Micro-particles are small particles, typically ranging in size from nanometers to micrometers, that are used in a variety of fields such as medicine, electronics, and materials science. These tiny particles have unique physical and chemical properties that make them valuable for applications such as drug delivery, imaging, and sensing. Researchers are studying ways to manipulate and control the properties of micro-particles to optimize their performance in various applications. Some common types of micro-particles include nanoparticles, microparticles, and colloidal particles.