Fig. 4: Solvent penetration depth analysis.

a Coordination number (CN) and b generalized coordination number (GCN) versus radial depth for each of the eight NPs. Each point is an average of five atoms with similar radial positions. Dashed lines show fits using Eq. 1. Vertical dashed lines indicate the penetration depth \(\delta\) estimated from the fit. Red, green, and black data points correspond to part1, part2, and merged, respectively.