size analysis

Sieve analysis is a method used to grade materials by size. This process involves using a sieve to separate particles of powdered or granulated substances based on their dimensions.1

Detecting and characterizing nanoparticles, which are extremely small, presents unique challenges. Their size is often smaller than the wavelength of light, making them invisible to the naked eye and difficult to observe with standard optical microscopes. Specialized techniques are necessary for their detection and measurement. These techniques fall into two main categories: direct methods like electron microscopy, which can image individual particles and measure their size and shape, and indirect methods using X-rays or neutron beams to analyze scattered radiation.2