In Nanotechnology, size plays a crucial role because it directly influences the properties and behavior of materials. Nanomaterials, typically sized between 1-100 nanometers, exhibit unique optical, electrical, and mechanical properties that differ significantly from their bulk counterparts. For instance, at the nanoscale, materials can have enhanced chemical reactivity, increased strength, and different magnetic properties. This size-dependent behavior opens up new possibilities for applications in medicine, electronics, energy, and more.