Figure 2.

(a) A nanostructure (nanosystem) of size of O(σ⁻¹) containing millions of atoms is shown. A multiscale approach that accounts for the distinct length scales involved is developed for solving the PB problem. (b) Schematic discretization showing the coarse grid on which the coarse-grained potential profile Φ^* is solved, and the fine grid on which $\stackrel{⃑}{b}$, θ, and ψ are solved.