nanoparticle
Technical term for a particle with dimensions in the nanometer range, used in materials science, chemistry, and related fields.
In this research, the surface of the nanoparticles was covered with a special coating.
Nanoparticles exhibit unique physical properties due to their small size.
Compound of the SI prefix ナノ (nano-, from Greek nânos 'dwarf') and 粒子 (りゅうし, 'particle').