top of page
Horiba LA-media.png

The Importance of Particle Size Analysis in Nanoparticle Formulations

Particle size analysis is a critical tool for the development and manufacture of nanoparticle formulations. Nanoparticles are defined as particles with a size between 1 and 100 nanometers. This size range gives nanoparticles unique properties that make them ideal for a variety of applications, including drug delivery, biotechnology, chemical, cosmeceuticals, and nutraceuticals.

The particle size of a nanoparticle can have a significant impact on its performance. For example, the smaller the particle size, the greater the overall surface area of the matrix. This is important for drug delivery, as it allows the drug to be more easily absorbed into the body thereby enhancing the drug’s bioavailability.

Particle size can also affect the stability of a nanoparticle formulation. Smaller particles tend to be more stable and are less likely to clump together, which can improve the stability of the formulation.

There are a number of different particle size analysis techniques available. The most appropriate technique for a particular application will depend on factors such as the size of the particles, the type of sample, concentration and the desired level of accuracy.

Some of the most common particle size analysis techniques include:

  • Sedimentation: This technique uses the settling velocity of particles to determine their size.

  • Dynamic Light scattering: This technique uses the scattering of light by particles to determine their size.

  • Laser diffraction: This technique passes a laser beam through a liquid suspension to detect particles from 0.01 µm to 5 mm, depending on the analyzer used.

  • Electron microscopy: This technique uses a beam of electrons to image particles, which can be used to determine their size and shape.


Different applications will benefit from different particle size analysis techniques and using the best tool for the job will aid in the formulation development, and keep production runs accurate. It is important to fully grasp the distinctions when selecting one for your application.

By understanding the particle size distribution of a nanoparticle formulation, it is possible to optimize its performance and ensure that it meets the desired specifications. Here are some of the benefits of achieving a narrow nanoparticle distribution in your formulations:

  • Improved bioavailability: Smaller particles have a higher surface area, which means that they can be absorbed more quickly into the body. This can lead to improved efficacy of the drug.

  • Improved stability; Smaller particles are less likely to clump together, which can improve the stability of the formulation.

  • Improved targeting: The size of nanoparticles can be used to target specific cells or tissues. This can be used to improve the efficacy of drugs and reduce side effects.

  • Improved safety: The small size of nanoparticles makes them less likely to cause toxicity.


Particle size analysis is a valuable tool for developing and manufacturing nanoparticle formulations.

For more information on particle size analysis, visit our partner Horiba Scientific.

bottom of page