Nanoparticle Analyzer

Common Methods Used to Measure Nanoparticle Size?

In many laboratories today, two widely used techniques for analyzing nanoparticle size are Dynamic Light Scattering (DLS) and Electrophoretic Light Scattering (ELS).

DLS is used to determine the size and size distribution of particles in a solution. This method is based on tracking the Brownian motion of particles when they are illuminated by a laser beam. The scattered light data is then processed by software to calculate the average particle size and the particle size distribution within the sample.

ELS is used to measure Zeta potential, a parameter that helps evaluate the stability of a dispersion system. When the Zeta potential is sufficiently high, particles tend to repel each other, which generally leads to a more stable dispersion. If the value is low, the likelihood of particle aggregation becomes higher.

In practice, many modern nanoparticle analysis systems integrate both methods into a single instrument. Some commonly used models in materials and pharmaceutical laboratories include BeNano 90 Zeta, BeNano 180 Zeta, and Bettersizer 2600. These systems allow users to monitor particle size and evaluate sample stability under different conditions.

Factors That May Affect Nanoparticle Analysis Results

When measuring nanoparticle size, the results can be influenced by several factors related to the sample or the measurement environment, such as:

- Sample concentration that is too high or too low

- The presence of air bubbles or impurities in the solution

- Changes in ambient temperature during measurement

- Particle aggregation before the analysis is performed

- For this reason, careful sample preparation and stable measurement conditions are considered important steps before conducting nanoparticle analysis.

FAQ – Common Questions About Nanoparticle Analysis

1. What is the typical size range of nanoparticles?

Nanoparticles generally range in size from 1 to 100 nanometers. However, in some materials science or pharmaceutical applications, this range may extend to several hundred nanometers depending on the specific purpose.

2. Is it necessary to measure Zeta potential when analyzing nanoparticles?

In many cases, measuring Zeta potential helps assess the stability of a dispersion system. This parameter is commonly used in pharmaceutical research, cosmetics development, and studies involving nano-dispersion materials.

3. Where are nanoparticle analysis instruments typically used?

Nanoparticle analysis systems are commonly used in materials research laboratories, testing and calibration centers, pharmaceutical research institutes, and companies developing advanced mate