Malvern Zetasizer Nano system for nanoparticle and molecular characterisation

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The Malvern Zetasizer Nano is a widely used system for nanoparticle and molecular characterisation. Proteins, polymers and colloids can quickly and accurately be measured for size, zeta potential, electrophoretic mobility and microrheology without consuming the sample.

The series uses dynamic light scattering (DLS), sometimes referred to as quasi-elastic light scattering (QELS).This non-invasive technique can provide fast and accurate size measurements on samples from 0.3 nm to 10 µ in diameter in 1-2 min. It can also make measurements on samples that are extremely dilute - 0.1 ppm to highly concentrated in the order of 40 wt% solids (depending on the sample type) with as little as 2 µL.

Dr Yacine Hemar, of the School of Chemical Sciences at Auckland University in New Zealand, was one of the first users to take delivery of the the new Zetasizer Nano ZSP. It has supported the work of more than 15 postgraduate students from chemistry, engineering, food and biological sciences. Nano-sized colloidal particles such as casein micelles in milk and emulsion droplets, as well as biopolymers such as polysaccharides in solution, have successfully been characterised.

The Zetasizer Nano ZSP shares the simplicity and ease of use of other Zetasizer Nano systems. Where it stands apart, however, is in its performance specifications for size and zeta potential measurement.