ROS-Responsive Drug Release: Radial Profile & Release Diagram

This 2D companion to the 3D "ROS-responsive nanoparticle" wound-healing simulator keeps the identical reaction-diffusion and Hill-kinetics physics, but computes it independently using a genuinely 2D-native reformulation: because the wound's inflamed core and nanoparticle cloud are both radially symmetric, the ROS field is solved as a 1D radial concentration profile C(r) instead of a 2D spatial grid, and every nanoparticle's degraded fraction is plotted directly against its own distance from the core in a scatter/phase diagram. The result makes the spatial selectivity of the therapy -- how sharply drug release concentrates near the inflamed core as diffusion range and sensitivity change -- directly readable as the shape of two charts, rather than something you have to infer from watching colored dots on a rotating disc.