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The small size of nanoparticles is of utmost importance in order for them to maintain their unique optical, electronic, thermal and chemical properties. Measuring their size is therefore critical to understanding these nano-scale materials.

Zeta potential is another important parameter that is related to nanoparticle stability or aggregation in a dispersion, and can have significant implications on product performance.

Light scattering, especially dynamic light scattering, and electrophoretic light scattering are now the standard techniques for measuring the size and zeta potential of dispersed nanoparticles. Two new techniques, Nanoparticle Tracking Analysis (NTA), and also Resonant Mass Measurement (RMM) can also be used for sizing nanoparticles as well as counting the number of particles present in a sample, and both are especially suited to polydisperse samples. Nanoparticle Tracking Analysis (NTA) is provided via the Malvern NanoSight range of instruments, and RMM is available via Archimedes.

Malvern offers a range of fast, reliable and simple to use systems that incorporate light scattering technology, resonant mass measurement or nanoparticle tracking analysis (NTA), which are used to:

  • Determine nanoparticle size.
  • Detect the formation of aggregates in a sample containing nanoparticles.
  • Measure zeta potential for an indication of nanoparticle stability.
  • Count the number of nanoparticles present in a sample.

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Metal colloids - their preparation, application and characterization Webinar - Recorded (English)

Metal colloids represent a very interesting system known since Roman times (the Lycurgus Cup). We'll look at the preparation of these systems looking mainly at gold, silver, and the platinum group metals. All these find extensive application in in...

NanoSight range,Zetasizer range
Date recorded:
February 18 2016

NanoSight NTA3.2 Software Scripting Technical Note (English)

All Nanoparticle Tracking Analysis (NTA) measurements are controlled via Standard Operating Procedures (SOPs) from software scripts. A number of commonly used scripts are supplied with the instrument and here we outline all the available NTA3.2 softw...

Resolving power of NTA Technical Note (English)

Malvern’s latest version of NanoSight NTA software provides peak-to-peak resolving capabilities, above and beyond the resolution provided through tracking particles on a particle-by-particle basis. This feature provides excellent resolving capabiliti...

Measuring NIST Standards with NanoSight NTA Technical Note (English)

To ensure that your NanoSight instrument is performing within specification, it is best practice to regularly measure size-traceable standards. The size standard/s used should be similar to the size of the nanoparticles which are typically measured w...

Non-aqueous zeta potential measurements of carbon black powders Application Note (English)

The measurement of the zeta potential of non-aqueous suspensions is challenging as the electrophoretic mobility of the particles is very small. Here we describe how the Zetasizer Nano in combination with a universal dip cell accessory gives excellent...

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