Nanotechnology deals with materials at the nanoscale, typically between 1 and 100 nanometers. At this scale, quantum effects become significant, affecting the material’s properties in unique ways. For instance, gold nanoparticles can appear red or purple instead of the usual yellow due to changes in their electronic properties. The size of nanoparticles influences their chemical reactivity, optical properties, and mechanical strength, making size a critical parameter in designing nanomaterials for various applications.
