
Malvern Nanoseries Zetasizer
Dynamic light scattering is a technique in physics, which can be used to determine the size distribution profile of small particles in solution. When light hits small particles the light scatters in all directions (Rayleigh scattering) so long as the particles are small compared to the wavelength (< 250 nm). If the light source is a laser, and thus is monochromatic and coherent, then one observes a time-dependent fluctuation in the scattering intensity. These fluctuations are due to the fact that the small molecules in solutions are undergoing Brownian motion and so the distance between the scatterers in the solution is constantly changing with time. This scattered light then undergoes either constructive or destructive interference by the surrounding particles and within this intensity fluctuation, information is contained about the time scale of movement of the scatterers.
Malvern Zetasizer Nano
Particle size - of particles and molecules from 0.6nm to 6 microns using NIBS technology and Dynamic Light Scattering
- Zeta potential - in aqueous and non-aqueous dispersions using M3-PALS technology
- Molecular weight - An absolute measurement using Static Light Scattering and the sensitivity from an avalanche-photodiode detector and fibre detection optics
Malvern Zetasizer Nano series and can measure all three parameters with no performance compromises.
The new technology incorporated in these systems provides unequalled sensitivity and versatility. The patented NIBS optics incorporated into the Nano Z and Nano ZS also allows measurements of samples with little or no dilution.
The unique disposable zeta potential cell ensures no cross contamination of samples.
All systems are compatible with the MPT-2 autotitrator to enable trend measurements and sample preparation to be automated.
