where r is surface concentration, Cb is bulk concentration. and D is he diffusion coefficient of the particle. Eq. 1 assumes that Cb is unchanging and that there is no back diffusion from the in terface (22). We can estimate rmax (for 100% surface coverage) to be 1.57 mg m from transmission electron microscopy (TEM) images of the BIA 2D lattice (vide infra: Fig- 3A), while D was measured to be 9 87 x 10- cmsi for monomeric BA using dynamic light scattering (SI Appendix. Fig. S5). In cases where the error of the Laplace fit increased before a decrease in IFT was observed, then the onset time of any increase in the error of the Laplace fit was used (SI Appendix, Fig. S6) Fig. 1 shows a plot of regime I time against BA