Surface-to-volume ratio for a sphere is A/V = 3/R — inverse-linear in radius. At R = 1 nm, A/V = 3 nm⁻¹: ~30% of atoms in a 1-nm nanoparticle sit on the surface (for typical interatomic spacing ~0.3 nm). At R = 1 µm, A/V = 3×10⁻³ nm⁻¹:…
Surface-to-volume ratio for a sphere is A/V = 3/R — inverse-linear in radius. At R = 1 nm, A/V = 3 nm⁻¹: ~30% of atoms in a 1-nm nanoparticle sit on the surface (for typical interatomic spacing ~0.3 nm). At R = 1 µm, A/V = 3×10⁻³ nm⁻¹:…